Traditional Depth Micrometer
Micrometer Ball Attachment
MICROMETERS
At a Glance
At a Glance
• Can be fitted to the anvil or spindle on external micrometer series 1961, 1965 and 1966 to enable round or irregular surfaces to be measured
• Complies with BS6468:1984
892M
Features 890 Series
• Fixed depth rod, 6.5mm diameter • 63.5mm / 2 1/2" base length 16mm / 0.63" width • 'Speeder' type ratchet • Lock screw Features 891 Series • Interchangeable depth rods, 4.5mm diameter • 63.5mm / 2 1/2" base length, 16mm / 0.63" width Features 891 Series
Features
• The ball is hardened and moves freely to allow contact with the object being measured
Note: Always deduct the ball diameter from any reading.
878M
890M
Micrometer Ball Attachment
264
265
Traditional Depth Micrometer
Diameter (mm)
Diameter (inch)
Code No
Description
Range (mm)
Range (inch)
Code No
Code No
878M
6.5mm and 6.8mm
6.5 ball
• As 891 Series except for: 100mm / 4" base length
890M
890
0-25
0-1
878
0.256" and 0.268"
0.250 ball
891M75
8913
0-75
0-3
Note 1 of each spindle size supplied
891M150
8916
0-150
0-6
891M300
89112
0-300
0-12
892M75
8923
0-75
0-3
892M150
8926
0-150
0-6
892M300
89212
0-300
0-12
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