custom gages, inspection fixtures, & measurement tooling
Need a reliable way to measure a difficult feature in production?
Gromax designs custom gaging and inspection tooling around the feature, datum structure, tolerance, part condition, and measurement challenge.
Whether you’re checking true position, runout, profile, alignment, fit, or another difficult-to-measure relationship, we can help develop a practical production inspection approach.
what do you need to measure?
Not every characteristic is best checked the same way.
Gromax reviews the drawing, datum reference frame, tolerance, part geometry, inspection frequency, and production environment before recommending a gaging concept.
Height & Offset
Formed height, steps, shoulders, or relative position
Alignment & Coplanarity
Multiple features that must remain aligned or within a common plane.
Functional Fit
Mating, insertion, retention, or assembly acceptance
Multiple Characteristics
Several related dimensions checked in one controlled setup.
Hard-to-Access Features
Characteristics that are difficult to verify with conventional tools.
gaging approaches we can develop
The right gaging approach depends on the feature, tolerance, datum structure, inspection frequency, and production environment.
Functional & Go/No-Go Gages
Confirm fit, position, clearance, engagement, or other acceptance conditions.
Variable Fixture Gages
Locate the part consistently while indicators or probes measure actual dimensional variation from a reference.
Position Gages
Verify feature location relative to the defined datum reference frame, with MMC or LMC conditions incorporated where applicable.
Datum-Simulation Fixtures
Reproduce the intended datum structure so critical features are checked from the correct functional references.
Runout & Relationship Gages
Check runout, alignment, and coaxial relationships between rotating or related features.
Form & Profile Fixtures
Support and locate parts so bends, contours, offsets, and profiles can be measured consistently without distorting the part.
CMM & Vision Inspection Fixtures
Present parts consistently for CMM, vision, optical, or other inspection systems.
Combine several related checks into one controlled setup.
Check several related features in one setup, such as hole position, formed height, and contact location on switchgear terminals.
Production Inspection Fixtures
Durable tooling designed for repeatable loading, access, and frequent shop-floor inspection.
not sure how the feature should be measured?
A tight tolerance doesn’t automatically tell you the best production inspection method.
Gromax can review the drawing, GD&T, datum structure, part condition, inspection frequency, and available measurement equipment to help determine a practical gaging approach.
Already Have a CMM but Unsure It’s the Right Method?
We can review whether a dedicated fixture, comparative gage, functional check, or other inspection approach may provide a more repeatable production method for the characteristic being controlled.
from drawing to
production gage
We start with what must be controlled—not with a predetermined fixture design.
1. Review the Drawing
Identify critical characteristics, datums, GD&T, tolerances, and customer-defined requirements.
2. Define the Measurement Problem
Clarify what is difficult to inspect, how often it must be checked, and how the result will be used.
3. Establish the Datum Strategy
Determine how the part should be located and constrained without distortion or over-location.
4. Select the Measurement Method
Choose the most practical functional, comparative, variable, optical, CMM-supported, or other approach.
5. Design & Build the Gage
Develop locating, clamping, access, measurement, wear, and operator-use requirements.
6. Verify & Release
Confirm repeatable part location, suitable measurement resolution, fixture stability, and the required inspection method before production use.
parts & application we can review
Custom gaging isn’t limited to stamped parts. Gromax can review inspection challenges across a range of manufactured components.
Custom gaging can add value anywhere a production characteristic is difficult to verify consistently with standard measurement equipment.
Have a Measurement Problem You’d Like Us to Review?
Do not include Controlled Unclassified Information (CUI), ITAR-controlled technical data, or EAR-controlled export-controlled information in your initial email or RFQ submission.
If your request involves export-controlled or regulated technical data, note that in your message and we’ll provide secure transmission instructions.
Customer Confidentiality
& Export Control Notice
To protect customer confidentiality and controlled technical information, Gromax does not publicly display customer-specific drawings, specifications, or sensitive part details without appropriate authorization.
Images shown are illustrative only and are used to represent the types of parts, geometries, and manufacturing capabilities Gromax supports. They do not depict specific customer designs or proprietary technical data.