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Chiaravalli CHME 050 worm gearbox with a motor flange and a free input shaft end on the opposite side
Chiaravalli

CHME 050 Worm Gearbox with Motor Flange and Free Input Shaft (Ø25 mm output shaft)

Worm Gearboxes

CHME 050 — 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 25 mm bore, keyed; optional output flanges (the F executions on the dimension drawing). Input shaft Ø14 j6 × 30 mm with M6 centre thread, key 5 mm (dimensions on the input-shaft sheet; everything else as the CHM 050). Supplied in the universal position — it can be mounted in any orientation. Filled for life with synthetic oil — no oil changes, no maintenance.

Supplied without motor. Fits IEC 63 or 71 or 80 motors (B5 or B14 flange as the CHM 050).

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 050: ratings as the CHM 050 at 1400 r/min input; the free input shaft end is Ø14 j6 × 30 mm.

CodeRatioMotor flangeMotorOutput speedOutput torqueService factor
CHME-050 R.7.5 71F14 7.5:1 IEC 71 · 14 mm shaft 0.55 kW 186.7 r/min 24 Nm 2.73
CHME-050 R.7.5 80F19 7.5:1 IEC 80 · 19 mm shaft 1.1 kW 186.7 r/min 49 Nm 1.36
CHME-050 R.10 71F14 10:1 IEC 71 · 14 mm shaft 0.55 kW 140 r/min 32 Nm 2.18
CHME-050 R.10 80F19 10:1 IEC 80 · 19 mm shaft 1.1 kW 140 r/min 64 Nm 1.09
CHME-050 R.15 71F14 15:1 IEC 71 · 14 mm shaft 0.55 kW 93.3 r/min 46 Nm 1.64
CHME-050 R.15 80F19 15:1 IEC 80 · 19 mm shaft 0.75 kW 93.3 r/min 63 Nm 1.2
CHME-050 R.20 71F14 20:1 IEC 71 · 14 mm shaft 0.55 kW 70 r/min 59 Nm 1.23
CHME-050 R.20 80F19 20:1 IEC 80 · 19 mm shaft 0.55 kW 70 r/min 59 Nm 1.23
CHME-050 R.25 71F14 25:1 IEC 71 · 14 mm shaft 0.55 kW 56 r/min 70 Nm 1
CHME-050 R.25 80F19 25:1 IEC 80 · 19 mm shaft 0.55 kW 56 r/min 70 Nm 1
CHME-050 R.30 71F14 30:1 IEC 71 · 14 mm shaft 0.55 kW 46.7 r/min 80 Nm 1
CHME-050 R.30 80F19 30:1 IEC 80 · 19 mm shaft 0.55 kW 46.7 r/min 80 Nm 1
CHME-050 R.40 63F11 40:1 IEC 63 · 11 mm shaft 0.25 kW 35 r/min 45 Nm 1.63
CHME-050 R.40 71F14 40:1 IEC 71 · 14 mm shaft 0.37 kW 35 r/min 67 Nm 1.1
CHME-050 R.40 80F19 40:1 IEC 80 · 19 mm shaft 0.37 kW 35 r/min 67 Nm 1.1
CHME-050 R.50 63F11 50:1 IEC 63 · 11 mm shaft 0.25 kW 28 r/min 53 Nm 1.33
CHME-050 R.50 71F14 50:1 IEC 71 · 14 mm shaft 0.25 kW 28 r/min 53 Nm 1.33
CHME-050 R.60 63F11 60:1 IEC 63 · 11 mm shaft 0.25 kW 23.3 r/min 59 Nm 1.18
CHME-050 R.60 71F14 60:1 IEC 71 · 14 mm shaft 0.25 kW 23.3 r/min 59 Nm 1.18
CHME-050 R.80 63F11 80:1 IEC 63 · 11 mm shaft 0.18 kW 17.5 r/min 50 Nm 1.25
CHME-050 R.80 71F14 80:1 IEC 71 · 14 mm shaft 0.18 kW 17.5 r/min 50 Nm 1.25
CHME-050 R.100 63F11 100:1 IEC 63 · 11 mm shaft 0.12 kW 14 r/min 39 Nm 1.35
CHME-050 R.100 71F14 100:1 IEC 71 · 14 mm shaft 0.12 kW 14 r/min 39 Nm 1.35

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.

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