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Chiaravalli CH-G A 502 helical gear unit (chiaravalli.com product image)
Chiaravalli

CH-G A 502 Helical Gear Unit (Ø50 mm output shaft)

Cast Iron Gearboxes CH-G

CH-G A 502 helical in-line gear unit — Chiaravalli's cast iron series: two-stage, size 50, ratios 5.5:1 to 48.77:1. 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 Ø50 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, 160 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 48.77:1 gives 29 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, 4.81 to 18.65 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 A502 48.77 PAM80 48.77:1 IEC 80 · 19 mm shaft 1.1 kW 28.7 r/min 366 Nm 4.37 2.4 kN 18 kN 52.0 kg
CH-G A502 48.77 PAM90 48.77:1 IEC 90 · 24 mm shaft 2.2 kW 28.7 r/min 732 Nm 2.19 2.4 kN 18 kN 52.0 kg
CH-G A502 48.77 PAM100 48.77:1 IEC 100 · 28 mm shaft 3 kW 28.7 r/min 998 Nm 1.6 2.4 kN 18 kN 54.0 kg
CH-G A502 48.77 PAM112 48.77:1 IEC 112 · 28 mm shaft 4 kW 28.7 r/min 1331 Nm 1.2 2.4 kN 18 kN 54.0 kg
CH-G A502 48.77 PAM132 48.77:1 IEC 132 · 38 mm shaft 5.5 kW 28.7 r/min 1830 Nm 0.87 2.4 kN 18 kN 58.0 kg
CH-G A502 43.32 PAM80 43.32:1 IEC 80 · 19 mm shaft 1.1 kW 32.3 r/min 325 Nm 4.92 2.4 kN 18 kN 52.0 kg
CH-G A502 43.32 PAM90 43.32:1 IEC 90 · 24 mm shaft 2.2 kW 32.3 r/min 651 Nm 2.46 2.4 kN 18 kN 52.0 kg
CH-G A502 43.32 PAM100 43.32:1 IEC 100 · 28 mm shaft 3 kW 32.3 r/min 887 Nm 1.8 2.4 kN 18 kN 54.0 kg
CH-G A502 43.32 PAM112 43.32:1 IEC 112 · 28 mm shaft 4 kW 32.3 r/min 1183 Nm 1.35 2.4 kN 18 kN 54.0 kg
CH-G A502 43.32 PAM132 43.32:1 IEC 132 · 38 mm shaft 5.5 kW 32.3 r/min 1627 Nm 0.98 2.4 kN 18 kN 58.0 kg
CH-G A502 39.21 PAM80 39.21:1 IEC 80 · 19 mm shaft 1.1 kW 35.7 r/min 294 Nm 5.44 2.3 kN 17.7 kN 52.0 kg
CH-G A502 39.21 PAM90 39.21:1 IEC 90 · 24 mm shaft 2.2 kW 35.7 r/min 589 Nm 2.72 2.3 kN 17.7 kN 52.0 kg
CH-G A502 39.21 PAM100 39.21:1 IEC 100 · 28 mm shaft 3 kW 35.7 r/min 803 Nm 1.99 2.3 kN 17.7 kN 54.0 kg
CH-G A502 39.21 PAM112 39.21:1 IEC 112 · 28 mm shaft 5.5 kW 35.7 r/min 1472 Nm 1.09 2.3 kN 17.7 kN 54.0 kg
