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Chiaravalli CH-G A 902 helical gear unit (chiaravalli.com product image)
Chiaravalli

CH-G A 902 Helical Gear Unit (Ø90 mm output shaft)

Cast Iron Gearboxes CH-G

CH-G A 902 helical in-line gear unit — Chiaravalli's cast iron series: two-stage, size 90, ratios 5.16:1 to 42.47:1. 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 Ø90 m6. 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 160, 180, 200, 225 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 42.47:1 gives 33 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, 27.61 to 130.69 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 A902 42.47 PAM160 42.47:1 IEC 160 · 42 mm shaft 15 kW 33 r/min 4346 Nm 1.84 5.1 kN 42.3 kN 190.0 kg
CH-G A902 42.47 PAM180 42.47:1 IEC 180 · 48 mm shaft 22 kW 33 r/min 6375 Nm 1.25 5.1 kN 42.3 kN 190.0 kg
CH-G A902 42.47 PAM200 42.47:1 IEC 200 · 55 mm shaft 30 kW 33 r/min 8693 Nm 0.92 5.1 kN 42.3 kN 205.0 kg
CH-G A902 42.47 PAM225 42.47:1 IEC 225 · 60 mm shaft 37 kW 33 r/min 10721 Nm 0.75 5.1 kN 42.3 kN 208.0 kg
CH-G A902 38.33 PAM160 38.33:1 IEC 160 · 42 mm shaft 15 kW 36.5 r/min 3922 Nm 2.04 5.1 kN 40.1 kN 190.0 kg
CH-G A902 38.33 PAM180 38.33:1 IEC 180 · 48 mm shaft 22 kW 36.5 r/min 5752 Nm 1.39 5.1 kN 40.1 kN 190.0 kg
CH-G A902 38.33 PAM200 38.33:1 IEC 200 · 55 mm shaft 30 kW 36.5 r/min 7843 Nm 1.02 5.1 kN 40.1 kN 205.0 kg
CH-G A902 38.33 PAM225 38.33:1 IEC 225 · 60 mm shaft 37 kW 36.5 r/min 9673 Nm 0.83 5.1 kN 40.1 kN 208.0 kg
CH-G A902 31.81 PAM160 31.81:1 IEC 160 · 42 mm shaft 15 kW 44 r/min 3255 Nm 2.46 5.1 kN 36.3 kN 190.0 kg
CH-G A902 31.81 PAM180 31.81:1 IEC 180 · 48 mm shaft 22 kW 44 r/min 4774 Nm 1.68 5.1 kN 36.3 kN 190.0 kg
CH-G A902 31.81 PAM200 31.81:1 IEC 200 · 55 mm shaft 30 kW 44 r/min 6509 Nm 1.23 5.1 kN 36.3 kN 205.0 kg
CH-G A902 31.81 PAM225 31.81:1 IEC 225 · 60 mm shaft 37 kW 44 r/min 8028 Nm 1 5.1 kN 36.3 kN 208.0 kg
CH-G A902 26.38 PAM160 26.38:1 IEC 160 · 42 mm shaft 15 kW 53.1 r/min 2699 Nm 2.96 5.1 kN 32.3 kN 190.0 kg
CH-G A902 26.38 PAM180 26.38:1 IEC 180 · 48 mm shaft 22 kW 53.1 r/min 3959 Nm 2.02 5.1 kN 32.3 kN 190.0 kg
CH-G A902 26.38 PAM200 26.38:1 IEC 200 · 55 mm shaft 30 kW 53.1 r/min 5398 Nm 1.48 5.1 kN 32.3 kN 205.0 kg
CH-G A902 26.38 PAM225 26.38:1 IEC 225 · 60 mm shaft 37 kW 53.1 r/min 6658 Nm 1.2 5.1 kN 32.3 kN 208.0 kg
