WEIZHIHAO Sharpening Machines: Models & Buyer FAQ
Weizhihao Machinery (WEIZHIHAO) makes sharpening machines for woodworking cutting tools: circular saw blade grinders, straight knife grinders, profile (copy) grinders and universal tool grinders. Woodworking plants, furniture factories and tool sharpening shops can choose a WEIZHIHAO machine by tool type, tool size, the faces to be ground and daily workload. The answers below put model numbers, working ranges and the conditions that apply side by side, so you can judge which machine fits your workshop.
Which buyers is a WEIZHIHAO sharpening machine suited to?
WEIZHIHAO has a model for each main sharpening task. For carbide-tipped (TCT) circular saw blades, compare the MF125, MF127, MF128 and MF158 series. For long straight knives, choose from the MF2510C/MF2515C, MF2510CNC/MF2515CNC and MF2518–MF2535 range by effective grinding length. For profile and moulding knives, look at the MF223C. To cover several kinds of woodworking tools with one machine, compare the MF2718 series with the matching attachments. The range also includes the MF127C, MF223B, MF250CNC insert blade grinder and MF100CNC serrated knife grinder.
Start with your tools and the result you need, then compare the level of automation, the attachments and the full cost of use.
Choosing a machine
Which WEIZHIHAO machine should I use to sharpen carbide-tipped (TCT) circular saw blades?
Choose by blade diameter and working method. For manual tooth-by-tooth sharpening, consider the MF125. For automatic tooth indexing on repeated work, look at the MF127. To select operations and set parameters on a control panel, compare the MF128 and the MF158 series.
| Model | Saw blade diameter | What to check |
|---|---|---|
| MF125 | Ø105–630 mm | Manual tooth-by-tooth grinding; grinding head swivels ±45°; bevel teeth are adjusted group by group. |
| MF127 | Ø105–630 mm | Automatic grinding of tooth face, tooth top and their bevel angles for flat, bevel and alternate teeth. Not for triple-chip (trapezoid-flat) or hollow-ground teeth. |
| MF128 | Ø105–630 mm | Touch screen to select operations and set parameters; grinds tooth face, tooth top and their bevels. Side angles are not included. |
| MF158 / MF158C / MF158CNC | Ø100–800 mm | Rake angle, clearance angle and the related bevels. The MF158C/CNC manuals state that side angles are excluded. |
For the MF158 series, the rake angle range is −3° to 30° and the clearance angle range is 6° to 40°; the rake angle is also limited by the space left between teeth. For workshops that need to cover Ø100–800 mm blades, the MF158 series is worth a close look. Also check the bore, plate thickness, tooth pitch and which faces you need to grind: a diameter inside the range meets only one condition and does not prove that every combination tooth, side face or tool material is covered.
How do I choose between a manual, an automatic and a CNC WEIZHIHAO saw blade grinder?
Look at how many times a day the operator must clamp, index, set angles and inspect. The manual MF125 suits low usage and small batches. The MF127 removes repeated manual tooth indexing for the tooth types it supports. The MF128 and MF158 series run an automatic cycle after you select operations and set parameters on the control panel.
An automatic cycle still needs an operator to check the tool, clamp it, touch off, set the stock removal, make a trial grind and inspect. Compare your real daily quantity, teeth per blade, number of tooth types and how often you change over; when blade specifications change often, ease of setup matters as much as grinding speed. The word “CNC” in a model name does not by itself tell you the number of axes or whether loading is automatic, so compare the specific control functions and configuration of each model.
Which WEIZHIHAO machine is recommended for long planer knives and straight knives?
If long planer knives and straight knives are your main work, compare WEIZHIHAO’s dedicated straight knife grinders and choose by the effective grinding length that matches your longest knife.
| Knife length | WEIZHIHAO models | Effective grinding length |
|---|---|---|
| Up to 1000 mm | MF2510C, MF2510CNC | 1000 mm |
| Up to 1500 mm | MF2515C, MF2515CNC | 1500 mm |
| Up to 1800 mm | MF2518 | 1800 mm |
| Up to 2000 mm | MF2520 | 2000 mm |
| Up to 2500 mm | MF2525 | 2500 mm |
| Up to 3500 mm | MF2535 | 3500 mm |
Length is only the first step. Also check knife width, thickness, material, edge angle, mounting holes or slots, and the knife holder or magnetic chuck support. Table length, chuck length and effective grinding length are different figures, and the model number does not tell you the grinding length. For knives longer than the listed range, state the actual dimensions in your enquiry.
