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Chiaravalli CH-G A 501 helical gear unit (chiaravalli.com product image)
Chiaravalli

CH-G A 501 Helical Gear Unit (Ø38 mm output shaft)

Cast Iron Gearboxes CH-G

CH-G A 501 helical in-line gear unit — Chiaravalli's cast iron series: single-stage, size 50, ratios 1.32:1 to 8.56:1. 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 Ø38 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 80, 90, 100, 112, 132 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 1.32:1 gives 1061 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, 6 to 22.14 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. 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

CodeRatioMotor flangeMotorOutput speedOutput torqueService factor Weight
CH-G A501 1.32 PAM132 1.32:1 IEC 132 · 38 mm shaft 7.5 kW 1057.1 r/min 68 Nm 2.95 27.0 kg
CH-G A501 1.46 PAM132 1.46:1 IEC 132 · 38 mm shaft 7.5 kW 960.8 r/min 75 Nm 2.95 27.0 kg
CH-G A501 1.97 PAM132 1.97:1 IEC 132 · 38 mm shaft 7.5 kW 712.3 r/min 101 Nm 2.29 27.0 kg
CH-G A501 2.58 PAM100 2.58:1 IEC 100 · 28 mm shaft 3 kW 541.9 r/min 53 Nm 5.3 25.0 kg
CH-G A501 2.58 PAM112 2.58:1 IEC 112 · 28 mm shaft 5.5 kW 541.9 r/min 97 Nm 2.89 25.0 kg
CH-G A501 2.58 PAM132 2.58:1 IEC 132 · 38 mm shaft 7.5 kW 541.9 r/min 132 Nm 2.12 27.0 kg
CH-G A501 3.3 PAM100 3.3:1 IEC 100 · 28 mm shaft 3 kW 424.2 r/min 68 Nm 4.59 25.0 kg
CH-G A501 3.3 PAM112 3.3:1 IEC 112 · 28 mm shaft 5.5 kW 424.2 r/min 124 Nm 2.5 25.0 kg
CH-G A501 3.3 PAM132 3.3:1 IEC 132 · 38 mm shaft 7.5 kW 424.2 r/min 169 Nm 1.84 27.0 kg
CH-G A501 3.78 PAM100 3.78:1 IEC 100 · 28 mm shaft 3 kW 370.6 r/min 77 Nm 4.01 25.0 kg
CH-G A501 3.78 PAM112 3.78:1 IEC 112 · 28 mm shaft 5.5 kW 370.6 r/min 142 Nm 2.19 25.0 kg
CH-G A501 3.78 PAM132 3.78:1 IEC 132 · 38 mm shaft 7.5 kW 370.6 r/min 193 Nm 1.6 27.0 kg
CH-G A501 4.06 PAM100 4.06:1 IEC 100 · 28 mm shaft 3 kW 344.9 r/min 83 Nm 3.85 25.0 kg
CH-G A501 4.06 PAM112 4.06:1 IEC 112 · 28 mm shaft 5.5 kW 344.9 r/min 152 Nm 2.1 25.0 kg
CH-G A501 4.06 PAM132 4.06:1 IEC 132 · 38 mm shaft 7.5 kW 344.9 r/min 208 Nm 1.54 27.0 kg
CH-G A501 4.73 PAM100 4.73:1 IEC 100 · 28 mm shaft 3 kW 295.8 r/min 97 Nm 3.3 25.0 kg
CH-G A501 4.73 PAM112 4.73:1 IEC 112 · 28 mm shaft 5.5 kW 295.8 r/min 178 Nm 1.8 25.0 kg
CH-G A501 4.73 PAM132 4.73:1 IEC 132 · 38 mm shaft 7.5 kW 295.8 r/min 242 Nm 1.32 27.0 kg
CH-G A501 5.62 PAM80 5.62:1 IEC 80 · 19 mm shaft 1.1 kW 249.3 r/min 42 Nm 7.84 22.0 kg
CH-G A501 5.62 PAM90 5.62:1 IEC 90 · 24 mm shaft 2.2 kW 249.3 r/min 84 Nm 3.92 22.0 kg
CH-G A501 5.62 PAM100 5.62:1 IEC 100 · 28 mm shaft 3 kW 249.3 r/min 115 Nm 2.87 25.0 kg
CH-G A501 5.62 PAM112 5.62:1 IEC 112 · 28 mm shaft 5.5 kW 249.3 r/min 211 Nm 1.57 25.0 kg
CH-G A501 5.62 PAM132 5.62:1 IEC 132 · 38 mm shaft 7.5 kW 249.3 r/min 287 Nm 1.15 27.0 kg
CH-G A501 6.17 PAM80 6.17:1 IEC 80 · 19 mm shaft 1.1 kW 227 r/min 46 Nm 7.35 22.0 kg
CH-G A501 6.17 PAM90 6.17:1 IEC 90 · 24 mm shaft 2.2 kW 227 r/min 93 Nm 3.67 22.0 kg
CH-G A501 6.17 PAM100 6.17:1 IEC 100 · 28 mm shaft 3 kW 227 r/min 126 Nm 2.69 25.0 kg
CH-G A501 6.17 PAM112 6.17:1 IEC 112 · 28 mm shaft 5.5 kW 227 r/min 231 Nm 1.47 25.0 kg
CH-G A501 6.17 PAM132 6.17:1 IEC 132 · 38 mm shaft 7.5 kW 227 r/min 316 Nm 1.08 27.0 kg
CH-G A501 7.6 PAM80 7.6:1 IEC 80 · 19 mm shaft 1.1 kW 184.2 r/min 57 Nm 6.14 22.0 kg
CH-G A501 7.6 PAM90 7.6:1 IEC 90 · 24 mm shaft 2.2 kW 184.2 r/min 114 Nm 3.07 22.0 kg
CH-G A501 7.6 PAM100 7.6:1 IEC 100 · 28 mm shaft 3 kW 184.2 r/min 156 Nm 2.25 25.0 kg
CH-G A501 7.6 PAM112 7.6:1 IEC 112 · 28 mm shaft 5.5 kW 184.2 r/min 285 Nm 1.23 25.0 kg
CH-G A501 7.6 PAM132 7.6:1 IEC 132 · 38 mm shaft 5.5 kW 184.2 r/min 285 Nm 1.23 27.0 kg
CH-G A501 8.56 PAM80 8.56:1 IEC 80 · 19 mm shaft 1.1 kW 163.6 r/min 64 Nm 5.45 22.0 kg
CH-G A501 8.56 PAM90 8.56:1 IEC 90 · 24 mm shaft 2.2 kW 163.6 r/min 128 Nm 2.73 22.0 kg
CH-G A501 8.56 PAM100 8.56:1 IEC 100 · 28 mm shaft 3 kW 163.6 r/min 175 Nm 2 25.0 kg
CH-G A501 8.56 PAM112 8.56:1 IEC 112 · 28 mm shaft 5.5 kW 163.6 r/min 321 Nm 1.09 25.0 kg
CH-G A501 8.56 PAM132 8.56:1 IEC 132 · 38 mm shaft 5.5 kW 163.6 r/min 321 Nm 1.09 27.0 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.

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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