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Chiaravalli CH-G A 403 helical gear unit (chiaravalli.com product image)
Chiaravalli

CH-G A 403 Helical Gear Unit (Ø40 mm output shaft)

Cast Iron Gearboxes CH-G

CH-G A 403 helical in-line gear unit — Chiaravalli's cast iron series: three-stage, size 40, ratios 49.64:1 to 267.75:1. 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 Ø40 k6 (Ø35 k6 option). 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 71, 80, 90, 100, 112 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 267.75:1 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, 0.47 to 2.51 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 A403 267.75 PAM71 267.75:1 IEC 71 · 14 mm shaft 0.37 kW 5.2 r/min 669 Nm 1.27 2.8 kN 12 kN 32.0 kg
CH-G A403 267.75 PAM80 267.75:1 IEC 80 · 19 mm shaft 0.55 kW 5.2 r/min 995 Nm 0.85 2.8 kN 12 kN 35.0 kg
CH-G A403 267.75 PAM90 267.75:1 IEC 90 · 24 mm shaft 1.1 kW 5.2 r/min 1989 Nm 0.43 2.8 kN 12 kN 35.0 kg
CH-G A403 234.5 PAM71 234.5:1 IEC 71 · 14 mm shaft 0.37 kW 6 r/min 593 Nm 1.43 2.8 kN 12 kN 32.0 kg
CH-G A403 234.5 PAM80 234.5:1 IEC 80 · 19 mm shaft 0.55 kW 6 r/min 882 Nm 0.96 2.8 kN 12 kN 35.0 kg
CH-G A403 234.5 PAM90 234.5:1 IEC 90 · 24 mm shaft 1.1 kW 6 r/min 1764 Nm 0.48 2.8 kN 12 kN 35.0 kg
CH-G A403 215.01 PAM71 215.01:1 IEC 71 · 14 mm shaft 0.55 kW 6.5 r/min 806 Nm 1.05 2.8 kN 12 kN 32.0 kg
CH-G A403 215.01 PAM80 215.01:1 IEC 80 · 19 mm shaft 0.55 kW 6.5 r/min 806 Nm 1.05 2.8 kN 12 kN 35.0 kg
CH-G A403 215.01 PAM90 215.01:1 IEC 90 · 24 mm shaft 1.1 kW 6.5 r/min 1612 Nm 0.53 2.8 kN 12 kN 35.0 kg
CH-G A403 186.14 PAM71 186.14:1 IEC 71 · 14 mm shaft 0.55 kW 7.5 r/min 698 Nm 1.22 2.7 kN 12 kN 32.0 kg
CH-G A403 186.14 PAM80 186.14:1 IEC 80 · 19 mm shaft 0.55 kW 7.5 r/min 698 Nm 1.22 2.7 kN 12 kN 35.0 kg
CH-G A403 186.14 PAM90 186.14:1 IEC 90 · 24 mm shaft 1.1 kW 7.5 r/min 1396 Nm 0.61 2.7 kN 12 kN 35.0 kg
CH-G A403 186.14 PAM100 186.14:1 IEC 100 · 28 mm shaft 2.2 kW 7.5 r/min 2791 Nm 0.3 2.7 kN 12 kN 37.0 kg
CH-G A403 186.14 PAM112 186.14:1 IEC 112 · 28 mm shaft 4 kW 7.5 r/min 5075 Nm 0.17 2.7 kN 12 kN 37.0 kg
