Crankshaft Drilling Pin Fixture Tool Balancer Bolt for Chevy 230 283 327

Crankshaft Drilling Pin Fixture Tool Balancer Bolt for Chevy

This crankshaft drilling pin fixture tool balancer bolt for Chevy allows precise alignment and drilling of the crankshaft snout to pin the harmonic balancer on early small-block engines.

Overview

This crankshaft drilling pin fixture tool balancer bolt is a specialty engine building tool designed for vintage small-block engines. It guides the drill bit to create a precise pin slot in the crankshaft snout, preventing the harmonic balancer from spinning. This crankshaft drilling pin fixture tool balancer bolt is designed for engine builders and classic car enthusiasts performing high-performance modifications.

Built For Performance

• Hardened steel guide ensures straight, accurate drilling without bit deflection.
• Specifically threaded balancer bolt secures the fixture firmly to the crankshaft snout.
• Facilitates pinning the harmonic balancer to prevent rotation on high-RPM builds.
• Saves time and prevents costly crankshaft damage by eliminating alignment guesswork.

Fits These Machines

• for Chevy 230
• for Chevy 283
• for Chevy 327

On-The-Job Use

• Pinning the harmonic balancer during a high-performance engine assembly.
• Modifying vintage crankshafts that lacked factory keyways or pin slots.
• Preventing balancer slippage on modified street or race engines.

Specs At A Glance

Good To Know

Q: Why is pinning the harmonic balancer necessary? A: On older engines with non-keyed crankshafts, high engine speeds or supercharger loads can cause the balancer to spin on the snout, throwing off engine timing and causing damage.

Q: Does this kit include the drill bit and pins? A: This listing is for the drilling fixture tool and the securing balancer bolt; drill bits and dowel pins must be sourced separately.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.