CH-G A502 39.21 PAM132 39.21:1 IEC 132 · 38 mm shaft 5.5 kW 35.7 r/min 1472 Nm 1.09 2.3 kN 17.7 kN 58.0 kg
CH-G A502 34.83 PAM80 34.83:1 IEC 80 · 19 mm shaft 1.1 kW 40.2 r/min 262 Nm 6.12 2.2 kN 16.7 kN 52.0 kg
CH-G A502 34.83 PAM90 34.83:1 IEC 90 · 24 mm shaft 2.2 kW 40.2 r/min 523 Nm 3.06 2.2 kN 16.7 kN 52.0 kg
CH-G A502 34.83 PAM100 34.83:1 IEC 100 · 28 mm shaft 3 kW 40.2 r/min 713 Nm 2.24 2.2 kN 16.7 kN 54.0 kg
CH-G A502 34.83 PAM112 34.83:1 IEC 112 · 28 mm shaft 5.5 kW 40.2 r/min 1308 Nm 1.22 2.2 kN 16.7 kN 54.0 kg
CH-G A502 34.83 PAM132 34.83:1 IEC 132 · 38 mm shaft 5.5 kW 40.2 r/min 1308 Nm 1.22 2.2 kN 16.7 kN 58.0 kg
CH-G A502 31.57 PAM80 31.57:1 IEC 80 · 19 mm shaft 1.1 kW 44.3 r/min 237 Nm 6.75 2.1 kN 16 kN 52.0 kg
CH-G A502 31.57 PAM90 31.57:1 IEC 90 · 24 mm shaft 2.2 kW 44.3 r/min 474 Nm 3.38 2.1 kN 16 kN 52.0 kg
CH-G A502 31.57 PAM100 31.57:1 IEC 100 · 28 mm shaft 3 kW 44.3 r/min 646 Nm 2.48 2.1 kN 16 kN 54.0 kg
CH-G A502 31.57 PAM112 31.57:1 IEC 112 · 28 mm shaft 5.5 kW 44.3 r/min 1184 Nm 1.35 2.1 kN 16 kN 54.0 kg
CH-G A502 31.57 PAM132 31.57:1 IEC 132 · 38 mm shaft 5.5 kW 44.3 r/min 1184 Nm 1.35 2.1 kN 16 kN 58.0 kg
CH-G A502 28.26 PAM80 28.26:1 IEC 80 · 19 mm shaft 1.1 kW 49.5 r/min 212 Nm 7.55 2 kN 15.1 kN 52.0 kg
CH-G A502 28.26 PAM90 28.26:1 IEC 90 · 24 mm shaft 2.2 kW 49.5 r/min 424 Nm 3.77 2 kN 15.1 kN 52.0 kg
CH-G A502 28.26 PAM100 28.26:1 IEC 100 · 28 mm shaft 3 kW 49.5 r/min 578 Nm 2.77 2 kN 15.1 kN 54.0 kg
CH-G A502 28.26 PAM112 28.26:1 IEC 112 · 28 mm shaft 5.5 kW 49.5 r/min 1060 Nm 1.51 2 kN 15.1 kN 54.0 kg
CH-G A502 28.26 PAM132 28.26:1 IEC 132 · 38 mm shaft 7.5 kW 49.5 r/min 1446 Nm 1.11 2 kN 15.1 kN 58.0 kg
CH-G A502 26.98 PAM100 26.98:1 IEC 100 · 28 mm shaft 3 kW 51.9 r/min 552 Nm 2.9 2 kN 14.8 kN 54.0 kg
CH-G A502 26.98 PAM112 26.98:1 IEC 112 · 28 mm shaft 5.5 kW 51.9 r/min 1013 Nm 1.58 2 kN 14.8 kN 54.0 kg
CH-G A502 26.98 PAM132 26.98:1 IEC 132 · 38 mm shaft 7.5 kW 51.9 r/min 1381 Nm 1.16 2 kN 14.8 kN 58.0 kg
CH-G A502 26.98 PAM160 26.98:1 IEC 160 · 42 mm shaft 11 kW 51.9 r/min 2025 Nm 0.79 2 kN 14.8 kN 65.0 kg
CH-G A502 23.14 PAM100 23.14:1 IEC 100 · 28 mm shaft 3 kW 60.5 r/min 473 Nm 3.38 1.8 kN 13.7 kN 54.0 kg