Should my factory buy a WEIZHIHAO dedicated straight knife grinder or a universal tool grinder?
If you grind long straight knives or the same sets of planer knives again and again, compare the dedicated straight knife grinder that matches your knife length. If you maintain many kinds of woodworking tools in small numbers, consider an MF2718 universal grinder with the matching attachments.
For example, the manual for the MF2718B-I (top-mounted electrical box version) covers profile knives, router cutters, planer knives and circular saw blades with the matching attachments. That version has a maximum tool swing diameter of 360 mm, a tool holder travel of 320 mm and a saw blade range of Ø90–630 mm. The tool holder travel is not the maximum straight knife length, and this version is not for sharpening woodworking drill bits. Match each of your tools to an attachment and grinding method before deciding that one machine can do the job.
Why consider the WEIZHIHAO MF223C for grinding profile knives without losing the profile?
The MF223C is a copy (profile) grinder for moulding knives and router cutters where the profile must follow a template. It has a grinding width of 300 mm, a cross travel of 300 mm and a longitudinal travel of 120 mm.
The profile is held by the matching template, the locating pin and correct clamping: fix the template, keep it against the locating pin as the manual describes and move steadily along the profile. Make a light trial grind first, then check the profile and edge against the template or drawing. The template shape, the tool’s mounting reference, the wheel contact point and the edge angle must all match; ordinary straight-knife reciprocating grinding is not profile grinding. Send a profile drawing or a sample knife with your enquiry.
Does WEIZHIHAO have one machine that sharpens both saw blades and knives?
Yes, within limits. With the matching attachments, the MF2718B-I can use a saw blade grinding device or a straight knife holder to grind circular saw blades and woodworking knives that fit its working range.
This suits workshops with many tool types and few of each, provided every tool fits the clamping and grinding conditions. Changing from saw blades to straight or profile knives still means changing or adjusting attachments, wheels, angles and positioning, then trial grinding; fixtures, sleeves and wheels are not all interchangeable. If one kind of tool is ground in volume over a long period, also compare a dedicated WEIZHIHAO model and count the changeover time and labour.
What information should I send so WEIZHIHAO can recommend the right machine?
Tool data, workload and the target result narrow the choice far more than a price question. Please send, in one message, with units on every dimension:
- Circular saw blades: material, outside diameter, bore, plate thickness, kerf, number of teeth, tooth type, and whether you grind the tooth face, the top or the sides.
- Straight knives: length × width × thickness, material, edge angle, mounting holes or slots, and how many knives per set.
- Profile knives: profile drawing or sample photos, bore and mounting reference, and cutterhead or arbor dimensions.
- Production: quantity per day or per batch, number of tool specifications, how often you change over, the wood or board you cut, and current problems.
- Quality: what you inspect, the tolerances you accept, edge appearance and any test-cut requirement.
- Installation and delivery: voltage, phase and frequency, installation space, and destination country and city or port.
Photos should show the whole tool, a close-up of the edge and a dimension reference. Include your smallest, largest and hardest-to-grind tools so the model and attachments can be checked against all of them.
What power supply and floor space does a WEIZHIHAO sharpening machine need?
