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Chiaravalli CH-G A 353 helical gear unit (chiaravalli.com product image)
Chiaravalli

CH-G A 353 Helical Gear Unit (Ø35 mm output shaft)

Cast Iron Gearboxes CH-G

CH-G A 353 helical in-line gear unit — Chiaravalli's cast iron series: three-stage, size 35, ratios 58.68:1 to 268:1. This is the A … / PAM version — foot mounting with the PAM motor input — the version the catalogue lists as available from stock. Solid keyed output shaft Ø35 k6. The flange-mounted F and foot-flange AF versions, the W input-shaft and IEC-coupling input versions and the FA–FD output flanges are made to order — ask us. PAM motor input for IEC 63, 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 268:1 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, 0.27 to 1.25 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 FR2 Weight
CH-G A353 268 PAM63 268:1 IEC 63 · 11 mm shaft 0.25 kW 5.2 r/min 463 Nm 1.08 1.4 kN 8 kN 20.0 kg
CH-G A353 268 PAM71 268:1 IEC 71 · 14 mm shaft 0.25 kW 5.2 r/min 463 Nm 1.08 1.4 kN 8 kN 21.0 kg
CH-G A353 216.67 PAM63 216.67:1 IEC 63 · 11 mm shaft 0.25 kW 6.5 r/min 368 Nm 1.36 1.3 kN 8 kN 20.0 kg
CH-G A353 216.67 PAM71 216.67:1 IEC 71 · 14 mm shaft 0.25 kW 6.5 r/min 368 Nm 1.36 1.3 kN 8 kN 21.0 kg
CH-G A353 194.72 PAM63 194.72:1 IEC 63 · 11 mm shaft 0.25 kW 7.2 r/min 329 Nm 1.52 1.3 kN 8 kN 20.0 kg
CH-G A353 194.72 PAM71 194.72:1 IEC 71 · 14 mm shaft 0.37 kW 7.2 r/min 487 Nm 1.03 1.3 kN 8 kN 21.0 kg
CH-G A353 157.42 PAM63 157.42:1 IEC 63 · 11 mm shaft 0.25 kW 8.9 r/min 266 Nm 1.88 1.3 kN 8 kN 20.0 kg
CH-G A353 157.42 PAM71 157.42:1 IEC 71 · 14 mm shaft 0.37 kW 8.9 r/min 394 Nm 1.27 1.3 kN 8 kN 21.0 kg
CH-G A353 134.76 PAM63 134.76:1 IEC 63 · 11 mm shaft 0.25 kW 10.4 r/min 231 Nm 2.16 1.3 kN 8 kN 20.0 kg
CH-G A353 134.76 PAM71 134.76:1 IEC 71 · 14 mm shaft 0.37 kW 10.4 r/min 343 Nm 1.46 1.3 kN 8 kN 21.0 kg
CH-G A353 134.76 PAM80 134.76:1 IEC 80 · 19 mm shaft 0.55 kW 10.4 r/min 509 Nm 0.98 1.3 kN 8 kN 22.0 kg
CH-G A353 134.76 PAM90 134.76:1 IEC 90 · 24 mm shaft 1.1 kW 10.4 r/min 1019 Nm 0.49 1.3 kN 8 kN 22.0 kg
CH-G A353 108.95 PAM63 108.95:1 IEC 63 · 11 mm shaft 0.25 kW 12.9 r/min 187 Nm 2.68 1.3 kN 8 kN 20.0 kg
CH-G A353 108.95 PAM71 108.95:1 IEC 71 · 14 mm shaft 0.55 kW 12.9 r/min 410 Nm 1.22 1.3 kN 8 kN 21.0 kg
CH-G A353 108.95 PAM80 108.95:1 IEC 80 · 19 mm shaft 0.55 kW 12.9 r/min 410 Nm 1.22 1.3 kN 8 kN 22.0 kg
CH-G A353 108.95 PAM90 108.95:1 IEC 90 · 24 mm shaft 1.1 kW 12.9 r/min 821 Nm 0.61 1.3 kN 8 kN 22.0 kg
CH-G A353 90.51 PAM63 90.51:1 IEC 63 · 11 mm shaft 0.25 kW 15.5 r/min 154 Nm 3.24 1.3 kN 8 kN 20.0 kg
CH-G A353 90.51 PAM71 90.51:1 IEC 71 · 14 mm shaft 0.55 kW 15.5 r/min 340 Nm 1.47 1.3 kN 8 kN 21.0 kg
CH-G A353 90.51 PAM80 90.51:1 IEC 80 · 19 mm shaft 0.75 kW 15.5 r/min 463 Nm 1.08 1.3 kN 8 kN 22.0 kg
CH-G A353 90.51 PAM90 90.51:1 IEC 90 · 24 mm shaft 1.1 kW 15.5 r/min 679 Nm 0.74 1.3 kN 8 kN 22.0 kg
CH-G A353 72.58 PAM63 72.58:1 IEC 63 · 11 mm shaft 0.25 kW 19.3 r/min 124 Nm 4.04 1.2 kN 8 kN 20.0 kg
CH-G A353 72.58 PAM71 72.58:1 IEC 71 · 14 mm shaft 0.55 kW 19.3 r/min 272 Nm 1.84 1.2 kN 8 kN 21.0 kg
CH-G A353 72.58 PAM80 72.58:1 IEC 80 · 19 mm shaft 0.75 kW 19.3 r/min 371 Nm 1.35 1.2 kN 8 kN 22.0 kg
CH-G A353 72.58 PAM90 72.58:1 IEC 90 · 24 mm shaft 1.1 kW 19.3 r/min 545 Nm 0.92 1.2 kN 8 kN 22.0 kg
CH-G A353 58.68 PAM63 58.68:1 IEC 63 · 11 mm shaft 0.25 kW 23.9 r/min 100 Nm 5 1.2 kN 8 kN 20.0 kg
CH-G A353 58.68 PAM71 58.68:1 IEC 71 · 14 mm shaft 0.55 kW 23.9 r/min 220 Nm 2.27 1.2 kN 8 kN 21.0 kg
CH-G A353 58.68 PAM80 58.68:1 IEC 80 · 19 mm shaft 1.1 kW 23.9 r/min 440 Nm 1.14 1.2 kN 8 kN 22.0 kg
CH-G A353 58.68 PAM90 58.68:1 IEC 90 · 24 mm shaft 1.1 kW 23.9 r/min 440 Nm 1.14 1.2 kN 8 kN 22.0 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.

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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