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Chiaravalli CHRE 04 worm gearbox with an input shaft on both sides and no motor flange
Chiaravalli

CHRE 04 Worm Gearbox with Double Input Shaft (Ø18 mm output shaft)

Worm Gearboxes

CHRE 04 — the CH worm gearbox with a free input shaft on both sides and no motor flange — for drives that take power in on one side and pass it through on the other. Aluminium housing, hollow output shaft with 18 mm bore, keyed; foot mounting with the A (feet) body as the catalogue's CHR/CHRE drawings — the ..P flange-output execution is available too. Input shaft Ø11 h6 × 30 mm, output 18 H7 hollow bore with 6 mm keyway (body and shaft dimensions on the CHR/CHRE sheet; everything else as the CH 04). Filled for life with synthetic oil — no oil changes, no maintenance; aluminium housing.

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

CHRE 04: ratings as the CH 04 at 1400 r/min input; input shaft Ø11 h6 × 30 mm.

CodeRatioOutput speedInput power P1Output torqueService factor
CHRE-04 R.7 7:1 200 r/min 0.55 kW 22 Nm 1.4
CHRE-04 R.10 10:1 140 r/min 0.55 kW 30 Nm 1
CHRE-04 R.14 14:1 100 r/min 0.37 kW 29 Nm 1
CHRE-04 R.20 20:1 70 r/min 0.37 kW 38 Nm 1
CHRE-04 R.28 28:1 50 r/min 0.37 kW 40 Nm 0.9
CHRE-04 R.35 35:1 40 r/min 0.25 kW 41 Nm 0.9
CHRE-04 R.46 46:1 30 r/min 0.18 kW 37 Nm 1
CHRE-04 R.60 60:1 23 r/min 0.18 kW 37 Nm 0.9
CHRE-04 R.70 70:1 20 r/min 0.12 kW 33 Nm 0.9
CHRE-04 R.100 100:1 14 r/min 0.12 kW 30 Nm 0.9

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.

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