Check voltage, phase, frequency and the machine’s full electrical load first, then plan the space. Main motor power and total machine power are listed separately below; dimensions are the machine body only.
| Model | Power | Machine size L × W × H |
|---|---|---|
| MF125 | Main motor 0.37 kW; coolant pump 0.04 kW | 600 × 480 × 800 mm |
| MF127 | Main motor 0.55 kW; feed motor 0.06 kW | 1130 × 800 × 1380 mm |
| MF128 | Main motor 0.55 kW; feed motor 0.06 kW | 1450 × 780 × 1480 mm |
| MF158 | Total machine power 1.65 kW | 1600 × 1250 × 1800 mm |
| MF223C | Main motor 2.2 kW; coolant pump 0.09 kW | 1180 × 1050 × 1380 mm |
| MF2510C / MF2515C | Grinding head 3.0 kW; traverse 0.12 kW; coolant pump 0.09 kW | 2600 × 1000 × 1400 mm |
| MF2518 | Grinding head main motor 7.5 kW | 3550 × 1200 × 1850 mm |
| MF2525 | Grinding head main motor 7.5 kW | 4250 × 1200 × 1850 mm |
The MF158 manual specifies a three-phase 380 V supply. For other models and orders, follow the nameplate and wiring diagram of the machine you buy; do not size cables from the main motor power alone. Your local voltage can be requested as an order configuration, stated together with phase and frequency. Installation space must also allow for operation, loading long knives, opening the electrical cabinet, maintenance and moving the machine; floor loading and transport are planned from the actual net weight, foundation needs and packed gross weight.
Price and quotation
What decides the price of a WEIZHIHAO sharpening machine, and how do I judge value?
Price depends on the model and configuration: manual or automatic cycle, control system and angle setting, tool working range, guideway and clamping design, wheel and attachment package, and electrical configuration. Judge value by first checking that the machine can do your tool work, then compare setup, grinding and maintenance effort.
When comparing WEIZHIHAO with other options, list the machine, attachments, spare wheels, wooden case, freight, insurance and taxes separately, and record the full grinding cycle. The machine price and the wooden case are quoted separately, so the unit price is not a delivered price. Prices are given by quotation for the chosen model and configuration.
Which wheels, fixtures and tools come with a WEIZHIHAO machine?
Each model has its own packing list; check it against the model you order. For example, the MF158 and MF158C manuals list one face grinding wheel and one top grinding wheel (Ø125 × Ø32 mm), two wheel heads, a 1.5–10 mm hex key set, a 32 mm open-end spanner, centre sleeves of Ø30 × 12, Ø25.4 × 12, Ø22 × 10 and Ø20 × 10 mm (one each) and an operating manual. This list applies only to those manual versions.
Use the centre sleeve sizes to check your saw blade bores, and list any extra sleeves, special fixtures, spare wheels and spare parts separately. Final delivery is checked against the supply list and packing list of your order.
Can I ask WEIZHIHAO for a quotation for a single machine?
Yes. Request a quotation for one machine and state the model, your tools, power supply and destination, with the attachments and packing you need, so the full configuration can be priced. For larger orders, state the actual quantity; special tooling and custom items are listed separately. Batch terms are not applied automatically to single-machine orders.
How is the lead time for WEIZHIHAO standard and customised machines set?
Lead time depends on the model, configuration and production schedule of each order. A standard machine must match the voltage, attachments and version you need; customised projects also involve design, parts preparation and testing. Plan with four separate stages: stock or production, configuration and test run, packing and dispatch, and transport to arrival. The order should state the ex-works date and the transport arrangement separately; “ready to ship” is not the same as “arrived at port” or “installed in your workshop”.
How are payment and EXW, FOB or CIF terms agreed with WEIZHIHAO?
Tell us whether your own forwarder will collect the machine or whether you need transport arranged, and give the named place or destination port. If you want to compare EXW, FOB or CIF, state the term in your enquiry; the applicable terms and cost scope are confirmed in the formal quotation. Currency, deposit and balance, payment milestones, packing, freight, insurance and duties are written into the quotation, proforma invoice or contract together with the machine configuration. Deposit ratios, ports and transport plans are set per order.
How is a WEIZHIHAO machine packed and shipped overseas?
WEIZHIHAO supplies international buyers. Machines can be packed in a wooden case per order, and the case is priced separately from the machine. Shipping is planned from the packed dimensions and gross weight, the destination, the route and the delivery terms; do not estimate freight from the bare machine weight. The packing list itemises the machine, wheels, centre sleeves, tools and documents. On receipt, check the cases and accessories and record any transport damage before installation. Transit time depends on the sailing schedule, transhipment and customs clearance of each shipment.
Installation, warranty and troubleshooting
How should I prepare installation and training for a new WEIZHIHAO machine?
