CHMR 075 Worm Gearbox with Input Shaft (Ø28 mm output shaft)
CHMR 075 — the CHM worm gearbox with a solid input shaft instead of the motor flange — for belt, chain or coupling drives, or a motor mounted separately. Aluminium housing, hollow output shaft with 28 mm bore, keyed; optional output flanges (the F executions on the dimension drawing). Input shaft Ø24 j6 × 50 mm with M8 centre thread, key 8 mm (dimensions on the input-shaft sheet; everything else as the CHM 075). Supplied for the B3 mounting position — tell us if you need a different orientation (see the mounting-position drawing). Filled for life with synthetic oil — no oil changes, no maintenance.
How to pick from the table: the figures are for a 1400 r/min input (a 4-pole motor's speed) — the ratio sets the output speed, P1 is the input power the catalogue rates the row at and the service factor is the margin at that power. Drive the input shaft slower or faster and the output speed scales with it; ask us to check the rating if your input speed differs.
Product Configuration
Select a row to add it to your quote
CHMR 075: ratings as the CHM 075 at 1400 r/min input; input shaft Ø24 j6 × 50 mm.
| Code | Ratio | Output speed | Input power P1 | Output torque | Service factor |
|---|---|---|---|---|---|
CHMR-075 R.7.5 |
7.5:1
|
186.7 r/min
|
4 kW
|
180 Nm
|
1
|
CHMR-075 R.10 |
10:1
|
140 r/min
|
4 kW
|
237 Nm
|
0.8
|
CHMR-075 R.15 |
15:1
|
93.3 r/min
|
3 kW
|
260 Nm
|
0.8
|
CHMR-075 R.20 |
20:1
|
70 r/min
|
1.5 kW
|
167 Nm
|
1.2
|
CHMR-075 R.25 |
25:1
|
56 r/min
|
1.5 kW
|
204 Nm
|
1
|
CHMR-075 R.30 |
30:1
|
46.7 r/min
|
1.5 kW
|
232 Nm
|
1
|
CHMR-075 R.40 |
40:1
|
35 r/min
|
1.1 kW
|
214 Nm
|
1
|
CHMR-075 R.50 |
50:1
|
28 r/min
|
0.75 kW
|
176 Nm
|
1.2
|
CHMR-075 R.60 |
60:1
|
23.3 r/min
|
0.75 kW
|
199 Nm
|
1
|
CHMR-075 R.80 |
80:1
|
17.5 r/min
|
0.55 kW
|
178 Nm
|
1.1
|
CHMR-075 R.100 |
100:1
|
14 r/min
|
0.55 kW
|
203 Nm
|
0.9
|
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Product Information
Reading the table
Each row is one ratio: output speed at 1400 r/min in, the rated input power P1, the output torque at that power and the service factor. Where the catalogue prints a power the gear cannot fully use (marked in the row note), choose by torque, not power.
Service factor — the number that decides how long your gearbox lives
It's the safety margin between what the gearbox can handle and what the drive asks of it: 1.0 means the gearbox works exactly at its rated limit; higher means reserve capacity — a cooler, quieter drive and a much longer life. As a guide: smooth, steady loads (light conveyors, centrifugal pumps) are fine near 1.0; moderate loads (heavier conveyors, packing machines) deserve 1.3 or more; heavy duty (mixers, bucket elevators, frequent starts, long running hours) should sit at 1.5–2.0.
- Material
- Aluminium housing
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