Abrasive and superabrasive grinding wheels · Abrasive and hardness for the workpiece, maximum operating speed, ring test and mounting, guard exposure and work-rest gap
A grinding wheel is a bonded abrasive tool — conventional abrasive or superabrasive diamond or CBN — that removes material and finishes surfaces as it rotates at high speed. Settle three things before ordering: the abrasive, grit and hardness for the workpiece material and finish, the size and maximum operating speed for the machine, and the mounting, guarding and inspection the wheel will be used under.
Bonded grinding wheels and superabrasive (diamond and CBN) wheels for bench, surface, cylindrical and tool grinding, and cut-off and cup wheels. Coated abrasives (belts, discs), grinding machines, wire brushes and polishing compounds are outside this page; surface grinding machines have their own page.
01
A linked maker of metallographic cutting equipment states the basic principle for wheel hardness: for soft metals choose a hard wheel, because abrasive grains wear slowly and should not break away early; for hard metals choose a soft wheel, so blunt grains break off and expose new ones — self-sharpening. [2]
Another linked supplier of superabrasive wheels lists cubic boron nitride (CBN) wheels for grinding high-speed steel and other steel blades and diamond wheels for grinding tungsten carbide (cemented carbide) blades, including a cup-shape wheel, with listed specifications such as 50*16*11, 50*15*15 and 50*19*15. [3]
Editorial note: name the workpiece material and hardness, stock removal and finish target in the request, and let the supplier propose abrasive, grit, grade and bond; then compare proposals on those terms.
Give the supplier the machine type and spindle speed, wheel shape and dimensions (diameter, thickness, bore), workpiece material and hardness, operation (surface, cylindrical, tool, off-hand), stock removal and finish target, coolant, maximum operating speed required, and quantity.
02
OSHA's abrasive wheel machinery standard, 29 CFR 1910.215, requires that wheels be closely inspected and sounded (ring tested) immediately before mounting to make sure they were not damaged in transit or storage, and that the spindle speed be checked so it does not exceed the maximum operating speed marked on the wheel. It requires blotters (compressible washers) between flanges and the wheel, except for certain mounted and plate-mounted types. [1]
For bench and floor stands it limits guard exposure of the periphery and sides to 90° — one quarter of the periphery — beginning no more than 65° above the spindle's horizontal plane, or 125° where work must contact the wheel below that plane. The gap between the wheel periphery and the adjustable tongue at the top must never exceed ¼ in, and on off-hand grinders work rests must be kept within ⅛ in of the wheel and adjusted only with the wheel stopped. [1]
It requires cast-steel or structural-steel guards where wheel speed exceeds 8,000 surface feet per minute, up to 16,000 sfpm; cast iron or malleable iron guards may be used up to 8,000 sfpm and for cutting-off wheels 16 in and smaller up to 16,000 sfpm. [1]
Editorial calculation: a 200 mm wheel at 3,000 rpm runs at about 31.4 m/s (π × 0.2 m × 3,000 ÷ 60), or about 6,180 sfpm — below the 8,000 sfpm threshold. Check the result against the maximum speed marked on the wheel before choosing a spindle speed. [1]
03
The UK Health and Safety Executive's guidance HSG17, Safety in the use of abrasive wheels (third edition, 2000), states that the maximum permissible speed in rpm and m/s should be marked on every abrasive wheel larger than 80 mm in diameter, or on its blotter or label; for wheels of 80 mm or less the speed should be posted in a notice, and wheels for 50 m/s and above carry colour-coded stripes. Marking follows Annex A of BS EN 12413, with restriction codes RE1 (not for hand-held or manually guided grinding), RE2 (not for hand-held cutting-off machines), RE3 (not for wet grinding), RE4 (only for totally enclosed working areas) and RE6 (not for face grinding). Organic-bonded wheels for hand-held use bear a use-by date three years from manufacture. With listed exceptions, wheels should be mounted between flanges at least one third of the wheel diameter, with blotters of 0.2 to 1.0 mm between wheel and flanges, and the guard clearance to an unused wheel should be no more than 6 mm. [4]
These UK rules sit alongside the US OSHA requirements for ring testing, speed checks and blotters described above; a wheel supplied for both markets should carry the speed marking and restriction codes both expect. [1] [2] [3]
Editorial calculation: a 200 mm wheel needs flanges of at least 67 mm diameter; at 50 m/s a 200 mm wheel turns at about 4,775 rpm (50 ÷ (π × 0.2) × 60).
| HSG17 point | Value |
|---|---|
| Speed marking on wheel | Wheels larger than 80 mm diameter (rpm and m/s) |
| Colour-coded stripes | Wheels for 50 m/s and above |
| Restriction codes | RE1, RE2, RE3, RE4, RE6 (BS EN 12413 Annex A) |
| Use-by date | 3 years from manufacture, organic-bonded hand-held wheels |
| Flange diameter | At least one third of wheel diameter (with exceptions) |
| Blotter thickness | 0.2–1.0 mm |
| Guard clearance to new wheel | Not greater than 6 mm |
Ask the supplier for the full marking on the wheel (dimensions, specification, maximum speed, restriction codes, use-by date and traceable number) and the flange size and blotters supplied.
