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MaraMeter 844 NR

Self-centering Dial Bore Gage

FEATURES

• Measuring head consists of a
carbide tipped, movable
measuring bolt and an opposing
interchangeable stationary anvil
with carbide ball
• Stationary measuring bolt can
pivot through 180°, giving rise to
a very long return travel path of
up to 40% of the measured bore
• Movements of the measuring
bolt are transmitted to the Application:
indicating instrument via the ring
segment
• The broad centering bridge • For measuring poorly accessible bore diameters, grooves and recesses
ensures automatic centering in
the bore
• Resistant to temperature because
the shaft and transfer rod are
made of heat resistant Invar steel TECHNICAL DATA
• Carbide tipped measuring
contacts for high wear resistance Order no. 4474580 4474590 4474600 4474610 4474620 4474630
• Constant measuring force thanks Product type 844 NR
to built-in and independent Measuring range mm 50 – 70 60 – 100 80 – 150 120 – 220 180 – 360 290 – 530
measuring force spring Measuring range inch 2 – 2.8” 2.4 – 4” 3.2 – 6” 4.7 – 8.7” 7.1 – 14.2” 11.4
preventing external interference – 20.7”
• Universally applicable and Design
extremely versatile • For measuring poorly accessible bore diameters, grooves and
- Each instrument spans a broad recesses
measuring range Measuring depth mm 60 95 107 148 170
- Quick and easy to adjust to any Error limit G e µm 2 3
size (within its range) Repeatability f µm 1 1.5
• Invar steel has a particularly low w
expansion coefficient Order no. a b c d e f
- instrument totally insensitive to
any kind of heat (including mm mm mm mm mm mm
user body heat and increased 4474580 5 12 60 60 203 6
ambient temperature) 4474590 7 15 110 80 264 8 d
• Package contains: measuring 4474600 7 15 110 80 264 8
holder, measuring head, anvil 4474610 7.5 15 110 80 264 10 e
spindle, wooden case, excludes 4474620 11 23 150 90 343 10
indicator b
4474630 15 30 170 90 409 10
c
a
f
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

416 MaraMeter | Indicating Measuring Instruments