1 · What is happening at this step
Material is removed with a bonded abrasive wheel to hold a dimension or to reach a surface finish that milling and turning cannot. The operations covered here are surface grinding, cylindrical and centreless grinding, and tool and cutter grinding. The buyer is usually a machining shop, a cutting tool manufacturer or a bearing manufacturer, and the specification is set by tolerance and finish, not by appearance.
[TO CONFIRM: image — process photograph of a grinding operation on a machine, own material or authorised only, registered in ../assets/_manifest.md]
2 · What usually goes wrong
The wheel grade does not suit the material. A grade that is too hard for the workpiece will not release dull grains: the wheel glazes, stops cutting, rubs and burns. A grade that is too soft wears away before the work is done, form is lost and the size drifts. Grade selection balances the workpiece material and hardness, the contact area and the removal rate — there is no default that covers all of them.
Burning and thermal damage. Burn appears as temper colours, a re-hardened layer or micro-cracks. It comes from a glazed or loaded wheel, excessive infeed, insufficient or badly aimed coolant, or a wheel that has not been dressed. On bearing races and cutting tools this is a scrap-level defect, and it can be latent: the part passes inspection and fails in service, which is the most expensive outcome available.
Loading on soft or gummy materials. Aluminium, copper, some stainless grades and nickel-based alloys load the wheel face. A loaded wheel rubs instead of cutting, heats the workpiece and finishes poorly. The answer is normally a more open structure, a different grain, or a shorter dressing interval — not more pressure and not more coolant.
Chatter marks. A regular pattern on the ground surface points to wheel imbalance, a wheel that is too stiff for the setup, spindle or fixture condition, or infeed that is too aggressive. Chatter is diagnosed by its wavelength; changing the wheel without checking the machine simply wastes wheels.
Cost measured per wheel instead of per part. The lowest unit price is often the highest cost per part once dressing frequency, wheel life, cycle time and scrap are counted. A wheel that lasts twice as long at 1.5 times the price is the cheaper wheel. If a supplier will not discuss cost per part, the comparison is being made on the wrong number.
3 · What we can supply
Wheels are supplied as bonded grinding wheels from an established Chinese manufacturer. Original-brand wheels can be quoted on request. [TO CONFIRM: approved wording for third-party brand supply — no third-party trademark, logo or catalogue imagery may appear on this page or in its images until written authorisation is obtained]
POLIRITE B-Series — bonded grinding wheels
[TO CONFIRM: series designation pending finalization]
Specification range available
– Wheel diameter: [TO CONFIRM: available diameter range in mm]
– Wheel thickness: [TO CONFIRM: available thickness range in mm]
– Bore size: [TO CONFIRM: available bore sizes in mm]
– Abrasive grain: [TO CONFIRM: available grains — do not list options until confirmed]
– Grit size: [TO CONFIRM: available grit range]
– Grade / hardness: [TO CONFIRM: available grade range and marking system]
– Structure: [TO CONFIRM: available structure numbers]
– Bond type: [TO CONFIRM: which of vitrified / resinoid / rubber / shellac / metal bonds are supplied]
– Maximum operating speed: [TO CONFIRM: rated maximum operating speed in m/s and rpm — safety-critical, must come from the factory marking, never estimated]
– Balancing and runout tolerance: [TO CONFIRM: balancing and runout tolerance]
Operations and equipment
– Operations covered: [TO CONFIRM: which of surface / cylindrical / centreless / tool and cutter grinding are actually supplied]
– Applicable workpiece materials: [TO CONFIRM: material list and hardness range]
– Machine types the range suits: [TO CONFIRM: machine types and typical spindle speeds]
Dressing and truing
Dressing restores cutting ability by fracturing or removing dull grains; truing restores the wheel form. How often a wheel needs dressing, and how much is taken off per pass, depends on the bond, the grade, the material and the removal rate, and it is the main lever on both finish and cost per part.
- Recommended dressing method: [TO CONFIRM: single-point diamond / rotary diamond dresser / other]
- Recommended dressing interval: [TO CONFIRM: recommended dressing interval]
- Recommended infeed per dressing pass: [TO CONFIRM: recommended infeed per dressing pass]
-
Whether diamond dressing tools are supplied: [TO CONFIRM: whether diamond dressing tools are supplied]
Mounting and speed safety
A wheel must never be run above the speed marked on it. Flange condition and diameter, blotter washers, correct nut torque and a ring test before mounting are standard practice, and the spindle speed must be verified against the wheel marking before the machine is started. -
Marking and labelling supplied on each wheel: [TO CONFIRM: marking and labelling supplied on each wheel]
- Whether mounting hardware or blotters are supplied: [TO CONFIRM: whether mounting hardware or blotters are supplied]
Supply terms for products on this page - MOQ: [TO CONFIRM: MOQ per specification]
- Lead time: [TO CONFIRM: lead time in days after receipt of deposit]
- Customisation: [TO CONFIRM: whether non-standard dimensions, grades and bonds can be made to drawing]
- Packaging for export: [TO CONFIRM: crating or cartoning, and any moisture protection]
- Documents supplied with shipment: [TO CONFIRM: which shipment documents are provided — nothing may be listed until it has actually been issued]
- Samples or trial wheels: [TO CONFIRM: whether trial wheels are supplied and on what terms]
[TO CONFIRM: image — product close-up of wheel marking and packaging photograph, own material or authorised only; must contain no third-party trademark or catalogue artwork; registered in ../assets/_manifest.md]
4 · Request a quote
Send the wheel specification you run today, or a drawing, together with the workpiece material and hardness, the machine and the result you need — we will quote against it.
Button: Request a quote → /contact/
Form prefill hint: Current wheel marking or drawing · Operation (surface / cylindrical / centreless / tool) · Workpiece material and hardness · Machine type and spindle speed · Removal rate and required surface finish · Annual usage