Sioux's 45º Threaded Drill Motor is NEW & IMPROVED and better than ever!

Sioux's classic 45º Threaded Drill Motor has been completely updated with the Signature Series treatment and offers the latest in ergonomics, durability, and power! The predecessor to this drill (the 1AM1541) has been the standard in the aviation industry for well over a decade with tens of thousands of drills in service throughout the industry. With the new improvements and our low pricing, now is the time to UPGRADE to the latest model and technology. Made in the USA! 

• Model SDR4A28F8L   - 45º Threaded Drill Motor
  
• Full .4 HORSE POWER motor package - higher power and stall torque than the predecessor model giving you 33% MORE POWER!
• Heads are now truly quick-change - you can replace the head with a different style in literally seconds, simply unscrew the installed head, and reinstall the new head. You can buy extra heads (Standard 90º, 360º, Low-Profile 90º, or Heavy-Duty 90º and use them all on one motor!)
  
• Three-planet gear system for durability & long life.
  
• State of the art Spiral Bevel Gears for long life & durability.
  
• 2800 RPM
• Only 9.8" long!  Weighs just 1.87 lbs.
• Excellent, TEASING throttle trigger for smooth starts!
  
• 45º Head gets into tight areas with a head height of 1.11"
• Industry-standard 1/4-28 Threads.
  
• Integrated ergonomic rubber grip for superb comfort and control.
  
• Made in the USA by Sioux Tools (a division of Snap-On!)

Order Model #   SDR4A28F8L       
Sioux .4HP Signature Series 45º Threaded Drill Motor, 2800 RPM

(Model SDR4A28F8L is the direct and equivalent replacement for legacy model 1AM1541 which was discontinued by Sioux at the end of 2021.)

Don't forget...we offer FREE ground shipping within the USA for orders over $95 that are pre-paid with a credit card. (And now, this includes Alaska, Hawaii, & APO/FPO addresses!)

As one of the largest authorized Sioux distributors in the world, we are committed to offering the absolute best price on any Sioux tool that we stock - in the very unlikely event that you find a Sioux model in stock and for sale at a lower price at any other authorized Sioux distributor, let us know and we will beat that price - period. We constantly monitor our competitors to make sure that we are offering the best value so that you can buy from us with confidence.