CH-G A502 23.14 PAM112 23.14:1 IEC 112 · 28 mm shaft 5.5 kW 60.5 r/min 868 Nm 1.84 1.8 kN 13.7 kN 54.0 kg
CH-G A502 23.14 PAM132 23.14:1 IEC 132 · 38 mm shaft 7.5 kW 60.5 r/min 1183 Nm 1.35 1.8 kN 13.7 kN 58.0 kg
CH-G A502 23.14 PAM160 23.14:1 IEC 160 · 42 mm shaft 11 kW 60.5 r/min 1736 Nm 0.92 1.8 kN 13.7 kN 65.0 kg
CH-G A502 21.69 PAM100 21.69:1 IEC 100 · 28 mm shaft 3 kW 64.5 r/min 444 Nm 3.6 1.7 kN 13.2 kN 54.0 kg
CH-G A502 21.69 PAM112 21.69:1 IEC 112 · 28 mm shaft 5.5 kW 64.5 r/min 814 Nm 1.97 1.7 kN 13.2 kN 54.0 kg
CH-G A502 21.69 PAM132 21.69:1 IEC 132 · 38 mm shaft 7.5 kW 64.5 r/min 1110 Nm 1.44 1.7 kN 13.2 kN 58.0 kg
CH-G A502 21.69 PAM160 21.69:1 IEC 160 · 42 mm shaft 11 kW 64.5 r/min 1628 Nm 0.98 1.7 kN 13.2 kN 65.0 kg
CH-G A502 19.66 PAM100 19.66:1 IEC 100 · 28 mm shaft 3 kW 71.2 r/min 402 Nm 3.98 1.6 kN 12.6 kN 54.0 kg
CH-G A502 19.66 PAM112 19.66:1 IEC 112 · 28 mm shaft 5.5 kW 71.2 r/min 738 Nm 2.17 1.6 kN 12.6 kN 54.0 kg
CH-G A502 19.66 PAM132 19.66:1 IEC 132 · 38 mm shaft 7.5 kW 71.2 r/min 1006 Nm 1.59 1.6 kN 12.6 kN 58.0 kg
CH-G A502 19.66 PAM160 19.66:1 IEC 160 · 42 mm shaft 11 kW 71.2 r/min 1475 Nm 1.08 1.6 kN 12.6 kN 65.0 kg
CH-G A502 18.81 PAM100 18.81:1 IEC 100 · 28 mm shaft 3 kW 74.4 r/min 385 Nm 3.9 1.6 kN 12.7 kN 54.0 kg
CH-G A502 18.81 PAM112 18.81:1 IEC 112 · 28 mm shaft 5.5 kW 74.4 r/min 706 Nm 2.13 1.6 kN 12.7 kN 54.0 kg
CH-G A502 18.81 PAM132 18.81:1 IEC 132 · 38 mm shaft 7.5 kW 74.4 r/min 962 Nm 1.56 1.6 kN 12.7 kN 58.0 kg
CH-G A502 18.81 PAM160 18.81:1 IEC 160 · 42 mm shaft 11 kW 74.4 r/min 1411 Nm 1.06 1.6 kN 12.7 kN 65.0 kg
CH-G A502 16.86 PAM100 16.86:1 IEC 100 · 28 mm shaft 3 kW 83 r/min 345 Nm 4.35 1.5 kN 12.1 kN 54.0 kg
CH-G A502 16.86 PAM112 16.86:1 IEC 112 · 28 mm shaft 5.5 kW 83 r/min 633 Nm 2.37 1.5 kN 12.1 kN 54.0 kg
CH-G A502 16.86 PAM132 16.86:1 IEC 132 · 38 mm shaft 7.5 kW 83 r/min 863 Nm 1.74 1.5 kN 12.1 kN 58.0 kg
CH-G A502 16.86 PAM160 16.86:1 IEC 160 · 42 mm shaft 11 kW 83 r/min 1265 Nm 1.19 1.5 kN 12.1 kN 65.0 kg
CH-G A502 15.13 PAM100 15.13:1 IEC 100 · 28 mm shaft 3 kW 92.6 r/min 309 Nm 4.85 1.3 kN 11.4 kN 54.0 kg