CH-G A902 23.8 PAM160 23.8:1 IEC 160 · 42 mm shaft 15 kW 58.8 r/min 2435 Nm 3.29 5.1 kN 30.8 kN 190.0 kg
CH-G A902 23.8 PAM180 23.8:1 IEC 180 · 48 mm shaft 22 kW 58.8 r/min 3571 Nm 2.24 5.1 kN 30.8 kN 190.0 kg
CH-G A902 23.8 PAM200 23.8:1 IEC 200 · 55 mm shaft 30 kW 58.8 r/min 4870 Nm 1.64 5.1 kN 30.8 kN 205.0 kg
CH-G A902 23.8 PAM225 23.8:1 IEC 225 · 60 mm shaft 45 kW 58.8 r/min 7305 Nm 1.1 5.1 kN 30.8 kN 208.0 kg
CH-G A902 19.75 PAM160 19.75:1 IEC 160 · 42 mm shaft 15 kW 70.9 r/min 2021 Nm 3.96 5.1 kN 27.5 kN 190.0 kg
CH-G A902 19.75 PAM180 19.75:1 IEC 180 · 48 mm shaft 22 kW 70.9 r/min 2964 Nm 2.7 5.1 kN 27.5 kN 190.0 kg
CH-G A902 19.75 PAM200 19.75:1 IEC 200 · 55 mm shaft 30 kW 70.9 r/min 4042 Nm 1.98 5.1 kN 27.5 kN 205.0 kg
CH-G A902 19.75 PAM225 19.75:1 IEC 225 · 60 mm shaft 45 kW 70.9 r/min 6064 Nm 1.32 5.1 kN 27.5 kN 208.0 kg
CH-G A902 17.18 PAM160 17.18:1 IEC 160 · 42 mm shaft 15 kW 81.5 r/min 1758 Nm 4.49 5.1 kN 25.5 kN 190.0 kg
CH-G A902 17.18 PAM180 17.18:1 IEC 180 · 48 mm shaft 22 kW 81.5 r/min 2578 Nm 3.06 5.1 kN 25.5 kN 190.0 kg
CH-G A902 17.18 PAM200 17.18:1 IEC 200 · 55 mm shaft 30 kW 81.5 r/min 3515 Nm 2.25 5.1 kN 25.5 kN 205.0 kg
CH-G A902 17.18 PAM225 17.18:1 IEC 225 · 60 mm shaft 45 kW 81.5 r/min 5273 Nm 1.5 5.1 kN 25.5 kN 208.0 kg
CH-G A902 15.5 PAM160 15.5:1 IEC 160 · 42 mm shaft 15 kW 90.3 r/min 1586 Nm 4.92 5.1 kN 24.2 kN 190.0 kg
CH-G A902 15.5 PAM180 15.5:1 IEC 180 · 48 mm shaft 22 kW 90.3 r/min 2326 Nm 3.35 5.1 kN 24.2 kN 190.0 kg
CH-G A902 15.5 PAM200 15.5:1 IEC 200 · 55 mm shaft 30 kW 90.3 r/min 3172 Nm 2.46 5.1 kN 24.2 kN 205.0 kg
CH-G A902 15.5 PAM225 15.5:1 IEC 225 · 60 mm shaft 45 kW 90.3 r/min 4758 Nm 1.64 5.1 kN 24.2 kN 208.0 kg
CH-G A902 12.86 PAM160 12.86:1 IEC 160 · 42 mm shaft 15 kW 108.8 r/min 1316 Nm 5.55 5.1 kN 22.9 kN 190.0 kg
CH-G A902 12.86 PAM180 12.86:1 IEC 180 · 48 mm shaft 22 kW 108.8 r/min 1931 Nm 3.78 5.1 kN 22.9 kN 190.0 kg
CH-G A902 12.86 PAM200 12.86:1 IEC 200 · 55 mm shaft 30 kW 108.8 r/min 2633 Nm 2.77 5.1 kN 22.9 kN 205.0 kg
CH-G A902 12.86 PAM225 12.86:1 IEC 225 · 60 mm shaft 45 kW 108.8 r/min 3949 Nm 1.85 5.1 kN 22.9 kN 208.0 kg
CH-G A902 10.28 PAM160 10.28:1 IEC 160 · 42 mm shaft 15 kW 136.2 r/min 1052 Nm 6.85 5 kN 20 kN 190.0 kg
CH-G A902 10.28 PAM180 10.28:1 IEC 180 · 48 mm shaft 22 kW 136.2 r/min 1543 Nm 4.67 5 kN 20 kN 190.0 kg
