Precise PLUS/MINUS roller gauges mounted in the handle

Folding Plunger Limit Gauge (Go/No-Go) – Set of PLUS/MINUS Measuring Rollers in Handle – GCr15 Bearing Steel

An inspection tool for verifying hole tolerances in CNC processes, mold production and precision mechanics.

We offer

complete, ready-to-work limit test

, consisting of two precise measuring rollers (going side "GO" and non-going "NO-GO") embedded in an ergonomic handle. The tool is made to individual customer orders based on given tolerance deviations (accurate to hundredths of a millimeter), which allows for instant quality control (QC) on the production line.

Technical and Material Specification

The product is based on high-quality measuring rollers (pin gauge) with industrial parameters:

Available gradation (step):

The rollers are available in dimensions

0.01mm

.

Material:

High-quality bearing steel

GCr15

(Bearing Steel) – guaranteeing dimensional stability.

Hardness:

Hardening to level

58-63 HRC

, which provides extreme abrasion resistance.

Roller manufacturing tolerance:

±0.001mm.

Surface Finish:

Precision grinding and polishing, roughness Ra < 0.20 µm.

Working length of the roller:

50mm.

⚠️ IMPORTANT INFORMATION ABOUT DIMENSIONS

Please pay special attention when placing an order: Our rollers are manufactured with a pitch of every

0.01mm

.

✅

We produce dimensions:

e.g. 2.54 mm, 2.55 mm, 10.01 mm.

❌

We do NOT produce intermediate (micron) dimensions:

e.g. 2,546 mm, 2,555 mm.

Please round the required dimensions to two decimal places (up to 0.01 mm).

Product Configuration: PLUS/MINUS System

Unlike standard fixed gauges, our system allows for flexible tolerance selection. You get a "double-sided" tool that clearly determines whether the hole is within a given tolerance.

Each set includes:

"PLUS" roller

(usually the intransitive/NO-GO side).

"MINUS" roller

(usually passing side/GO).

Professional handle

with mounting.

Professional installation

– you get an integrated tool ready to use.

ORDERING INSTRUCTIONS – How to choose a test?

In order for us to prepare the test, you must provide specific values ​​(with an accuracy of 0.01 mm) in the order notes.

Step 1:

Select the range that covers your nominal diameter from the list of variants.

Step 2:

In the order notes, enter the parameters according to the diagram below. Remember that the sum of the diameter and tolerance should give a result with two decimal places.

DIAMETER:

[nominal value] mm

PLUS:

+[value] mm

MINUS:

• [value] mm

EXAMPLE OF CORRECT NOTATION:

Diameter: 14.50 mm

PLUS: +0.02 mm (resulting roller: 14.52 mm –

OK

)

MINUS: -0.05 mm (resulting roller: 14.45 mm –

OK

)

EXAMPLE OF AN INCORRECT ENTRY (We will not implement this):

Diameter: 2.50 mm

PLUS: +0.04

6

mm (resulting roller: 2.546 mm –

ERROR, not available

)

Solution:

Please order size 2.54 mm or 2.55 mm.

Application in industry

Roller gauges in the handle are necessary in:

CNC series production:

Quick verification of holes without the need to use delicate bore gauges.

Electronics and PCB:

Inspection of mounting holes.

Construction of molds and dies:

Precise fit of elements.

Why choose a composite test?

Economics:

You only replace the worn roller, not the entire tool.

Availability:

Immediate configuration with ready-made modules every 0.01 mm.

Ergonomics:

The handle thermally insulates the hand from the gauge, preventing thermal expansion of the roller.

FAQ – Frequently asked questions

Q: Can I order a 5.555 mm roller?

Oh no. Our rollers are only available in 0.01 mm increments. In this case, select the dimension 5.55 mm or 5.56 mm.

Q: What if I only provide the diameter without plus/minus?

A: We will contact you. You need to determine the upper and lower tolerances to create a limit gauge.

Q: Are the rollers rust-resistant?

A: GCr15 bearing steel is susceptible to corrosion, so we recommend preserving with oil after each use and storing in a dry place.

Optimize your quality control.

Select the range, enter the parameters (remembering the 0.01 mm increment) and order a ready-made test tailored to your needs!