At CHS Machine Shop, we provide precision crankshaft grinding, polishing, and repair services to restore proper journal geometry, smooth rotation, and long-term strength to your engine’s bottom end. Our team uses advanced machining equipment to bring worn, damaged, or out-of-spec crankshafts back to OEM tolerances or performance-grade specifications.

Whether you’re working on a daily driver, marine engine, diesel work truck, or high-performance build, CHS delivers accurate machining and reliable results every time.

Comprehensive Crankshaft Services

Crankshaft Inspection & Measuring

We begin with a detailed inspection of the crankshaft to identify journal wear, scoring, taper, twist, out-of-round issues, cracks, and misalignment. Accurate measurements allow us to determine the exact machining required.

Crack Detection & Magnaflux Testing

We use professional crack-detection methods to ensure the crankshaft is structurally sound for machining and reuse. This prevents failures during assembly or high-load operation.

Crankshaft Grinding

Our precision grinding equipment restores journal sizes, roundness, and smoothness to exact tolerances. Grinding eliminates scoring, heat damage, and wear—ensuring consistent oil clearance and long-term reliability.

Crankshaft Polishing

After grinding, we polish the journals to a mirror-like finish to improve oil film retention and reduce friction. Polishing improves efficiency, smoothness, and bearing life.

Crankshaft Straightening

Bent or twisted crankshafts are corrected using precision straightening procedures. This restores correct rotation, reduces vibration, and prevents engine damage.

Journal Welding & Undersize Repairs

Damaged journals can be restored through welding and precision machining to ensure proper size and hardness for future use.

Crankshaft Balancing

We perform dynamic balancing to reduce engine vibration, improve longevity, and enhance overall performance, especially critical for performance and high-RPM engines.

Keyway & Thread Repairs

We restore damaged keyways and threads to ensure proper fitment of harmonic balancers and engine components.

We Service All Types of Crankshafts

• Automotive & light trucks
• Diesel engines
• Marine applications
• High-performance & racing engines
• Industrial and agricultural engines
• Classic & restoration projects

Signs Your Crankshaft May Need Machining

• Low oil pressure
• Rod knock or bottom-end noise
• Bearing failure
• Metal shavings in oil
• Vibration or imbalance
• Overheating the bottom end
• Scored or worn journals
• Excessive engine wear

Why Choose CHS Machine Shop?

✔ Over 20 years of engine machining expertise
✔ State-of-the-art equipment for precision results
✔ Quick turnaround times
✔ Trusted by dealers, repair shops, and engine builders
✔ Automotive, diesel, marine, and performance engine specialists
✔ Honest communication and fair pricing