Train on the actual model, attachments and tools you will grind. English manuals are available for models including the MF158C, MF158CNC, MF2515C-I and MF2718D, and documentation is prepared to match the version you buy. Power connection and earthing must be done by a qualified electrician.
Training should cover power checks, clamping and positioning, matching wheels to tools, touching off and angle setting, tooth type or program selection, light trial grinding and inspection, daily cleaning and lubrication, and emergency stops. An operator who can repeatedly produce a first piece that passes inspection is ready to work alone. The scope, language, timing and cost of remote guidance or on-site installation are written into the order.
What warranty support does WEIZHIHAO provide?
WEIZHIHAO provides warranty support. The period, start date, covered parts and handling depend on the model and are set out in the warranty terms of each order. Check how mechanical parts, electrical parts, wear items and freight are handled when you order. Normal wear of consumables such as grinding wheels is treated differently from part defects and from damage caused by misuse or overload.
When reporting a problem, send the full model, serial number, purchase or shipping record, the exact alarm text and photos or video of the fault, so the problem can be matched to your machine version.
Which consumables and routine maintenance does a WEIZHIHAO machine need?
Watch the grinding wheels, the coolant system, and the fixtures and locating parts. Choose wheels by tool material, ground face, mounting size and permitted speed. Replace a wheel based on wear, damage and grinding results, not a fixed number of tools; stop using a wheel that is cracked, damaged or worn to the maker’s limit, and dress a loaded or glazed wheel as that wheel allows. Check fixtures, centre sleeves and locating parts for contact faces, clearance and clamping, rather than replacing them on a fixed calendar.
For example, the MF158 manual recommends cleaning and lubricating after each day’s use, cleaning the coolant tank and changing the anti-rust fluid at least monthly, and changing the hydraulic oil every 3–5 months. Other models follow their own manuals. When ordering spare parts, send the model, serial number, a photo and the specification of the part.
How do I judge whether a WEIZHIHAO machine’s grinding accuracy meets my needs?
Judge accuracy on your own tools and agreed inspection items, not on a single “± mm” figure. For circular saw blades, check tooth height consistency within the same tooth type, rake and clearance angles, left/right symmetry, edge chipping and runout. For straight knives, check straightness over the full length, edge angle, surface finish and consistency within a set. For profile knives, check the profile against the template or drawing.
Clean the clamping reference before measuring, use a gauge or optical method suited to each item, and define the measuring position, reference, tool length and acceptance conditions. The designed height difference of triple-chip teeth is not an error. Handwheel graduations, control resolution or unloaded repeat movement are machine settings, not the measured accuracy of the finished tool.
How do I troubleshoot uneven teeth, burning or chipping on a WEIZHIHAO machine?
Record the original tooth type, angles and condition before grinding. Change one factor at a time, make a light trial grind and inspect again. If a tooth is hit, the tool shifts, there is strong vibration or a crack appears, stop immediately; inspect the clamping only after the machine has stopped completely and the power is isolated.
