- 1 1/4 in Bore
 - Air Actuated, Spring Return
 - Standard Coefficient Facing
 - 34.31 hp Peak Thermal Input
 - Flange Mount, Requires Bearing Support Drive Arangement
 
features
- Straight bore
 - Shaft mounted
 - Flange output
 - Drive shell support is provided by bearing mounted flywheel or pulley/sprocket
 - Air engaged
 - Straight bore
 - Aluminum air chamber, black oxide drive shell
 - Drive shell support provided by bearing-mounted flywheel or pulley/sprocket
 - Flange mount, requires bearing support
 - Multi-disc clutch with flange output
 - Open design
 - Operating speed up to 1,800 rpm
 - Shaft-mounted
 
| Overall Length | 3.375 in | 
| Open Or Enclosed Design | Open | 
| Photo | 4HClutch | 
| Accessory Miscellaneous | 940011, 940012, 940021, 948804, 854000, 918500, 920600, 921300, 932800, 939101, 939201, 940001, 940412, 944900, 945100, 948801, 948802, 948803 | 
| Minimum Engagement Pressure | 10 psi | 
| Recommended Control Kits | 940011, 940017, 940021, 940412 | 
| Clutch Facing Type | Standard Coefficient | 
| Bore Style | Straight | 
| Model | 4H40 | 
| Drive Inertia | N/A | 
| Maximum Clutch Continuous Thermal Dissipation | 0.15 hp | 
| Pilot Or Drive Flange Bolt Circle Data | 4, 1/4"-20 Bolts @ 90° On A 4.250 in. Circle | 
| Approximate Clutch Facing Life | 107 hp-hr | 
| Clutch Facing Effective Area | 38.12 in2 | 
| Product Category | Multi-Disc Clutches | 
| Main Category | Friction Clutches | 
| Clutch Peak Thermal Input Rate | 34.31 hp | 
| Family Name | 4H Clutches | 
| Clutch Air Chamber Volume When Worn Out | N/A | 
| Maximum Static Clutch Torque | 1650 in lb | 
| Drive Arrangement | Flange Mount, Requires Bearing Support | 
| Actuation/Return | Air/Spring | 
| Clutch Facing Edge Color Code | Red | 
| Port or Hose Size | 0.125 NPT | 
| Kits | 918500, 921300 | 
| Maximum Pressure | 80 psi | 
| Clutch Air Chamber Volume When New | 0.33 in3 | 
| Outside Dia. | 5 in | 
| Control Accessories | 932800, 939101, 939201, 939300, 940001, 940412, 944900, 945100, 948801, 948802, 948803, 948804 | 
| Clutch Heat Sink Capacity | 9590 lbf ft | 
| Finish | Aluminum Air Chamber, Black Oxide Drive Shell | 
| Weight | 11.63 LB | 
| EAN or UPC | 662284166126 | 
        
