Starrett 696MZ Crankshaft Distortion Dial/Strain Gage with 696B Balancing Attachment, 61-458mm Range

The Starrett 696MZ is a professional-grade Crankshaft Distortion Dial/Strain Gage designed for checking bearing alignment and shaft deflection without dismantling the engine. Developed in collaboration with Hartford Steam Boiler, this precision inside measuring gage is the trusted choice of engine inspectors worldwide.

This gage checks the distortion of crankshaft webs, providing a direct indication of existing misalignment or excessive bearing wear. It is used on all diesel engine shafts and center crankshafts on any type of engine or compressor, and can also be applied as a strain gage on engine frames while the engine is in operation. A comparison of readings taken at top and bottom positions identifies any misalignment of cylinder and frame that could result in local over-stress and eventual frame cracking.

Key Features:

• Measuring range: 61–458mm (approximately 2-3/8" to 18") using included rods and extension
• Dial indicator movement: approximately 4mm (5/32")
• Graduation: 0.02mm
• Dial reading: 0-50-0 with 1mm per revolution
• Dial color: Yellow face for high visibility
• Dial diameter: 1-29/64"
• Special spring tension makes the gage self-sustaining in any position without sacrificing rigidity — hands-free operation
• Conical contact points are hardened, ground to a sharp point, with an approximate 60° included angle — stays in place on 45° surfaces
• Movable bezel allows adjustment of dial in relation to the hand
• Non-breakable crystal for durability in demanding shop environments
• Rods are marked to designate approximate overall length of the gage
• EDP: 52902 | Made in the USA

Includes 696B Balancing Attachment:

• For applications requiring the crank to be turned with the gage in place, the attachment can be adjusted to maintain the indicator face upward or in any desired position
• Installs by removing the knurled clamping nut and positioning the unit over the hubs on two sides of the indicator head
• A spring plunger provides friction to hold the balance in proper relation to position
• Nickel-plated parts for corrosion resistance

What's Included: Strain gage, 696B balancing attachment, 10 rods, 1 extension, and storage case.

The Starrett 696MZ is an essential precision tool for marine, industrial, and heavy equipment engine maintenance where accurate crankshaft and frame distortion measurement is critical.