04
Suppliers linked to this page list grinding wheels; each card links to the page reviewed.
The listings reviewed cover diamond and CBN grinding wheels for blade sharpening, diamond cup wheels for concrete and stone, cutting and grinding wheels for metal and metallographic cut-off wheels; ask each for the full specification, maximum operating speed and the standard it is tested to.
05
This is a functional reference built from the sources cited; it is not one maker's specification.
| Part | Role | Fix in the order |
|---|---|---|
| Abrasive | Cuts the workpiece; diamond, CBN or conventional. [3] | Abrasive type. |
| Grit size | Removal rate and finish. | Grit. |
| Grade (hardness) | Grain retention; hard for soft metals, soft for hard. [2] | Grade. |
| Bond | Holds grains; resin, vitrified, metal. | Bond. |
| Bore and flanges | Mounting; blotters. [1] | Bore; flange size. |
| Speed marking | Maximum operating speed. [1] | Marked speed. |
06
A grinding wheel quotation needs values for your machine and job. The table explains each field, gives published values where a reviewed source states them, and says what to obtain from the supplier.
| Field | What it means and published values | Ask the supplier for |
|---|---|---|
| Wheel Diameter (mm) | Size with guard fit. [1] | Diameter. |
| Wheel Thickness (mm) | Width of face. | Thickness. |
| Abrasive Grain Size (mesh) | Finish versus removal. | Grit. |
| Maximum Operating Speed (m/s) | Spindle speed must not exceed marked maximum. [1] | Marked speed. |
| Hardness Grade | Hard for soft metals, soft for hard metals. [2] | Grade letter. |
| Maximum Operating Temperature (°C) | Bond limit. | Limit. |
| Static Balance Quality | Vibration at speed. | Balance. |
| Radial Runout (mm) | Concentricity. | Limit. |
| Maximum Humidity (% RH) | Storage condition. | Storage advice. |
| Weight (kg) | Mounting and handling. | Weight. |
| Restriction marking | RE1–RE6 codes per BS EN 12413 Annex A; use-by date 3 years for organic hand-held wheels (HSE HSG17). [4] | Restriction codes and use-by date. |
07
Paste it into your enquiry below or into an email to a maker, then replace every bracket.
Machine: [type; spindle rpm; guard] Wheel: [shape; diameter; thickness; bore] Workpiece: [material; hardness] Operation: [surface; cylindrical; tool; off-hand] Result: [removal; finish] Coolant: [type; none] Speed: [maximum operating speed required] Quantity: [wheels]
These companies list grinding wheels.
Lists diamond and CBN grinding wheels for sharpening corrugator slitting blades.
Product scope checked 2026-10-11
Lists cutting and grinding wheels and diamond grinding tools.
Product scope checked 2026-10-11
Lists single- and double-row diamond cup grinding wheels for concrete and stone.
Product scope checked 2026-10-11
Lists grinding (cut-off) wheels for its metallographic cutting machines.
Product scope checked 2026-10-11
Explore company information and manufacturing capabilities, then discuss the scope of your project with a relevant supplier.
One maker advises hard wheels for soft metals and soft wheels for hard metals, so blunt grains break away. [2]
OSHA 1910.215 requires wheels to be inspected and sounded immediately before mounting to check for damage. [1]
OSHA 1910.215 sets a maximum opening of ⅛ in, adjusted only with the wheel stopped. [1]
A linked supplier lists diamond wheels for cemented carbide and CBN wheels for high-speed steel. [3]
HSE guidance HSG17 says that, with listed exceptions, abrasive wheels should be mounted between flanges at least one third of the wheel diameter, with 0.2–1.0 mm blotters between wheel and flange. [4]
Sources checked 2026-10-12. OSHA 29 CFR 1910.215 is the US federal standard for abrasive wheel machinery; Jinfeng and LLY are linked suppliers publishing selection guidance.
Ask for use case, specification boundaries, supplier type, and RFQ preparation information for this product.
Compare manufacturer profiles with relevant product and process capability.