Mahr 4475003 Self-Centering Dial Bore Gage (844NH, 250 – 400mm/10 – 16”, 336mm)

Measuring the diameter, roundness and conical form of a bore as well as the distances of parallel plane surfaces

Product type: 844NH

Measuring range: 250 – 400mm/10 – 16”

Design: Standard, moveable anvil and stationary anvil carbide-tipped

Probe path: 2.6mm

Measuring depth: 336mm

Error limit Ge: 3µm

Repeatability fw: 1.5µm

Package contains: measuring holder, measuring head, anvil spindle, wooden case, excludes indicator

Accessories:

  • Millimess 0.5 µm, ± 25 µm, type 1002

  • Millimess 1 µm, ± 50 µm, type 1003

  • Millimess 5 µm, ± 130 µm, type 1004

  • Digital indicator, 0.0005 mm, 12.5 mm, type 1087 BR

  • Digital indicator, 0.0005 mm, 12.5 mm, type 1087 BRi

  • Holder, measuring span 0 – 70 mm, type 420 h

  • Holder, measuring span 0 – 120 mm, type 420 h

  • Holder, measuring span 100 – 220 mm, type 420 h

  • Holder, measuring span 100 – 420 mm , type420 h

  • Holder, measuring span 400 – 820 mm, type 420 h

  • Adjustment bridge (70 x 12 mm), for measuring range 18 – 250 mm (for 844 N), type 844 Neb

  • Adjustment bridge (165 x 17 mm), for measuring range 18 – 400 mm (for 844 N), type 844 Neb

  • Adjustment bridge (320 x 20 mm), for measuring range 18 – 800 mm (for 844 N), type 844 Neb

  • Short holder (18 – 50 mm), type 844 Ngk

  • Short holder (35 – 100 mm), type 844 Ngk

  • Short holder (100 – 250 mm), type 844 Ngk

  • Short holder (250 – 800 mm), type 844 Ngk

  • Measuring depth extension (250 mm) for measuring range 35 – 100 mm, type 844 Nv

  • Measuring depth extension (250 mm) for measuring range 100 – 250 mm, type 844 Nv

  • Measuring depth extension (500 mm) for measuring range 100 – 250 mm, type 844 Nv

  • Measuring depth extension (250 mm) for measuring range 250 – 800 mm, type 844 Nv

  • Measuring depth extension (500 mm) for measuring range 250 – 800 mm, type 844 Nv

  • Measuring depth extension (250 mm) for measuring range 18 – 50 mm, type 844 Nv

  • Right angle attachment, bore depth 45mm, for measuring range 18 – 50 mm, type 844 Nw 

  • Right angle attachment, bore depth 55mm, for measuring range 35 – 100 mm , type844 Nw

  • Right angle attachment, bore depth 70mm, for measuring range 100 – 250 mm , type844 Nw

  • Base for mounting holder 420 h up to 420 mm, type 844 ef

  • Measuring jaw (60 x 9.5 x 9 mm), for measuring range 18 – 800 mm (for 844 N), type 844 em

Detail

FEATURES

• Measuring head consists of a carbide tipped moving anvil and an interchangeable stationary anvil with a hardened steel ball 

• Transmission lever system transfers movement of movable anvil to indicating instrument 

• The broad centering bridge ensures automatic centering in the bore 

• Resistant to temperature because the shank and transfer rod are made of heat resistant Invar steel 

• Highly resistant to wear and tear because of carbide tipped  moving anvil 

• Constant measuring force due to built-in spring, eliminating user influence 

• Universally applicable and  extremely versatile - Each instrument spans a broad measuring range - Quick and easy to adjust to any size (within its range) 

• Extensive modular system is composed of measuring head, holder, extensions, Right angle attachments and depth stops 

• Invar steel has a particularly low expansion coefficient - instrument totally insensitive to any kind of heat (including user body heat and increased ambient temperature)


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