| Problem | Check and correct first | Re-inspect |
|---|---|---|
| Teeth look uneven in height | First tell design from defect: triple-chip and other combination teeth have a designed height difference. If teeth of the same type differ, check the blade and flange contact faces, positioning and clamping, the indexing end point, and missed or double-ground teeth. | Compare all teeth of the same type around the blade, keeping the original tooth sequence and height relationship. |
| Missed teeth, double indexing, left and right teeth ground wrongly | Check that the mechanical indexing and the program agree: indexing distance, start tooth, count or multiplier, and wheel angle. In the MF127 manual, straight teeth index one tooth at a time (P=1) and alternate teeth index two at a time (P=2), finishing one group before the other. These are examples for that model, not universal settings. | Every group fully ground, no missed or repeated teeth. |
| Dark or burnt edges | Check whether each infeed is too heavy and whether the wheel is loaded or glazed. In wet grinding, check that coolant reaches the contact zone continuously, and check nozzles, pipes and return filtering. Dress or replace the wheel and reduce the stock removal per pass. On the MF256 and MF2510C, “2 mm per handwheel turn” is the mechanism feed, not the depth of one grinding pass. | Inspect the edge and grinding quality; a freshly shiny surface does not prove that heat damage is gone. |
| Chipped edges or corners | Tell existing damage from new damage. Check the abrasive, grit and bond of the wheel, clamping support, wheel runout and infeed shock. TCT carbide and HSS do not share an abrasive just because the wheel bore is the same. | Inspect the edge under magnification; broken teeth, brazing faults or plate cracks go to a specialist for repair or scrapping. |
| Chatter marks, poor finish or changing noise | Check wheel mounting and condition, tool support and locking, and guideway cleaning and lubrication. On hydraulic machines, check oil level, leaks and smooth feed; the MF158C/CNC manuals note that low oil or air in the oil causes vibration and noise. | After correction, make a light trial grind and watch the motion, sound and grinding marks. |
| Long straight knife ground differently at the ends and in the middle | Clean the knife back, locating face and chuck or holder; check seating, knife bow, even clamping and that the travel covers the whole edge. | Check straightness and the edge after removing the knife from the chuck. |
If the edge still has burrs or the test cut is poor, check the tooth type, angles, whether the worn area was fully removed, and how the tool is mounted in use, and keep photos of the test cut. Do not keep grinding away tooth material before you know whether the problem comes from sharpening, tool damage or the cutting machine. Hydraulic, bearing and electrical repairs are for technicians, and limit switches or guards must never be bypassed. The model examples above come from the MF127, MF256, MF2510C and MF158C/CNC manuals; follow the manual for your machine version. General grinding guidance: Norton surface grinding tips and the Norton precision grinding troubleshooting guide.
How long does a WEIZHIHAO machine take to sharpen one saw blade or a set of straight knives?
There is no single “minutes per blade”. The full time depends on the number of teeth or the knife length, wear, stock removal, faces ground, number of passes and changeovers. For a fair comparison, use the same tool, the same grinding task and the same acceptance standard.
Reference motion figures from the manuals: MF127 indexing speed 1–24 teeth per minute; MF158 series working speed below 20 teeth per minute; MF2518 and MF2525 grinding head traverse 3–12 m/min. These are machine motion figures, not the time for a complete blade or knife set. Count cleaning, clamping, touching off, grouping, face changes and inspection in any comparison.
Comparisons and alternatives
When is it worth buying a WEIZHIHAO machine to sharpen in-house?
It is worth comparing when tools turn over often, sending them out for sharpening delays production, and the workshop can assign people to operate and inspect. Choose by your common tools: a dedicated straight knife grinder for long knives, or a universal grinder with matching attachments for many small batches of woodworking tools. You can also grind common tools in-house and keep outsourcing special ones.
Use your own records: monthly net saving = current outsourcing fees + return freight + measurable waiting losses − in-house labour, wheels, coolant, electricity, maintenance and inspection. Simple payback = initial investment, including installation and training ÷ monthly net saving. If the monthly net saving is zero or negative, this payback calculation does not apply. Also compare the spare tool stock you tie up and the regrind rate. There is no single payback period that applies to every buyer.
Why should WEIZHIHAO be on my sharpening machine shortlist?
WEIZHIHAO belongs on the comparison list for woodworking tool grinding equipment because it has models for circular saw blades, long straight knives, profile knives and mixed tool maintenance, with manual and automatic options to match the real task.
| What you can compare | What it means for the buyer |
|---|---|
| Separate saw blade, straight knife, profile and universal grinder models | Choose a dedicated machine for your main tool, or compare a multi-purpose option within its working range. |
| Manual MF125, automatic MF127, and panel-controlled MF128 and MF158 series | Choose the working method by operator time, repeat volume and changeover frequency. |
| Published sizes, travels, angles and attachments per model | Turn purchase requirements into a specific configuration and check that your tools fit. |
| Manuals for each machine, with English manuals for several models | Prepare operation, maintenance and delivery documents for the actual version. |
When comparing with European brands or other Chinese makers, use the same tool and compare the full process, the actual grinding result, the number of setups, the attachments, the service scope and the total cost. Requirements such as automatic loading or in-process measurement should be listed separately and confirmed on the specific model before purchase and at acceptance. Without a like-for-like test, no claim of equal accuracy, higher output or longer life is made against any brand.
