Mitutoyo 0 to 4" Depth Micrometer, 2.5" Base

The Mitutoyo Series 129 depth micrometer is an inch, analog depth micrometer with interchangeable rods. The 4mm diameter rods have a lapped measuring end and swap in and out, so one micrometer covers a wide depth range. It is offered in three versions: 0 to 4" with a 2.5" base, 0 to 6" with a 2.5" base, and 0 to 6" with a 4" base.

Graduation is the smallest mark on the thimble, here .001". Accuracy is a separate figure. The micrometer head feed is accurate to ±.00015" (3µm), and a zero point error of ±.0002" (4µm) on the rods. A ratchet stop gives a steady measuring force and a lock holds the rod in place. The 4" base is wider and sits more steadily on larger parts. Choose the base to suit the part, and the range to suit the deepest hole you measure.

Where this product is used

• Measuring the depth of holes, slots and steps
• Checking shoulder and recess depths in the toolroom
• Inspection of machined parts in inches

Features

• Interchangeable rods of 4mm diameter with a lapped measuring end
• Rod length can be adjusted in 1" steps
• Ratchet stop for a steady measuring force and a rod lock
• Graduation of .001"
• Hardened tool steel base with a micro-lapped reference surface
• Measuring face is hardened, precision ground and micro-lapped
• 4 rods on the 0 to 4" set and 6 rods on the 0 to 6" sets
• Supplied in a fitted plastic case

Key specifications

Supplied with

• Depth micrometer with base
• Interchangeable rods (4 on the 0 to 4" set, 6 on the 0 to 6" sets)
• Spanner and hex spanner
• Fitted case

Choosing the right option