Dasqua 0-1 Inch Micrometer vs 12 Inch Combination Square
By Products for bench top machinists | LittleMachineShop.com | Published: 2026-11-04
Category: 購買指南
A Dasqua 0-1 inch micrometer and a 12 inch 4R combination square solve different measuring jobs. Use this guide to pick the right one for your bench work.
Quick answer
Buy the Dasqua 0-1 inch micrometer when you need precise outside diameter or thickness readings to 0.0001 inch. Buy the 12 inch 4R combination square when you need setup, layout, height, depth, or angle checks. If your bench work includes both inspection and setup, they complement each other rather than compete.
Resolution and accuracy are not the same job
The micrometer resolves 0.0001 inch with an accuracy of 0.00015 inch, so it is built for checking a single dimension to a tight tolerance. The combination square reads in 8ths, 16ths, 32nds, and 64ths with an accuracy of plus or minus 15 minutes, which is about layout and setup, not sub-thousandth inspection.
That difference matters at the bench: a square tells you whether a setup is square, parallel, or at the angle you intended; a micrometer tells you whether the part that came off that setup is the size you intended.
Where each tool earns its place
The 4R square scale is the practical choice for general bench work because the four graduations cover most layout and height checks without swapping blades. The center head and protractor in the set extend it to round work and angle setups, which is why it often stays on the bench rather than in a drawer.
The micrometer's ratchet stop and lock lever support repeatable readings on a batch of parts. Its carbide faces resist wear at the contact points, and the forged steel frame adds rigidity for consistent feel. None of that helps with layout, and the square cannot substitute for a dimensional inspection tool.
The trade-off: cost and coverage
At catalog prices of USD 25.16 for the micrometer and USD 71.96 for the square set, the square costs more because it bundles four heads and a 12 inch blade. The micrometer covers a narrower 0-1 inch range but delivers far finer resolution. Neither catalog record lists a calibration certificate, so if your work requires documented calibration, plan for that separately rather than assuming it is included.
Decision rules for bench measuring tools
- If the task is setup or layout: Choose the combination square set. Use the square head for 90 and 45 degree checks, the center head for round stock, and the protractor for angle setups. A square answers 'is this setup correct?' before you cut.
- If the task is dimensional inspection: Choose the 0-1 inch micrometer. Measure outside diameters and thicknesses within its 0-1 inch range and read to 0.0001 inch. Use the ratchet stop for consistent force and the lock lever to hold a reading.
- If you need both setup and inspection: Buy both. The square handles layout and fixturing, and the micrometer verifies the finished dimension. They do not overlap in function. Budget for both rather than stretching one tool beyond its job.
- If your part is larger than 1 inch: The micrometer's 0-1 inch range will not cover it. Plan for a different range or a different measuring method; do not assume this micrometer can be extended. Check the range against your largest expected dimension before ordering.
- If you need documented calibration: Neither catalog record states that a calibration certificate is included. Confirm that separately before relying on either tool for traceable inspection. Treat calibration paperwork as a separate purchasing decision.
Product facts at a glance
- Combination Square Set, 12" 4R, Dasqua: 12 inch 4R blade graduated in 8ths, 16ths, 32nds, and 64ths; includes square, center, and protractor heads. The four graduations and three heads cover layout, height, depth, round-work centering, and angle setup with one tool.
Combination Square Set, 12" 4R, Dasqua - Micrometer, 0-1", Dasqua: 0-1 inch range with 0.0001 inch graduations, 0.00015 inch accuracy, carbide faces, ratchet stop, and lock lever. It gives repeatable sub-thousandth readings on outside dimensions, which a square cannot provide.
Micrometer, 0-1", Dasqua
Which bench machinist should buy which
Best for
- Bench machinists who need repeatable outside-diameter and thickness readings to 0.0001 inch
- Setup and layout work that needs square, center, and protractor functions in one 12 inch tool
Not for
- Measuring features larger than 1 inch with the micrometer
- Sub-thousandth dimensional inspection with the combination square alone
