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Chiaravalli CHME 075 worm gearbox with a motor flange and a free input shaft end on the opposite side
Chiaravalli

CHME 075 Worm Gearbox with Motor Flange and Free Input Shaft (Ø28 mm output shaft)

Worm Gearboxes

CHME 075 — the CHM worm gearbox with its IEC motor flange plus a free input shaft end on the opposite side — for a hand wheel, an encoder, a brake or a second drive on the input. 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.

Supplied without motor. Fits IEC 71 or 80 or 90 or 100 motors (B5 or B14 flange as the CHM 075).

How to pick from the table: with a standard 4-pole motor (1400 r/min) the ratio sets the output speed. Choose the row whose output speed and torque match your application, then the flange that matches your motor. The Motor column lists the motors that fit that row — pick yours and the output torque and service factor update to match. More in the Selection Guide tab below.

Product Configuration

Select a row to add it to your quote

CHME 075: ratings as the CHM 075 at 1400 r/min input; the free input shaft end is Ø24 j6 × 50 mm.

CodeRatioMotor flangeMotorOutput speedOutput torqueService factor
CHME-075 R.7.5 90F24 7.5:1 IEC 90 · 24 mm shaft 1.85 kW 186.7 r/min 83 Nm 2.16
CHME-075 R.7.5 100F28 7.5:1 IEC 100 · 28 mm shaft 3 kW 186.7 r/min 135 Nm 1.33
CHME-075 R.10 90F24 10:1 IEC 90 · 24 mm shaft 1.85 kW 140 r/min 110 Nm 1.73
CHME-075 R.10 100F28 10:1 IEC 100 · 28 mm shaft 3 kW 140 r/min 178 Nm 1.07
CHME-075 R.15 90F24 15:1 IEC 90 · 24 mm shaft 1.85 kW 93.3 r/min 160 Nm 1.3
CHME-075 R.15 100F28 15:1 IEC 100 · 28 mm shaft 2.2 kW 93.3 r/min 191 Nm 1.09
CHME-075 R.20 80F19 20:1 IEC 80 · 19 mm shaft 1.1 kW 70 r/min 122 Nm 1.64
CHME-075 R.20 90F24 20:1 IEC 90 · 24 mm shaft 1.5 kW 70 r/min 167 Nm 1.2
CHME-075 R.25 80F19 25:1 IEC 80 · 19 mm shaft 1.1 kW 56 r/min 150 Nm 1.36
CHME-075 R.25 90F24 25:1 IEC 90 · 24 mm shaft 1.5 kW 56 r/min 204 Nm 1
CHME-075 R.30 80F19 30:1 IEC 80 · 19 mm shaft 1.1 kW 46.7 r/min 170 Nm 1.36
CHME-075 R.30 90F24 30:1 IEC 90 · 24 mm shaft 1.5 kW 46.7 r/min 232 Nm 1
CHME-075 R.40 80F19 40:1 IEC 80 · 19 mm shaft 1.1 kW 35 r/min 214 Nm 1
CHME-075 R.40 90F24 40:1 IEC 90 · 24 mm shaft 1.1 kW 35 r/min 214 Nm 1
CHME-075 R.50 71F14 50:1 IEC 71 · 14 mm shaft 0.55 kW 28 r/min 129 Nm 1.64
CHME-075 R.50 80F19 50:1 IEC 80 · 19 mm shaft 0.75 kW 28 r/min 176 Nm 1.2
CHME-075 R.50 90F24 50:1 IEC 90 · 24 mm shaft 0.75 kW 28 r/min 176 Nm 1.2
CHME-075 R.60 71F14 60:1 IEC 71 · 14 mm shaft 0.55 kW 23.3 r/min 146 Nm 1.36
CHME-075 R.60 80F19 60:1 IEC 80 · 19 mm shaft 0.75 kW 23.3 r/min 199 Nm 1
CHME-075 R.80 71F14 80:1 IEC 71 · 14 mm shaft 0.55 kW 17.5 r/min 178 Nm 1.1
CHME-075 R.80 80F19 80:1 IEC 80 · 19 mm shaft 0.55 kW 17.5 r/min 178 Nm 1.1
CHME-075 R.100 71F14 100:1 IEC 71 · 14 mm shaft 0.37 kW 14 r/min 137 Nm 1.34
CHME-075 R.100 80F19 100:1 IEC 80 · 19 mm shaft 0.37 kW 14 r/min 137 Nm 1.34

Product Information

Motor pole count

All table figures assume a 4-pole motor (1400 r/min input) — the standard choice for most applications. A 2-pole motor (2800 r/min) doubles the output speed and a 6-pole motor (900 r/min) reduces it, and the power and torque ratings change with them — if you're running anything other than 4-pole, contact us and we'll size it for you.

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.

If the service factor turns red after you pick a motor, that combination is below 1.0 — the motor can overload the gearbox in continuous use. It may be acceptable for light, intermittent duty, but for anything continuous choose a smaller motor, a different ratio, or the next gearbox size up — or ask us and we'll size it with you.

Need help specifying this product?

Our technical team can help you specify the right component. Add it to your quote basket above, or contact us directly.

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