CH-G A403 170.55 PAM71 170.55:1 IEC 71 · 14 mm shaft 0.55 kW 8.2 r/min 640 Nm 1.33 2.7 kN 12 kN 32.0 kg
CH-G A403 170.55 PAM80 170.55:1 IEC 80 · 19 mm shaft 0.55 kW 8.2 r/min 640 Nm 1.33 2.7 kN 12 kN 35.0 kg
CH-G A403 170.55 PAM90 170.55:1 IEC 90 · 24 mm shaft 1.1 kW 8.2 r/min 1281 Nm 0.66 2.7 kN 12 kN 35.0 kg
CH-G A403 149.47 PAM71 149.47:1 IEC 71 · 14 mm shaft 0.55 kW 9.4 r/min 563 Nm 1.51 2.7 kN 12 kN 32.0 kg
CH-G A403 149.47 PAM80 149.47:1 IEC 80 · 19 mm shaft 0.75 kW 9.4 r/min 768 Nm 1.11 2.7 kN 12 kN 35.0 kg
CH-G A403 149.47 PAM90 149.47:1 IEC 90 · 24 mm shaft 1.1 kW 9.4 r/min 1127 Nm 0.75 2.7 kN 12 kN 35.0 kg
CH-G A403 149.47 PAM100 149.47:1 IEC 100 · 28 mm shaft 2.2 kW 9.4 r/min 2253 Nm 0.38 2.7 kN 12 kN 37.0 kg
CH-G A403 149.47 PAM112 149.47:1 IEC 112 · 28 mm shaft 4 kW 9.4 r/min 4096 Nm 0.21 2.7 kN 12 kN 37.0 kg
CH-G A403 135.37 PAM71 135.37:1 IEC 71 · 14 mm shaft 0.55 kW 10.3 r/min 508 Nm 1.67 2.7 kN 12 kN 32.0 kg
CH-G A403 135.37 PAM80 135.37:1 IEC 80 · 19 mm shaft 0.75 kW 10.3 r/min 693 Nm 1.23 2.7 kN 12 kN 35.0 kg
CH-G A403 135.37 PAM90 135.37:1 IEC 90 · 24 mm shaft 1.1 kW 10.3 r/min 1016 Nm 0.84 2.7 kN 12 kN 35.0 kg
CH-G A403 135.37 PAM100 135.37:1 IEC 100 · 28 mm shaft 2.2 kW 10.3 r/min 2033 Nm 0.42 2.7 kN 12 kN 37.0 kg
CH-G A403 135.37 PAM112 135.37:1 IEC 112 · 28 mm shaft 4 kW 10.3 r/min 3696 Nm 0.23 2.7 kN 12 kN 37.0 kg
CH-G A403 118.13 PAM71 118.13:1 IEC 71 · 14 mm shaft 0.55 kW 11.9 r/min 445 Nm 1.91 2.7 kN 12 kN 32.0 kg
CH-G A403 118.13 PAM80 118.13:1 IEC 80 · 19 mm shaft 0.75 kW 11.9 r/min 607 Nm 1.4 2.7 kN 12 kN 35.0 kg
CH-G A403 118.13 PAM90 118.13:1 IEC 90 · 24 mm shaft 1.1 kW 11.9 r/min 890 Nm 0.95 2.7 kN 12 kN 35.0 kg
CH-G A403 118.13 PAM100 118.13:1 IEC 100 · 28 mm shaft 2.2 kW 11.9 r/min 1781 Nm 0.48 2.7 kN 12 kN 37.0 kg
CH-G A403 118.13 PAM112 118.13:1 IEC 112 · 28 mm shaft 4 kW 11.9 r/min 3238 Nm 0.26 2.7 kN 12 kN 37.0 kg
CH-G A403 94.86 PAM71 94.86:1 IEC 71 · 14 mm shaft 0.55 kW 14.8 r/min 357 Nm 2.38 2.7 kN 12 kN 32.0 kg
CH-G A403 94.86 PAM80 94.86:1 IEC 80 · 19 mm shaft 1.1 kW 14.8 r/min 714 Nm 1.19 2.7 kN 12 kN 35.0 kg
