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powertoolspros.net · Angle-grinder disc, RPM and cut-depth check calculation record · FIT CHECK

Angle-grinder disc check

Job / reference: ______________________________Printed date: ____

Formula registry version 1.0.0 · researched 2026-07-24

TF-08 · Task & fit

Angle-grinder disc check

This deterministic screen evaluates only declared numeric and interface gates. It never declares a disc/grinder combination generally fit for use.

FIT CHECK

Entered disc, grinder and depth data

Disc markings
Grinder and cut

Method and worked example

vtool = π × disc diameter (m) × tool maximum/no-load rpm ÷ 60

Diameter: disc ≤ tool accepted diameter. RPM: tool ≤ disc marking. Surface: calculated tool m/s ≤ disc marking. Depth: required ≤ manufacturer maximum. Interface strings must match.

Worked example: 125 mm at 11,000 rpm gives 71.99 m/s. 125 mm/12,250 rpm disc versus 125 mm/11,000 rpm grinder passes diameter and RPM gates. Required 35 mm versus entered maximum 33 mm fails by 2 mm.

Blank worksheet

Disc diameter / max rpm / max m/s / interface:
Tool diameter / max rpm / interface:
Required / declared maximum depth:
Marking / guard / material confirmations:

Disc and grinder fit-check record

Result recordFIT CHECK

Worked example — default entered values

71.99 m/s rim speed
  • Diameter: gate passed
  • RPM: gate passed
  • Marked peripheral speed: gate passed
  • Interface/bore: gate passed
  • Required cut depth: gate failed

Required depth exceeds the entered maximum by 2 mm.

Remaining markings and fit checks require confirmation.

Assumptions register

Disc 125 mm / 12250 rpm / 80 m/s / 22.23 mm · Grinder 125 mm / 11000 rpm / 22.23 mm · Depth 35 mm required / 33 mm entered maximum

Tool RPM is the maximum/no-load value.

Peripheral speed uses the new disc nominal diameter.

Entered maximum depth is exact manufacturer data for the selected configuration.

A numerical pass does not establish disc type, mounting or condition.

△ Stop condition

The worked example depth gate fails. Do not fit/use this combination while any diameter, RPM, peripheral-speed, interface or depth gate fails, or a restriction applies.

FIT CHECK. A gate result is not an overall verdict. Manufacturer instructions, wheel markings and condition, mounting, guard, intended operation and target material govern.

Source register · registry version 1.0.0

HSE · published 2000; reprinted through 2011, Safety in the use of abrasive wheels (HSG17, Third edition) — accessed 2026-07-24

UK legislation, The Provision and Use of Work Equipment Regulations 1998 — effective 1998-12-05 — accessed 2026-07-24

Bosch Professional, EXPERT EXWS18V-15S Angle Grinder — technical data — accessed 2026-07-24

Formula researched 2026-07-24