CH-G A902 10.28 PAM200 10.28:1 IEC 200 · 55 mm shaft 30 kW 136.2 r/min 2103 Nm 3.42 5 kN 20 kN 205.0 kg
CH-G A902 10.28 PAM225 10.28:1 IEC 225 · 60 mm shaft 45 kW 136.2 r/min 3155 Nm 2.28 5 kN 20 kN 208.0 kg
CH-G A902 9.28 PAM160 9.28:1 IEC 160 · 42 mm shaft 15 kW 150.9 r/min 949 Nm 6.85 5 kN 20.7 kN 190.0 kg
CH-G A902 9.28 PAM180 9.28:1 IEC 180 · 48 mm shaft 22 kW 150.9 r/min 1392 Nm 4.67 5 kN 20.7 kN 190.0 kg
CH-G A902 9.28 PAM200 9.28:1 IEC 200 · 55 mm shaft 30 kW 150.9 r/min 1898 Nm 3.42 5 kN 20.7 kN 205.0 kg
CH-G A902 9.28 PAM225 9.28:1 IEC 225 · 60 mm shaft 45 kW 150.9 r/min 2847 Nm 2.28 5 kN 20.7 kN 208.0 kg
CH-G A902 7.7 PAM160 7.7:1 IEC 160 · 42 mm shaft 15 kW 181.9 r/min 788 Nm 6.73 5 kN 21.9 kN 190.0 kg
CH-G A902 7.7 PAM180 7.7:1 IEC 180 · 48 mm shaft 22 kW 181.9 r/min 1155 Nm 4.59 5 kN 21.9 kN 190.0 kg
CH-G A902 7.7 PAM200 7.7:1 IEC 200 · 55 mm shaft 30 kW 181.9 r/min 1575 Nm 3.36 5 kN 21.9 kN 205.0 kg
CH-G A902 7.7 PAM225 7.7:1 IEC 225 · 60 mm shaft 45 kW 181.9 r/min 2363 Nm 2.24 5 kN 21.9 kN 208.0 kg
CH-G A902 6.89 PAM160 6.89:1 IEC 160 · 42 mm shaft 15 kW 203.2 r/min 705 Nm 7.09 4 kN 21.5 kN 190.0 kg
CH-G A902 6.89 PAM180 6.89:1 IEC 180 · 48 mm shaft 22 kW 203.2 r/min 1034 Nm 4.84 4 kN 21.5 kN 190.0 kg
CH-G A902 6.89 PAM200 6.89:1 IEC 200 · 55 mm shaft 30 kW 203.2 r/min 1410 Nm 3.55 4 kN 21.5 kN 205.0 kg
CH-G A902 6.89 PAM225 6.89:1 IEC 225 · 60 mm shaft 45 kW 203.2 r/min 2115 Nm 2.36 4 kN 21.5 kN 208.0 kg
CH-G A902 6.22 PAM160 6.22:1 IEC 160 · 42 mm shaft 15 kW 225.2 r/min 636 Nm 7.7 4 kN 20.6 kN 190.0 kg
CH-G A902 6.22 PAM180 6.22:1 IEC 180 · 48 mm shaft 22 kW 225.2 r/min 933 Nm 5.25 4 kN 20.6 kN 190.0 kg
CH-G A902 6.22 PAM200 6.22:1 IEC 200 · 55 mm shaft 30 kW 225.2 r/min 1272 Nm 3.85 4 kN 20.6 kN 205.0 kg
CH-G A902 6.22 PAM225 6.22:1 IEC 225 · 60 mm shaft 45 kW 225.2 r/min 1908 Nm 2.57 4 kN 20.6 kN 208.0 kg
CH-G A902 5.16 PAM160 5.16:1 IEC 160 · 42 mm shaft 15 kW 271.3 r/min 528 Nm 8.71 4 kN 19.4 kN 190.0 kg
CH-G A902 5.16 PAM180 5.16:1 IEC 180 · 48 mm shaft 22 kW 271.3 r/min 774 Nm 5.94 4 kN 19.4 kN 190.0 kg
CH-G A902 5.16 PAM200 5.16:1 IEC 200 · 55 mm shaft 30 kW 271.3 r/min 1056 Nm 4.36 4 kN 19.4 kN 205.0 kg
CH-G A902 5.16 PAM225 5.16:1 IEC 225 · 60 mm shaft 45 kW 271.3 r/min 1584 Nm 2.9 4 kN 19.4 kN 208.0 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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