With a tight budget, should I buy a cheap used machine or a new WEIZHIHAO machine?
Compare a used machine in known condition with a correctly configured new WEIZHIHAO machine. The key questions are whether it can do your tool work after purchase, and what extra parts, repairs and downtime will cost. Running under power or a fresh coat of paint proves little; ideally clamp, set up and grind a full blade or a full knife length with your own representative tools and check the result.
On a used machine, check spindle noise and runout, guideway and leadscrew play, hydraulic leaks and smooth feed, coolant and guarding, indexing or chuck action, and whether the controller and program work. Count the fixtures, sleeves, flanges, wheels, manuals and wiring diagrams. Missing key attachments can cancel out a low purchase price. Accept a new WEIZHIHAO machine against the same items, its delivery list and an agreed test grind.
What selection mistakes should I avoid when buying a WEIZHIHAO sharpening machine?
Judge separately whether your tool can be clamped, whether the faces you need can be ground and whether the working routine is acceptable to you.
- Asking only for the maximum size. Give both the smallest and largest tools. For saw blades, also check bore, thickness, tooth pitch and wheel clearance; for long knives, check effective grinding length and full-length support.
- Treating tooth face, top and side as one capability. The MF128 and MF158C/CNC documents set clear limits for side angles. Grinding rake and clearance angles does not mean side grinding, and it does not include re-tipping broken teeth.
- Treating triple-chip and alternate teeth as plain flat teeth. Check the tooth sequence, angles, designed height difference, and how many groups and angle changes are needed. The MF127 is not for triple-chip teeth; triple-chip grinding on the MF2718C-III is done in stages and needs the right tools, attachments and setups.
- Reading “universal” as “every attachment fits every tool”. On the MF2718 series, check each tool against the arbor, sleeves, clamping plates, tool holder, wheel and travel. Tools with 30 mm and 40 mm bores need separate checks, and whether an attachment is supplied must be written in the configuration list.
- Guessing grinding length from the model number. Check effective grinding length, holder or chuck support and full travel clearance, not machine length or the model suffix.
- Asking how many tools per day without giving teeth, wear and changeovers. Per-tooth cycle time excludes cleaning, clamping, touching off, face changes, grouping and inspection.
- Assuming an automatic cycle needs no operator. List who loads, clamps, touches off, sets angles, dresses wheels and inspects. With frequent changes, changeover time may matter more than grinding speed.
- Giving only the voltage. “220 V” or “240 V” is not enough; state single or three phase and 50 or 60 Hz, and check the full load. An adapter or a transformer does not automatically solve every supply difference.
- Treating the machine price as the delivered price, and main motor power as total power. Check the wooden case, spare wheels, fixtures, freight, taxes, installation and training, plus pump, hydraulic and other loads, service access, handling space and floor loading.
- Watching a demo video but not your own tool. Watch the whole process from clamping and setup to grinding and inspection on the same kind of tool, especially left/right tooth group changes, full-length contact on long knives and profile retention. Set acceptance criteria for your own tools.
How can I arrange a test grind, a video check or a factory visit before buying from WEIZHIHAO?
Send photos, material, dimensions, faces to be ground and the target result through the contact page, then discuss sending samples for a test grind or booking a factory visit. Before sending samples, agree the number of samples, addresses, scope of the test, cost and return arrangements; before a visit, agree the date and the models you want to see.
The check should use the real model, wheels and fixtures and show clamping, touching off, grinding and inspection, ideally on your smallest, largest or hardest tools. Videos should clearly show the workpiece and key steps, and results are judged against the dimensions, edge and test-cut requirements agreed in advance. Third-party factory inspections are arranged separately.
Contact WEIZHIHAO: start from your tools
When you are ready to buy a sharpening machine, send WEIZHIHAO photos of your tools, their dimensions and material, your daily or batch quantity, and your local voltage, phase and frequency. Include your smallest, largest and special tools, and the grinding problem you want to solve. Use the contact page, email [email protected] or WhatsApp. Company details are on the company profile page.