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Chiaravalli CH-G A 401 helical gear unit (chiaravalli.com product image)
Chiaravalli

CH-G A 401 Helical Gear Unit (Ø28 mm output shaft)

Cast Iron Gearboxes CH-G

CH-G A 401 helical in-line gear unit — Chiaravalli's cast iron series: single-stage, size 40, ratios 1.31:1 to 8.25:1. 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 Ø28 j6. 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 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 8.25:1 gives 170 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, 3.02 to 8.94 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 A401 8.25 PAM80 8.25:1 IEC 80 · 19 mm shaft 1.1 kW 169.7 r/min 62 Nm 2.75 2.7 kN 3.7 kN 11.0 kg
CH-G A401 8.25 PAM90 8.25:1 IEC 90 · 24 mm shaft 2.2 kW 169.7 r/min 124 Nm 1.37 2.7 kN 3.7 kN 11.0 kg
CH-G A401 8.25 PAM100 8.25:1 IEC 100 · 28 mm shaft 3 kW 169.7 r/min 169 Nm 1.01 2.7 kN 3.7 kN 15.5 kg
CH-G A401 8.25 PAM112 8.25:1 IEC 112 · 28 mm shaft 4 kW 169.7 r/min 225 Nm 0.76 2.7 kN 3.7 kN 15.5 kg
CH-G A401 7.22 PAM80 7.22:1 IEC 80 · 19 mm shaft 1.1 kW 193.8 r/min 54 Nm 3.14 2.6 kN 3.7 kN 11.0 kg
CH-G A401 7.22 PAM90 7.22:1 IEC 90 · 24 mm shaft 2.2 kW 193.8 r/min 108 Nm 1.57 2.6 kN 3.7 kN 11.0 kg
CH-G A401 7.22 PAM100 7.22:1 IEC 100 · 28 mm shaft 3 kW 193.8 r/min 148 Nm 1.15 2.6 kN 3.7 kN 15.5 kg
CH-G A401 7.22 PAM112 7.22:1 IEC 112 · 28 mm shaft 4 kW 193.8 r/min 197 Nm 0.86 2.6 kN 3.7 kN 15.5 kg
CH-G A401 5.73 PAM80 5.73:1 IEC 80 · 19 mm shaft 1.1 kW 244.4 r/min 43 Nm 3.95 2.5 kN 3.4 kN 11.0 kg
CH-G A401 5.73 PAM90 5.73:1 IEC 90 · 24 mm shaft 2.2 kW 244.4 r/min 86 Nm 1.98 2.5 kN 3.4 kN 11.0 kg
CH-G A401 5.73 PAM100 5.73:1 IEC 100 · 28 mm shaft 3 kW 244.4 r/min 117 Nm 1.45 2.5 kN 3.4 kN 15.5 kg
CH-G A401 5.73 PAM112 5.73:1 IEC 112 · 28 mm shaft 4 kW 244.4 r/min 156 Nm 1.09 2.5 kN 3.4 kN 15.5 kg
CH-G A401 5.17 PAM80 5.17:1 IEC 80 · 19 mm shaft 1.1 kW 271 r/min 39 Nm 4.38 2.5 kN 3.2 kN 11.0 kg
CH-G A401 5.17 PAM90 5.17:1 IEC 90 · 24 mm shaft 2.2 kW 271 r/min 78 Nm 2.19 2.5 kN 3.2 kN 11.0 kg
CH-G A401 5.17 PAM100 5.17:1 IEC 100 · 28 mm shaft 3 kW 271 r/min 106 Nm 1.61 2.5 kN 3.2 kN 15.5 kg
CH-G A401 5.17 PAM112 5.17:1 IEC 112 · 28 mm shaft 4 kW 271 r/min 141 Nm 1.21 2.5 kN 3.2 kN 15.5 kg
CH-G A401 4.69 PAM80 4.69:1 IEC 80 · 19 mm shaft 1.1 kW 298.4 r/min 35 Nm 4.55 2.5 kN 3.1 kN 11.0 kg
CH-G A401 4.69 PAM90 4.69:1 IEC 90 · 24 mm shaft 2.2 kW 298.4 r/min 70 Nm 2.27 2.5 kN 3.1 kN 11.0 kg
CH-G A401 4.69 PAM100 4.69:1 IEC 100 · 28 mm shaft 3 kW 298.4 r/min 96 Nm 1.67 2.5 kN 3.1 kN 15.5 kg
