Customer tools
Linear speed and RPM
Enter the disc diameter and convert revolutions per minute to peripheral speed, or vice versa.
Use the actual diameter, allowing for wear.
Enter the lowest applicable limit for disc, mounting and machine. It is not derived from the calculation.
Add the m/s limit marked on the tool. It applies together with the RPM limit, not instead of it.
Calculated conversion
- Ø
- 200 mm
- RPM
- 3,000
Safety not verified: enter the actual tool, mounting and machine limits and consult product-specific instructions before use.
Mathematical value, not an authorised machine setting. Limit comparison uses unrounded values.
Formulas and units
v [m/s] = π × D [mm] × n [RPM] / 60 000
n [RPM] = 60 000 × v [m/s] / (π × D [mm])
This conversion does not determine maximum permissible or optimum speed. Follow manufacturer limits and instructions for the disc, mounting and machine. TEMI process speeds are indicative, not a safety certification.
Speeds by tool and operation
Select the Hilzinger-Thum model and process. Catalogue guidance and safety-sheet maximums are shown separately.
Limits and safety
Safety not verified: enter the actual tool, mounting and machine limits and consult product-specific instructions before use.
Recommended process speeds are not maximum permitted speeds. Do not apply HT ratings to TEMI or other manufacturers’ tools. A lower tool, mounting or machine limit always takes precedence; wear does not allow the marked RPM to be exceeded.
At shared diameter boundaries, the lower published RPM limit is used. Converted RPM ceilings are rounded down.
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General guidance by operation
Indicative process values depend on material, geometry and finish. General page 5 values are not a model-specific prescription.
| Operation | m/s | RPM at entered diameter |
|---|---|---|
| Grinding | ≈ 30 m/s · −10% / +20% | 2,578.31–3,437.75 RPM |
| Dry deburring | ≈ 15 m/s · ±10% | 1,289.16–1,575.63 RPM |
| Wet deburring | ≈ 25 m/s · ±10% | 2,148.59–2,626.06 RPM |
| Satinizing | ≈ 15 m/s · −15% / +10% | 1,217.54–1,575.63 RPM |
| Metal polishing | ≈ 36 m/s · ±15% | 2,922.08–3,953.41 RPM |
| Polishing contoured metals | 15–25 m/s · ±10% | 1,432.39–2,387.32 RPM |
| Plastics, varnishes and wood | ≈ 15 m/s · ±10% | 1,289.16–1,575.63 RPM |
HT Main Catalog · p. 5 · Recommended process speeds are not maximum permitted speeds. Do not apply HT ratings to TEMI or other manufacturers’ tools. A lower tool, mounting or machine limit always takes precedence; wear does not allow the marked RPM to be exceeded.
HT limits by model
Recommended process speeds are not maximum permitted speeds. Do not apply HT ratings to TEMI or other manufacturers’ tools. A lower tool, mounting or machine limit always takes precedence; wear does not allow the marked RPM to be exceeded.
| HT tool group | Ø mm | max. m/s | Ø 0–100 RPM | Ø 100–200 RPM | Ø 200–300 RPM | Ø 300–400 RPM | Ø 400–500 RPM | Ø 500–600 RPM | Ø 600–700 RPM | Ø 700–800 RPM | Ø 800–1,000 RPM |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Cotton buffs D1AK / D1C / D1BK / E | 100–1,000 | 35 | 5,000 | 3,000 | 2,000 | 1,700 | 1,400 | 1,200 | 1,000 | 800 | 700 |
| Sisal buffs C1 / C2 / C3 / C4 / C8 / C10 / C11 / C13 | 100–1,000 | 35 | 5,000 | 3,000 | 2,000 | 1,700 | 1,400 | 1,200 | 1,000 | 800 | 700 |
| Non-woven rings B10K / B13K | 100–1,000 | 20 | — | 2,000 | 1,300 | 1,000 | 800 | 650 | 550 | 500 | 400 |
| Non-woven rollers B7W | 100–450 | 20 | — | 2,000 | 1,300 | 1,000 | 800 | — | — | — | — |
| Non-woven disc brushes T7 / T7SL | 60–250 | 20 | 3,500 | 2,000 | 1,300 | — | — | — | — | — | — |
| Fibre brushes P3 | 100–500 | 20 | — | 2,000 | 1,300 | 1,000 | 800 | — | — | — | — |
| Circular brushes B5 / M / B6K / P10 | 50–500 | 20 | 3,500 | 2,000 | 1,300 | 1,000 | 800 | — | — | — | — |
| Non-woven wheels B7 | 50–500 | 20 | 3,500 | 2,000 | 1,300 | 1,000 | 800 | — | — | — | — |
| Abrasive disc brushes T10 / T12 / T50 / T6 / T8 / T68 / T66 | 60–500 | 20 | 3,500 | 2,000 | 1,300 | 1,000 | 800 | — | — | — | — |
| Compact wheels B30 / B70 | 50–400 | 20 | 3,500 | 2,000 | 1,300 | 1,000 | — | — | — | — | — |
| Rubber-bonded compact wheels B60 | 50–400 | 20 | 3,500 | 2,000 | 1,300 | 1,000 | — | — | — | — | — |
| Abrasive flap wheels B3S / B1 | 100–800 | 45 | 6,000 | 4,300 | 3,000 | 2,200 | 1,800 | 1,500 | 1,300 | 1,100 | — |
Official HT safety sheet · 06/2023 · p. 2 · At shared diameter boundaries, the lower published RPM limit is used. Converted RPM ceilings are rounded down.
The HT sheet specifies fixed machines with guards, not handheld tools. Check condition, mounting, flanges and product-specific protection instructions. Do not start the machine unless limits are confirmed.
Compare other diameters
Calculated values keeping your input (RPM or m/s) fixed. Not recommended operating speeds. Select a diameter to try it.
| Ø mm | RPM | m/s |
|---|---|---|
| 3,000 | 15.71 | |
| 3,000 | 23.56 | |
| 3,000 | 31.42 | |
| 3,000 | 39.27 | |
| 3,000 | 47.12 | |
| 3,000 | 62.83 | |
| 3,000 | 78.54 |
The calculation uses π without intermediate rounding. The historical TEMI table retains its published values, including some inconsistencies; it does not drive this calculation.