Mitutoyo 293-667-20 Digital Micrometer Quickmike

USD 577.11

High-speed digital micrometer featuring 25-55mm range, 0.001mm resolution, IP65 protection, non-rotating spindle, and a rapid 10mm-per-revolution feed rate.

SKU Mitutoyo-293-667-20 Category
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Mitutoyo 293-667-20 Digital Micrometer Quickmike

Model Identifier 293-667-20
Official Part Number 293-667-20
GTIN Standard 4946368736709

Technical Overview

High-speed digital micrometer featuring 25-55mm range, 0.001mm resolution, IP65 protection, non-rotating spindle, and a rapid 10mm-per-revolution feed rate.

Key Features

  • Wide measuring range of 25 - 55 mm with a digital step of 0.001 mm
  • Rapid spindle feed rate of 10 mm per thimble rotation (20x faster than standard micrometers)
  • Non-rotating spindle prevents damage to sensitive workpiece surfaces and avoids torsion on soft parts
  • IP65 protection level allows operation around splashing coolants, water, and grinding dust
  • Electrostatic capacity absolute linear sensor preserves the origin point even after power-off
  • Carbide-tipped, micro-lap finish measuring faces ensure high wear resistance and durability
  • Constant-force ratchet stop device ensures consistent pressure (5 to 12 N) for highly repeatable measurements
  • Large LCD display with 10 mm character height for easy reading
  • Equipped with Origin set, Zero-setting, Hold, Function lock, Auto power off, low voltage alarm, and SPC data output

Powered by a single SR44 silver oxide button cell battery with an exceptional battery life of approximately 5 years (approx. 18,000 hours of continuous use) under normal operating conditions. It features an auto power-off function that triggers after 20 minutes of inactivity to preserve battery life.

Technical Specification Matrix

ParameterValue
Measuring Range25 - 55 mm
Resolution (Digital Step)0.001 mm
Accuracy (Maximum Permissible Error)±2 µm
Flatness of Measuring Faces0.3 µm
Parallelism2 µm
Ingress Protection ClassIP65 (Dust-proof, Water jet protected)
Measuring Force5 - 12 N
Measuring Spindleø 6.35 mm, non-rotating
Spindle Pitch10 mm per revolution
Battery TypeSR44 (1 pc.)
Battery LifeApprox. 5 years under normal use
Data OutputYes (SPC-compatible via 6-pin cable)
Position DetectionElectrostatic capacity absolute encoder
Physical Weight (kg)0.34
Dimensions L x W x H (cm)22.4 x 10.6 x 3.6

Industrial Applications

1. Rapid In-Process Inspection of Varied Precision Machined Shafts

In high-throughput CNC turning operations, operators must measure shafts of varying diameters directly on the shop floor. Standard micrometers with a 0.5 mm per revolution pitch are too slow, creating a production bottleneck. This micrometer solves this with a rapid 10 mm per revolution spindle feed, allowing operators to adjust and measure different sizes up to 20 times faster. Its IP65 rating enables safe use around splashing coolants and metal cutting fluids without risking damage to the digital encoder.

Problem Solved

Bottlenecks in quality control on the shop floor caused by slow spindle adjustment speeds when inspecting workpieces of highly diverse diameters.

CNC turningSpindle feedIP65 protectionOutside diameterHigh-throughput inspection

2. Precision Measurement of Deformation-Sensitive Polymer Components

Engineers manufacturing high-precision rubber, plastic, or soft metal bushings with nominal sizes between 25 mm and 55 mm struggle with measurement errors caused by spindle rotation inducing shear forces or torsional deformation on the workpiece. This micrometer incorporates a non-rotating spindle and a constant-force ratchet stop (5 to 12 N), allowing the carbide measuring faces to close linearly on the material without inducing rotation-based torsion or compressive deformation, maintaining ±2 µm accuracy.

Problem Solved

Measurement inaccuracy and surface scratching on soft, delicate, or deformation-sensitive polymer materials due to rotational friction from standard micrometer spindles.

Non-rotating spindleDeformation-sensitiveConstant forceCarbide measuring facesPolymer bushings

3. Statistical Process Control (SPC) Integration in Automotive Component Assembly

In automated or semi-automated automotive assembly lines, critical metal pins with diameters ranging from 25 mm to 55 mm must be verified and logged in real-time to comply with ISO 9001 and trace quality metrics. The micrometer's built-in Digimatic SPC data output allows direct connection to automated SPC software (via optional cables or U-WAVE wireless modules). This enables error-free, instant logging of the ±2 µm accurate measurements with a simple button press, eliminating transcription errors.

Problem Solved

Human transcription errors and slow data logging times in high-volume, compliance-heavy manufacturing lines requiring SPC data tracking.

SPC data outputDigimatic interfaceAutomotive quality controlReal-time loggingMPE ±2 µm
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