MITUTOYO SERIES 369 DISC MICROMETER NON ROTATING SPINDLE TYPE

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▪Can be used for making root tangent measurements on spur gears and helical gears.
▪Determination of the root tangent length: refer to "Quick Guide to Precision Measuring Instruments"
▪Non-rotating spindle eliminates torque on - workpiece.
▪Measurable range of gear pitch: 0.5 to 6 module.
▪Equipped with Ratchet Stop for constant measuring force.

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MITUTOYO SERIES 369 DISC MICROMETER NON ROTATING SPINDLE TYPE

Product Overview

The Mitutoyo Series 369 Non-Rotating Spindle Type Disc Micrometer is a precision measuring instrument designed for making root tangent measurements on spur gears and helical gears. Equipped with a non-rotating spindle that eliminates torque on the workpiece and a Ratchet Stop for constant measuring force, it ensures high repeatability and accuracy in gear inspection.

Key Features & Capabilities

Gear Measurement: Designed specifically for root tangent measurements on spur gears and helical gears.
Non-Rotating Spindle: Eliminates rotational torque on the workpiece during measurement.
Gear Pitch Range: Measurable range of gear pitch from 0.5 to 6 module.
Constant Measuring Force: Equipped with a Ratchet Stop mechanism.
Digital Display: Features Digimatic output capabilities with SPC data output for quality control and documentation.
Position Detection: Utilizes an electromagnetic rotary sensor.
Power Source: Operates on an SR44 battery (1 pc., 938882 included as standard for operational checks) with an approximate battery life of 2.4 years under normal use.

Technical Specifications

Metric Models (With SPC Data Output)

Code No.	Range (mm)	Resolution (mm)	Anvil dia. (mm)	Maximum permissible error $J_{MPE}$ (µm)	Flatness (µm)	Parallelism (µm)	Measuring force (N)
369-250-30	0 - 25	0.001	ø20	±4	1	4	3 - 8
369-251-30	25 - 50	0.001	ø20	±4	1	4	3 - 8
369-252-30	50 - 75	0.001	ø20	±6	1	6	3 - 8
369-253-30	75 - 100	0.001	ø20	±6	1	6	3 - 8

Inch/Metric Models (With SPC Data Output)

Code No.	Range (in)	Resolution	Anvil dia. (in)	Maximum permissible error $J_{MPE}$ (in)	Flatness (in)	Parallelism (in)	Measuring force (N)
369-350-30	0 - 1	0.00005 in / 0.001 mm	ø0.787	±0.0002	0.00004	0.0002	3 - 8
369-351-30	1 - 2	0.00005 in / 0.001 mm	ø0.787	±0.0002	0.00004	0.0002	3 - 8
369-352-30	2 - 3	0.00005 in / 0.001 mm	ø0.787	±0.0003	0.00004	0.0003	3 - 8
369-353-30	3 - 4	0.00005 in / 0.001 mm	ø0.787	±0.0003	0.00004	0.0003	3 - 8

Standard Accessories

Setting standard (1 pc., supplied with models over 25 mm / 1 in ranges; 0 to 25 mm / 0 to 1 in models exclude setting standard)
Spanner (Code No. 301336, 1 pc.)