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MaraMeter 844 NB

Self-centering Dial Bore Gage

FEATURES

• Measuring head consists of a
carbide tipped moving anvil and
an interchangeable stationary
anvil with a carbide 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 Application:
the shank and transfer rod are
made of heat resistant Invar steel
• Highly resistant to wear and tear • For blind holes, to measure almost to the base of a bore
because of carbide tipped
moving anvil
• Constant measuring force due to
built-in spring, eliminating user
influence TECHNICAL DATA
• Universally applicable and
extremely versatile Order no. 4474179 4474180 4474186
- Each instrument spans a broad Product type 844 NB
measuring range Measuring range mm 20 – 50 50 – 110 110 – 300
- Quick and easy to adjust to any Measuring range inch 0.79 – 2” 2 – 4.33” 4.33 – 11.81”
size (within its range)
• Invar steel has a particularly low Design For blind bores. Moveable anvil and stationary anvil carbide-tipped
expansion coefficient Error limit G e µm 4 3 2.5
- instrument totally insensitive to Repeatability f w µm 1
any kind of heat (including
user body heat and increased Order no. a b c d e
ambient temperature) mm mm mm mm mm
• Package contains: measuring 4474179 1.5 10 77 60 163
holder, measuring head, anvil
spindle, wooden case, excludes 4474180 1.5 12 60 60 144
indicator 4474186 2 18 90 90 163

e
b

c
a
ACCESSORIES

Order no. Product name Product
type

4333000 Millimess 5 µm, ± 130 µm 1004
4334000 Millimess 1 µm, ± 50 µm 1003
4335000 Millimess 0.5 µm, ± 25 µm 1002
4337662 Digital indicator, 0.0005 mm, 12.5 mm 1087 BR
4337664 Digital indicator, 0.0005 mm, 12.5 mm 1087 BRi

1004 1003 1002 1087 BR 1087 BRi

MaraMeter | Indicating Measuring Instruments 417