Power Tool Reversible Female Coupling - 42-90-0170

Restore the driving power and mechanical efficiency of your equipment with the Reversible Female Coupling (Part Number: 42-90-0170). This high-strength component acts as a critical link in the tool's drive train, allowing for the seamless transfer of torque from the motor to the output shaft. Its reversible design is engineered to handle both clockwise and counter-clockwise rotation, making it essential for tools that feature a reverse function, such as impact wrenches or drills. If your tool is slipping under load, making a high-pitched grinding noise, or failing to engage the drive in one direction, the internal splines of the coupling may be rounded or sheared.

The 42-90-0170 is precision-machined from hardened alloy steel to provide maximum resistance against wear and impact. The internal female threads or splines are cut to exact tolerances to ensure a zero-slip connection, reducing vibration and preventing secondary damage to the drive shaft.

1. Safety First: Remove the battery pack or unplug the power cord from the source before beginning any disassembly.
2. Access the Drive Housing: Remove the screws from the outer gear case or motor housing. You may need to remove the chuck or nose cone first depending on the specific tool model.
3. Locate the Coupling: The 42-90-0170 coupling is typically found positioned between the motor pinion and the transmission gears.
4. Remove the Damaged Part: Slide the old coupling off the drive shaft. If it has seized, a small amount of penetrating oil or a specialized puller tool may be required to free it without damaging the surrounding gears.
5. Inspect for Debris: Clean the shaft and the surrounding gear chamber. Check for metal shavings from the old part and remove them to prevent future mechanical failure.
6. Install the New Coupling: Lightly lubricate the internal splines of the new coupling with high-pressure gear grease. Slide it onto the shaft, ensuring it is fully seated and aligned with the mating gear.
7. Reassemble and Test: Secure the housing, reinstall the battery, and test the tool in both forward and reverse modes to ensure smooth engagement.

• Reversible Female Coupling - Part Number: 42-90-0170
• High-Torque Capacity: Engineered to withstand the sudden impacts and high rotational speeds of professional-grade power tools.
• Hardened Steel Construction: Built for long-term durability and resistance to stripping under heavy loads.
• Precision Spline Alignment: Ensures a tight, vibration-free fit for improved tool accuracy and user comfort.
• Reversible Design: Optimized for tools requiring bidirectional operation without loss of mechanical integrity.
• Corrosion Resistant: Treated with a protective finish to prevent rust and binding in humid or job-site environments.
• OEM-Quality Part: Specifically designed as a direct replacement to maintain the original factory performance of your tool.