HC-725 Crane Duty Gearbox
Three stage helical gearbox with three reduction stages, case-hardened and profile-ground gears, roller bearings throughout and a solid output shaft.
Dimensions (mm)
| Code | Dimension | CI body | Fabricated |
|---|---|---|---|
| Shafts | |||
| ØD1 | Input shaft Ø | 60 | 60 |
| L1 | Input shaft length | 100 | 100 |
| ØD2 | Output shaft Ø | 125 | 125 |
| L2 | Output shaft length | 200 | 200 |
| N | 155 | 155 | |
| M | 275 | 275 | |
| Overall | |||
| C | Centre distance, input to output | 725 | 725 |
| A | Overall length | 1330 | 1330 |
| H | Overall height | 690 | 675 |
| h | Shaft centre height | 350 | 350 |
| S | 1190 | 1190 | |
| W | 440 | 440 | |
| B | Base width | 440 | 440 |
| Foot & mounting | |||
| Z | 255 | 255 | |
| T | 50 | 50 | |
| P | 410 | 410 | |
| Q | 280 | 280 | |
| R | 400 | 400 | |
| U | – | 50 | |
| F | 370 | 370 | |
| ØK | Foot bolt hole Ø | 29 | 29 |
| Keys | |||
| X1 | Input key width | 18 | 18 |
| Y1 | Input shaft to key top | 64.5 | 64.5 |
| X | Output key width | 32 | 32 |
| Y | Output shaft to key top | 132.5 | 132.5 |
| Weight & oil | |||
| Weight | Average weight | 1000 kg | 1100 kg |
| Oil | Oil quantity | 85 L | 85 L |
Letter codes match the GA drawing. Weight and oil quantity are indicative. Dimensions are subject to change with product development.
Power ratings
| Ratio i | Actual | n₂ rpm | kW @1500 | kW @1000 | kW @750 |
|---|---|---|---|---|---|
| 25:1 | 25 | 60 | 170.2 | 113.2 | 90.6 |
| 31.5:1 | 31.5 | 47.6 | 154.9 | 103 | 82.4 |
| 35.5:1 | 37.8 | 42.3 | 140.9 | 93.7 | 75 |
| 40:1 | 40 | 37.5 | 128.2 | 85.3 | 68.2 |
| 45:1 | 46.5 | 33.3 | 116.7 | 77.6 | 62.1 |
| 50:1 | 51 | 30 | 106.2 | 70.6 | 56.5 |
| 56:1 | 56 | 26.8 | 96.6 | 64.3 | 51.4 |
| 63:1 | 60 | 23.8 | 87.9 | 58.5 | 46.8 |
| 71:1 | 69.4 | 21.1 | 80 | 53.2 | 42.6 |
| 80:1 | 85.5 | 18.8 | 72.8 | 48.4 | 38.7 |
| 90:1 | 92.4 | 16.7 | 66.2 | 44.1 | 35.2 |
| 100:1 | 107.8 | 15 | 60.3 | 40.1 | 32.1 |
| 112:1 | 116.5 | 13.4 | 54.8 | 36.5 | 29.2 |
| 140:1 | 136 | 10.7 | 45.4 | 30.2 | 24.2 |
Nominal input power in kW at the stated input speed. n₂ is the nominal output speed at 1500 rpm input. Consult J.S. Gear for application-specific selection.
Output shaft loading
Permissible overhung load on the output shaft is 42 kN, acting at the middle of the shaft extension (L/2). Above this, support the drum on its own shaft and bearings with a flexible coupling, or use the standard gear ring below.
Standard gear ring · HC-725
| ØD | ØP | ØS | C | SL1 | T | ØDR | ØB | BL |
|---|---|---|---|---|---|---|---|---|
| 550 | 475 | 300 | 350 | 5 | 38 | 21 | 140 | 50 |
| 625 | 550 | 350 | 350 | 5 | 38 | 21 | 140 | 50 |
| 680 | 600 | 450 | 350 | 5 | 38 | 21 | 140 | 50 |
All dimensions in mm. Other gear ring sizes on request. Request a certified drawing before manufacture.
Need a price or a certified GA drawing?
Send the duty for HC-725 and we reply with price, delivery and a certified GA drawing.