CH-G A403 94.86 PAM90 94.86:1 IEC 90 · 24 mm shaft 1.1 kW 14.8 r/min 714 Nm 1.19 2.7 kN 12 kN 35.0 kg
CH-G A403 94.86 PAM100 94.86:1 IEC 100 · 28 mm shaft 2.2 kW 14.8 r/min 1427 Nm 0.6 2.7 kN 12 kN 37.0 kg
CH-G A403 94.86 PAM112 94.86:1 IEC 112 · 28 mm shaft 4 kW 14.8 r/min 2595 Nm 0.33 2.7 kN 12 kN 37.0 kg
CH-G A403 85.91 PAM71 85.91:1 IEC 71 · 14 mm shaft 0.55 kW 16.3 r/min 322 Nm 2.64 2.6 kN 12 kN 32.0 kg
CH-G A403 85.91 PAM80 85.91:1 IEC 80 · 19 mm shaft 1.1 kW 16.3 r/min 645 Nm 1.32 2.6 kN 12 kN 35.0 kg
CH-G A403 85.91 PAM90 85.91:1 IEC 90 · 24 mm shaft 1.1 kW 16.3 r/min 645 Nm 1.32 2.6 kN 12 kN 35.0 kg
CH-G A403 85.91 PAM100 85.91:1 IEC 100 · 28 mm shaft 2.2 kW 16.3 r/min 1290 Nm 0.66 2.6 kN 12 kN 37.0 kg
CH-G A403 85.91 PAM112 85.91:1 IEC 112 · 28 mm shaft 4 kW 16.3 r/min 2345 Nm 0.36 2.6 kN 12 kN 37.0 kg
CH-G A403 68.25 PAM80 68.25:1 IEC 80 · 19 mm shaft 1.1 kW 20.5 r/min 511 Nm 1.66 2.6 kN 12 kN 35.0 kg
CH-G A403 68.25 PAM90 68.25:1 IEC 90 · 24 mm shaft 1.5 kW 20.5 r/min 697 Nm 1.22 2.6 kN 12 kN 35.0 kg
CH-G A403 68.25 PAM100 68.25:1 IEC 100 · 28 mm shaft 2.2 kW 20.5 r/min 1022 Nm 0.83 2.6 kN 12 kN 37.0 kg
CH-G A403 68.25 PAM112 68.25:1 IEC 112 · 28 mm shaft 4 kW 20.5 r/min 1858 Nm 0.46 2.6 kN 12 kN 37.0 kg
CH-G A403 54.81 PAM80 54.81:1 IEC 80 · 19 mm shaft 1.1 kW 25.5 r/min 412 Nm 2.06 2.5 kN 12 kN 35.0 kg
CH-G A403 54.81 PAM90 54.81:1 IEC 90 · 24 mm shaft 2.2 kW 25.5 r/min 824 Nm 1.03 2.5 kN 12 kN 35.0 kg
CH-G A403 54.81 PAM100 54.81:1 IEC 100 · 28 mm shaft 2.2 kW 25.5 r/min 824 Nm 1.03 2.5 kN 12 kN 37.0 kg
CH-G A403 54.81 PAM112 54.81:1 IEC 112 · 28 mm shaft 4 kW 25.5 r/min 1498 Nm 0.57 2.5 kN 12 kN 37.0 kg
CH-G A403 49.64 PAM80 49.64:1 IEC 80 · 19 mm shaft 1.1 kW 28.2 r/min 373 Nm 2.28 2.5 kN 12 kN 35.0 kg
CH-G A403 49.64 PAM90 49.64:1 IEC 90 · 24 mm shaft 2.2 kW 28.2 r/min 745 Nm 1.14 2.5 kN 12 kN 35.0 kg
CH-G A403 49.64 PAM100 49.64:1 IEC 100 · 28 mm shaft 2.2 kW 28.2 r/min 745 Nm 1.14 2.5 kN 12 kN 37.0 kg
CH-G A403 49.64 PAM112 49.64:1 IEC 112 · 28 mm shaft 4 kW 28.2 r/min 1355 Nm 0.63 2.5 kN 12 kN 37.0 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?

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