1 in Dia 3 Bolt BBF Crankshaft Mandrel
1" Dia 3 & 4 Bolt BBF Crankshaft Mandrel

1" Dia Crankshaft Mandrel for Big Block Ford

4 Bolt Ford & 3 Bolt Chevy Balancer Mount Design
Part # CM203A
In stock - Usually ships in 1-2 Business Days
Only $127.00 ea
Features: The BBF Mandrel uses either the 4 bolt Ford or 3 bolt Chevy pattern to mount the mandrel and the back is recessed to accept the BBF hub on the balancer, which centers the mandrel.
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Compatible with MSD Crank Trigger Wheels - 3 Bolt Chevy or 4 Bolt Ford Mount

This 6061 T6 Aluminum 3-bolt Crankshaft Mandrel with 1" industry standard shaft size attaches to front of balancer and locates with a lip on the balancer for perfect concentricity. Uses either the 4 bolt ford or 3 bolt Chevy pattern to mount the mandrel and the back is recessed to accept the BBF hub on the balancer, which centers the mandrel. It utilizes a 1/8" standard keyway slot which allows you to use this mandrel with pulleys from many different manufactures, including GZ Motorsports. A crank trigger wheel may be installed on the front of the mandrel or on the balancer with the mandrel installed over it. The mandrel may be drilled to 1/2" for use with a long crank bolt if desired, GZ Motorsports can do this upon request.

All mandrels are designed to be attached to the balancer using the pulley mounting holes located on the balancer. This allows the crank bolt and washer to remain in place as required by aftermarket balancer manufactures. All mandrels come with a 4" long spacer so that each mandrel pulley can be accurately located on the mandrel by cutting each to length and an end cap and bolt. The mandrels can be shortened as desired as the threaded 7/16 center hole is 2" deep. Each mandrel is of length to allow a mandrel pulley to be at a maximum distance of 4.5" from the back side mounting face, or face of balancer. All mandrels are compatible with crank trigger wheels either located on the balancer, or mandrel side.

Specifications

  • 6061 T6 Aluminum
  • Both 3 Bolt Chevy & 4 Bolt Ford Pulley Mount Patterns
  • Industry Standard 1" Diameter Shaft
  • 1/8" Keyway
  • Includes Mounting Hardware Shown in Photo