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Chiaravalli CH-G D 353 shaft mounted gear unit (chiaravalli.com product image)
Chiaravalli

CH-G D 353 Shaft Mounted Gear Unit (Ø35 mm hollow output shaft)

Cast Iron Gearboxes CH-G

CH-G D 353 parallel shaft mounted gear unit — Chiaravalli's cast iron series: three-stage, size 35, ratios 81.25:1 to 267.38:1. Hollow output shaft Ø35 mm H7 (D version; the M version has a solid shaft). Made to order: the catalogue lists every D/M version (B14 or B5 flange, KS shrink disc, LT rubber buffer, Ç fixing element, M solid shaft) as available on request — ask us for the lead time. Backstop device available on request (specify the free direction of rotation). PAM motor input for IEC 71, 80, 90 motors.

Supplied without motor. You are choosing the gear unit with its PAM motor adapter — ask us to quote a suitable motor together with it if you'd like both.

How to pick from the table: with a standard 4-pole motor (1400 r/min) the ratio sets the output speed — e.g. ratio 267.38:1 gives 5 r/min at the output shaft. Each row shows the catalogue's maximum output torque (M2max at service factor 1) and the largest 4-pole motor that reaches it (P1max, 0.34 to 1.13 kW on this size). Choose the row whose output speed and torque match your application, then the flange that matches your motor (the frame size is on the motor's nameplate — only the frames the catalogue lists for that ratio are offered). The Motor column lists the 4-pole motors that fit that flange — pick yours and the output torque and service factor update to match. FR1 / FR2 are the permissible radial loads on the input and output shafts. More in the Selection Guide tab below.

Mounting position M1 is standard — specify yours when ordering (see the mounting-positions image). Cast iron housing.

Product Configuration

Select a row to add it to your quote

Code RatioMotor flangeMotorOutput speedOutput torqueService factorRadial load FR1Radial load FR2GRRadial load FR2 Weight
CH-G D353 267.38 PAM71 267.38:1 IEC 71 · 14 mm shaft 0.25 kW 5.2 r/min 441 Nm 1.36 1.4 kN 10 kN 4 kN 24.0 kg
CH-G D353 217.97 PAM71 217.97:1 IEC 71 · 14 mm shaft 0.37 kW 6.4 r/min 529 Nm 1.14 1.3 kN 10 kN 4 kN 24.0 kg
CH-G D353 185.05 PAM71 185.05:1 IEC 71 · 14 mm shaft 0.37 kW 7.6 r/min 444 Nm 1.35 1.3 kN 10 kN 4 kN 24.0 kg
CH-G D353 185.05 PAM80 185.05:1 IEC 80 · 19 mm shaft 0.55 kW 7.6 r/min 660 Nm 0.91 1.3 kN 10 kN 4 kN 25.0 kg
CH-G D353 185.05 PAM90 185.05:1 IEC 90 · 24 mm shaft 1.1 kW 7.6 r/min 1320 Nm 0.45 1.3 kN 10 kN 4 kN 25.0 kg
CH-G D353 150.85 PAM71 150.85:1 IEC 71 · 14 mm shaft 0.55 kW 9.3 r/min 541 Nm 1.11 1.3 kN 10 kN 4 kN 24.0 kg
CH-G D353 150.85 PAM80 150.85:1 IEC 80 · 19 mm shaft 0.55 kW 9.3 r/min 541 Nm 1.11 1.3 kN 10 kN 4 kN 25.0 kg
CH-G D353 150.85 PAM90 150.85:1 IEC 90 · 24 mm shaft 1.1 kW 9.3 r/min 1082 Nm 0.55 1.3 kN 10 kN 4 kN 25.0 kg
CH-G D353 126.43 PAM71 126.43:1 IEC 71 · 14 mm shaft 0.55 kW 11.1 r/min 452 Nm 1.33 1.3 kN 10 kN 4 kN 24.0 kg
CH-G D353 126.43 PAM80 126.43:1 IEC 80 · 19 mm shaft 0.55 kW 11.1 r/min 452 Nm 1.33 1.3 kN 10 kN 4 kN 25.0 kg
CH-G D353 126.43 PAM90 126.43:1 IEC 90 · 24 mm shaft 1.1 kW 11.1 r/min 904 Nm 0.66 1.3 kN 10 kN 4 kN 25.0 kg
CH-G D353 99.67 PAM71 99.67:1 IEC 71 · 14 mm shaft 0.55 kW 14 r/min 359 Nm 1.67 1.3 kN 10 kN 4 kN 24.0 kg
CH-G D353 99.67 PAM80 99.67:1 IEC 80 · 19 mm shaft 0.75 kW 14 r/min 489 Nm 1.23 1.3 kN 10 kN 4 kN 25.0 kg
CH-G D353 99.67 PAM90 99.67:1 IEC 90 · 24 mm shaft 1.1 kW 14 r/min 717 Nm 0.84 1.3 kN 10 kN 4 kN 25.0 kg
CH-G D353 81.25 PAM71 81.25:1 IEC 71 · 14 mm shaft 0.55 kW 17.2 r/min 292 Nm 2.05 1.2 kN 10 kN 4 kN 24.0 kg
CH-G D353 81.25 PAM80 81.25:1 IEC 80 · 19 mm shaft 1.1 kW 17.2 r/min 584 Nm 1.03 1.2 kN 10 kN 4 kN 25.0 kg
CH-G D353 81.25 PAM90 81.25:1 IEC 90 · 24 mm shaft 1.1 kW 17.2 r/min 584 Nm 1.03 1.2 kN 10 kN 4 kN 25.0 kg

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 motor asks of it: 1.0 means the gearbox works exactly at its rated limit (the catalogue's M2max); 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.

Radial loads

FR1 is the permissible radial load on the input shaft and FR2 on the output shaft (kN, applied at the shaft centre). Chain sprockets, belt pulleys and gears on the shaft all load it radially — check the figure against your drive, and ask us if your load is close to it. The catalogue also limits peak loads to 200 % of the nominal torque.

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