Ingersoll Rand 3956B1Ti 1.5" Titanium Pneumatic Impact Wrench | No. 5 Spline Drive | 3600 RPM | 5450 ft-lbs Max Torque | Inside Trigger

When large industrial fasteners resist conventional impact equipment, the Ingersoll Rand 3956B1Ti 1.5-inch Titanium Pneumatic Impact Wrench delivers up to 5,450 ft-lbs (7,300 Nm) of maximum reverse breakaway torque for demanding bolt removal operations. Part of the 3956 Series, this D-handle air impact wrench features a No. 5 spline thru-hole drive, 3,600 RPM free speed, and inside-trigger actuation. The spline drive uses a multi-groove connection for compatible industrial impact sockets, while the thru-hole configuration accommodates the appropriate socket-retention arrangement. With up to 5,200 ft-lbs (7,020 Nm) of forward torque, the tool provides substantial tightening capability for large threaded fasteners used in heavy machinery, industrial assembly, rail maintenance, and equipment servicing.

Built for high-torque fastening environments, the 3956B1Ti incorporates an optimized titanium hammer case, bronze endplates, and corrosion-resistant components. Its twin-hammer impact mechanism delivers repeated rotational impacts to transfer torque to resistant fasteners, while the reverse-bias motor supports demanding loosening operations. The redesigned 360-degree adjustable D-auxiliary handle allows operators to reposition their supporting grip for different tool orientations and access requirements. Weighing 34.3 lbs (15.53 kg) and measuring 16.68 inches (423.65 mm) in length, this pneumatic impact wrench combines considerable torque output with a configurable two-handed operating arrangement for industrial maintenance, large-equipment assembly, and heavy-fastener removal.

Type: Pneumatic Impact Wrench | Manufacturer: Ingersoll Rand | Model: 3956B1Ti | Series: 3956 | Drive Size: No. 5 Spline (1.5" Class) | Drive Type: Spline, Thru-Hole | Handle: 360° D-Aux Handle | Actuation: Inside Trigger | Impact Mechanism: Twin Hammer | Recommended Forward Torque Range: 1,600–4,900 ft-lbs | Maximum Forward Torque: 5,200 ft-lbs (7,020 Nm) | Maximum Reverse Torque: 5,450 ft-lbs (7,300 Nm) | Free Speed: 3,600 RPM | Blows Per Minute: 700 | Weight: 34.3 lbs (15.53 kg) | Length: 16.68" (423.65 mm) | Air Inlet: 1/2" NPT | Minimum Hose Size: 3/4" | Air Consumption at Load: 105 CFM | Average Air Consumption: 145 CFM | Operating Pressure: 90 PSI (6.2 bar) | Vibration Level: 16.4 m/s² (K = 5.6 m/s²)

Features:

• 5,450 ft-lbs maximum reverse torque provides substantial breakaway capability for removing large, tightly secured industrial fasteners.
• 5,200 ft-lbs maximum forward torque supports high-torque fastening operations when used within the manufacturer's recommended working range.
• No. 5 spline thru-hole drive accommodates matching industrial impact sockets and the appropriate socket-retention arrangement.
• Optimized titanium hammer case provides a durable housing for the impact mechanism without relying on a conventional all-steel hammer case.
• Bronze endplates and corrosion-resistant components support durability in industrial operating environments.
• Twin-hammer impact mechanism delivers repeated rotational impacts for tightening and loosening large threaded fasteners.
• Reverse-bias motor and pressure-fed mechanism lubrication support high-torque loosening and lubrication of the impact mechanism.
• Redesigned 360-degree D-auxiliary handle allows positioning of the supporting grip to suit the application and operating orientation.
• Inside-trigger actuation and integral muffler provide the specified control arrangement and help manage exhaust noise.

Note: Model 3956B1Ti is the new and upgraded direct replacement for the older model 3955B1Ti

Applications:

• Heavy equipment maintenance – removing and installing large threaded fasteners on construction machinery, mining equipment, and heavy mechanical assemblies.
• Rail and transportation service – handling high-torque bolting operations on suitable rolling stock components and maintenance equipment.
• Industrial machinery assembly – fastening large bolted joints during machinery installation, equipment rebuilding, and production assembly.
• Shipyard and marine equipment maintenance – servicing large mechanical fasteners on compatible shipboard machinery and structural equipment.
• Industrial maintenance and MRO – loosening stubborn fasteners during plant shutdowns, machinery overhauls, and major equipment repairs.

FAQs:

• Q: What is the maximum torque of the Ingersoll Rand 3956B1Ti?

  A: The 3956B1Ti delivers up to 5,450 ft-lbs (7,300 Nm) maximum reverse torque for loosening fasteners and 5,200 ft-lbs (7,020 Nm) maximum forward torque for tightening. The manufacturer's recommended forward working range is 1,600–4,900 ft-lbs. Maximum torque ratings are not the same as a calibrated final tightening torque.

• Q: What is a No. 5 spline drive, and can I use standard square-drive sockets?

  A: A No. 5 spline drive uses a grooved drive profile rather than the four-sided connection found on square-drive impact wrenches. The 3956B1Ti requires compatible No. 5 spline impact sockets and an appropriate retention system. Standard square-drive sockets cannot be fitted directly onto its spline drive.

• Q: How much compressed air does the 3956B1Ti require?

  A: Ingersoll Rand specifies 105 CFM air consumption at load, 145 CFM average air consumption, a 1/2-inch air inlet, and a minimum 3/4-inch supply hose at the specified 90 PSI operating pressure. Verify the complete air distribution system can maintain the required pressure and airflow at the tool during operation.

• Q: What is the difference between the 3956B1Ti and 3956B2Ti?

  A: Both models have the same torque ratings, speed, handle configuration, and inside-trigger actuation. The 3956B1Ti uses a No. 5 spline thru-hole drive, while the 3956B2Ti uses a 1-1/2-inch square thru-hole drive. Choose the model that matches your approved industrial impact socket system.

• Q: Can the auxiliary handle be repositioned?

  A: Yes. The 3956 Series features a redesigned 360-degree D-auxiliary handle that can be positioned to accommodate different operating orientations. Follow the manufacturer's instructions for securing the handle before operating the tool.

Tech Tip: To increase tool performance, extend tool life and lessen repair costs use it with a  Filter-Regulator-Lubricator (FRLs)

Ingersoll Rand 3956B1Ti Impact Wrench Parts List