CH-G A401 4.69 PAM112 4.69:1 IEC 112 · 28 mm shaft 4 kW 298.4 r/min 128 Nm 1.25 2.5 kN 3.1 kN 15.5 kg
CH-G A401 3.93 PAM80 3.93:1 IEC 80 · 19 mm shaft 1.1 kW 355.9 r/min 30 Nm 5.08 2.4 kN 3 kN 11.0 kg
CH-G A401 3.93 PAM90 3.93:1 IEC 90 · 24 mm shaft 2.2 kW 355.9 r/min 59 Nm 2.54 2.4 kN 3 kN 11.0 kg
CH-G A401 3.93 PAM100 3.93:1 IEC 100 · 28 mm shaft 3 kW 355.9 r/min 81 Nm 1.86 2.4 kN 3 kN 15.5 kg
CH-G A401 3.93 PAM112 3.93:1 IEC 112 · 28 mm shaft 5.5 kW 355.9 r/min 148 Nm 1.02 2.4 kN 3 kN 15.5 kg
CH-G A401 3.63 PAM80 3.63:1 IEC 80 · 19 mm shaft 1.1 kW 386.2 r/min 27 Nm 5.52 2.4 kN 2.9 kN 11.0 kg
CH-G A401 3.63 PAM90 3.63:1 IEC 90 · 24 mm shaft 2.2 kW 386.2 r/min 54 Nm 2.76 2.4 kN 2.9 kN 11.0 kg
CH-G A401 3.63 PAM100 3.63:1 IEC 100 · 28 mm shaft 3 kW 386.2 r/min 74 Nm 2.02 2.4 kN 2.9 kN 15.5 kg
CH-G A401 3.63 PAM112 3.63:1 IEC 112 · 28 mm shaft 5.5 kW 386.2 r/min 136 Nm 1.1 2.4 kN 2.9 kN 15.5 kg
CH-G A401 3.11 PAM80 3.11:1 IEC 80 · 19 mm shaft 1.1 kW 450 r/min 23 Nm 5.57 2.4 kN 2.8 kN 11.0 kg
CH-G A401 3.11 PAM90 3.11:1 IEC 90 · 24 mm shaft 2.2 kW 450 r/min 47 Nm 2.79 2.4 kN 2.8 kN 11.0 kg
CH-G A401 3.11 PAM100 3.11:1 IEC 100 · 28 mm shaft 3 kW 450 r/min 64 Nm 2.04 2.4 kN 2.8 kN 15.5 kg
CH-G A401 3.11 PAM112 3.11:1 IEC 112 · 28 mm shaft 5.5 kW 450 r/min 117 Nm 1.11 2.4 kN 2.8 kN 15.5 kg
CH-G A401 2.52 PAM80 2.52:1 IEC 80 · 19 mm shaft 1.1 kW 554.7 r/min 19 Nm 6.34 2.3 kN 2.6 kN 11.0 kg
CH-G A401 2.52 PAM90 2.52:1 IEC 90 · 24 mm shaft 2.2 kW 554.7 r/min 38 Nm 3.17 2.3 kN 2.6 kN 11.0 kg
CH-G A401 2.52 PAM100 2.52:1 IEC 100 · 28 mm shaft 3 kW 554.7 r/min 52 Nm 2.32 2.3 kN 2.6 kN 15.5 kg
CH-G A401 2.52 PAM112 2.52:1 IEC 112 · 28 mm shaft 5.5 kW 554.7 r/min 95 Nm 1.27 2.3 kN 2.6 kN 15.5 kg
CH-G A401 2.08 PAM80 2.08:1 IEC 80 · 19 mm shaft 1.1 kW 672 r/min 16 Nm 7.67 2.1 kN 2.4 kN 11.0 kg
CH-G A401 2.08 PAM90 2.08:1 IEC 90 · 24 mm shaft 2.2 kW 672 r/min 31 Nm 3.84 2.1 kN 2.4 kN 11.0 kg
CH-G A401 2.08 PAM100 2.08:1 IEC 100 · 28 mm shaft 3 kW 672 r/min 43 Nm 2.81 2.1 kN 2.4 kN 15.5 kg
CH-G A401 2.08 PAM112 2.08:1 IEC 112 · 28 mm shaft 5.5 kW 672 r/min 78 Nm 1.53 2.1 kN 2.4 kN 15.5 kg
CH-G A401 1.31 PAM80 1.31:1 IEC 80 · 19 mm shaft 1.1 kW 1066.7 r/min 9.8 Nm 8.13 2.1 kN 2.2 kN 11.0 kg
CH-G A401 1.31 PAM90 1.31:1 IEC 90 · 24 mm shaft 2.2 kW 1066.7 r/min 20 Nm 4.06 2.1 kN 2.2 kN 11.0 kg
CH-G A401 1.31 PAM100 1.31:1 IEC 100 · 28 mm shaft 3 kW 1066.7 r/min 27 Nm 2.98 2.1 kN 2.2 kN 15.5 kg
CH-G A401 1.31 PAM112 1.31:1 IEC 112 · 28 mm shaft 5.5 kW 1066.7 r/min 49 Nm 1.63 2.1 kN 2.2 kN 15.5 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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