CH-G A502 15.13 PAM112 15.13:1 IEC 112 · 28 mm shaft 5.5 kW 92.6 r/min 567 Nm 2.64 1.3 kN 11.4 kN 54.0 kg
CH-G A502 15.13 PAM132 15.13:1 IEC 132 · 38 mm shaft 7.5 kW 92.6 r/min 774 Nm 1.94 1.3 kN 11.4 kN 58.0 kg
CH-G A502 15.13 PAM160 15.13:1 IEC 160 · 42 mm shaft 11 kW 92.6 r/min 1135 Nm 1.32 1.3 kN 11.4 kN 65.0 kg
CH-G A502 13.71 PAM100 13.71:1 IEC 100 · 28 mm shaft 3 kW 102.1 r/min 281 Nm 4.99 1.3 kN 11.3 kN 54.0 kg
CH-G A502 13.71 PAM112 13.71:1 IEC 112 · 28 mm shaft 5.5 kW 102.1 r/min 514 Nm 2.72 1.3 kN 11.3 kN 54.0 kg
CH-G A502 13.71 PAM132 13.71:1 IEC 132 · 38 mm shaft 7.5 kW 102.1 r/min 701 Nm 2 1.3 kN 11.3 kN 58.0 kg
CH-G A502 13.71 PAM160 13.71:1 IEC 160 · 42 mm shaft 11 kW 102.1 r/min 1029 Nm 1.36 1.3 kN 11.3 kN 65.0 kg
CH-G A502 11.2 PAM132 11.2:1 IEC 132 · 38 mm shaft 7.5 kW 125 r/min 573 Nm 1.92 1.3 kN 11.5 kN 58.0 kg
CH-G A502 11.2 PAM160 11.2:1 IEC 160 · 42 mm shaft 11 kW 125 r/min 841 Nm 1.31 1.3 kN 11.5 kN 65.0 kg
CH-G A502 9.01 PAM132 9.01:1 IEC 132 · 38 mm shaft 7.5 kW 155.4 r/min 461 Nm 1.95 1.3 kN 11.2 kN 58.0 kg
CH-G A502 9.01 PAM160 9.01:1 IEC 160 · 42 mm shaft 11 kW 155.4 r/min 676 Nm 1.33 1.3 kN 11.2 kN 65.0 kg
CH-G A502 8.16 PAM132 8.16:1 IEC 132 · 38 mm shaft 7.5 kW 171.5 r/min 418 Nm 1.91 1.3 kN 11.2 kN 58.0 kg
CH-G A502 8.16 PAM160 8.16:1 IEC 160 · 42 mm shaft 11 kW 171.5 r/min 613 Nm 1.31 1.3 kN 11.2 kN 65.0 kg
CH-G A502 7.55 PAM132 7.55:1 IEC 132 · 38 mm shaft 7.5 kW 185.5 r/min 386 Nm 2.07 1.2 kN 10.8 kN 58.0 kg
CH-G A502 7.55 PAM160 7.55:1 IEC 160 · 42 mm shaft 15 kW 185.5 r/min 772 Nm 1.04 1.2 kN 10.8 kN 65.0 kg
CH-G A502 6.07 PAM132 6.07:1 IEC 132 · 38 mm shaft 7.5 kW 230.6 r/min 310 Nm 2.25 1 kN 10.3 kN 58.0 kg
CH-G A502 6.07 PAM160 6.07:1 IEC 160 · 42 mm shaft 15 kW 230.6 r/min 621 Nm 1.13 1 kN 10.3 kN 65.0 kg
CH-G A502 5.5 PAM132 5.5:1 IEC 132 · 38 mm shaft 7.5 kW 254.5 r/min 282 Nm 2.49 0.8 kN 9.8 kN 58.0 kg
CH-G A502 5.5 PAM160 5.5:1 IEC 160 · 42 mm shaft 15 kW 254.5 r/min 563 Nm 1.24 0.8 kN 9.8 kN 65.0 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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