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Mahr - Self-Centering Bore Gages 844D
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 Features
- Measuring the diameter, roundness and conicity of bores
- Spring-loaded halves of measuring probe are split via expanding pin with precision lapped taper. This movement is transferred to indicating instrument
- Maximum wear-resistance due to hard chrome plating. From 4 mm alternatively with carbide tipped available on request
- Constant measuring force as a result of built-in spring thus eliminating user influence
- Highly versatile, each gage covers a large range. Within the respective limits, quickly and easily adjustable to any size and any type of measuring application
- Measuring probe, holder, depth extensions, right-angle attachments and depth stops are part of an extensive modular system
- Changable for indicating gage; analog or digital
- Measuring range 0.47mm to 18.60mm
- Compatible with Diatest products (Split ball probe)
Accuracy
Deviation of linearity
- ≤ 2% measuring ranges 0.47 - 1.55 mm
- ≤ 1% measuring ranges 1.5 - 18.6 mm
Repeatability
- 1 μm manual measurement
- ≤ 0.5% measurement with stand 844Kst and floating holder 844Kst
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Instruments - TecLock. 
