Clever fastening technology keeps top-fuel dragsters on track

Jan. 26, 2006
An innovative fastener-locking system with a new wrenching feature is preventing failures and costly downtime in top-fuel dragsters.

Tony Schumacher's top-fuel dragster is a good test of Stage 8 locking fasteners.


 

The idea for the fastener arose when engineers at Stage 8 Locking Fasteners Inc., San Rafael, Calif., asked, "If a wrench is good for tightening bolts, couldn't a retainer that acts like a wrench lock a bolt tight?" Today, many industries use the retainer-based locking fastener for critical applications.

At the drag strip, fasteners hold the hub bushings on the rear-end assembly of 7,000-hp top-fuelers. "You could wreck a $20,000 rear end simply because four screws came loose. And somebody could get hurt," says Jeff Capek of Strange Engineering, a Morton Grove, Ill., manufacturer of racing equipment. Capek tested a prototype fastener from Stage 8 and has had no problems in field trials.

The fastener virtually eliminates critical joint failures. The GrooveLok fastener acts like a wrench locked onto a bolt head. The locking retainer can be braced against a frame, casting, or other protrusion, thereby locking the bolt or nut in place. Bridge retainers can fit over two or three bolts, locking them together, or a retainer can be bent over an edge or frame.

Sponsored Recommendations

April 16, 2025
Clean. Compact. Less heat.
April 16, 2025
SEW-EURODRIVE Introduces DR2C motor, IE5 Ultra-Premium Efficiency Motor
March 31, 2025
Unlike passive products - made of simple carbon springs - the bionic prostheses developed by Revival Bionics are propulsive, equipped with a motor and an artificial Achilles tendon...
March 31, 2025
Electric drives are a key technology for the performance of machines, robots, and power tools. Download this guide for an introduction to high-quality mechatronic drive systems...

Voice your opinion!

To join the conversation, and become an exclusive member of Machine Design, create an account today!