Tubular Inside Micrometers
SERIES 137 – Extension Rod Type, Up to 1500mm/
SERIES 139 – Extension Pipe Type, Up to 2100mm/
SERIES 140 – Extension Pipe Type, Up to 5000mm
FEATURES
Wide range of ID measurements by combining extension rods (pipes) and anvils with the micrometer head.
Carbide-tipped measuring faces. (Economy models which have not carbide tips are also available on the 137 series.)
The 139 series uses highly-durable extension pipes.
The 140 series uses large-diameter extension pipes.
SPECIFICATIONS
Accuracy
Series 137, 139: +/-(3+n+L/50)µm [+/-(.00015+.00005n+.00005 (L/2))”]*
Series 140: +/-(7+n+L/50) µm [+/-(.0003+.00005n+.00005 (L/2))”]*
*n = Number of rod, L = Maximum measuring length (mm) [(inch)], Fraction rounded up
Metric	Extension pipe type
Range	Order No.	Graduation	Travel of micrometer head		Extension pipes
1000-2000mm	140-157	0.01mm	50mm		50mm, 100mm (2 pcs.), 200mm, 500mm
1000-3000mm	140-158	0.01mm	50mm		50mm, 100mm (2 pcs.), 200mm, 500mm, 1000mm
1000-4000mm	140-159	0.01mm	50mm		50mm, 100mm (2 pcs.), 200mm, 500mm, 1000mm (2 pcs.)
1000-5000mm	140-160	0.01mm	50mm		50mm, 100mm (2 pcs.), 200mm, 500mm, 1000mm (3 pcs.)
Inch	Extension pipe type
Range	Order No.	Graduation	Travel of micrometer head		Extension pipes
40”- 80”	140-161	.001”	2”		2”, 4” (2 pcs.), 8”, 20”
40”- 120”	140-162	.001”	2”		2”, 4” (2 pcs.), 8”, 20”, 40”
40”- 160”	140-163	.001”	2”		2”, 4” (2 pcs.), 8”, 20”, 40” (2 pcs.)
40”- 200”	140-164	.001”	2”		2”, 4” (2 pcs.), 8”, 20”, 40” (3 pcs.)