Gleason 350GMS Gear Metrology System

Est. $800,000 – $1,500,000 Updated 2026-08-10

Key Specifications

Maximum Workpiece Diameter

350 mm (13.8 in)

Maximum Module

Maximum Face Width

350 mm (13.8 in)

Grinding Wheel Speed

Up to 63 m/s

Number of CNC Axes

Gear Quality

AGMA 13 / DIN 3

Overview

The Gleason 350GMS is a gear metrology system — in Gleason's own words, a machine for measuring gears and splines up to 350 mm. The GMS designation identifies Gleason's gear measurement line. The 350GMS inspects gears; it does not produce them, and it should not be confused with the grinding machines that share the same part-size class.

Part capacity runs to 350 mm (13.8 in) diameter and 350 mm (13.8 in) face width, at modules up to 6, with measurement carried out across five CNC axes. Splines fall inside its scope alongside gears, which matters to drivetrain producers whose parts mix involute gearing with splined shafts and hubs — both can be qualified on one instrument instead of being split between a gear tester and a general-purpose CMM.

The 350GMS is specified for in-process and post-process gear gauging and is gantry loader ready. Those two capabilities together define where the machine belongs: inside the production cell rather than in a separate inspection room. Automated loading and on-cell measurement turn inspection from an end-of-batch audit into a feedback signal that upstream machines can act on while the batch is still running, which is the difference between correcting a process and scrapping a lot.

As with any metrology system, the 350GMS adds no production capacity of its own. Its return comes from detecting profile, lead, pitch, and runout deviation early, shortening first-article approval, and eliminating the scrap and rework that offline inspection catches too late to prevent.

Full Specifications

Parameter	Value
Maximum Workpiece Diameter	350 mm (13.8 in)
Maximum Module	6
Maximum Face Width	350 mm (13.8 in)
Grinding Wheel Speed	Up to 63 m/s
Number Of CNC Axes	5
Gear Quality	AGMA 13 / DIN 3
Grinding Method	Continuous generating grinding
Wheel Dressing	Integrated CNC diamond dresser
Measurement	In-process and post-process gear gauging
Automation Interface	Gantry loader ready
Capacity	90,000 kg

Specifications compiled from manufacturer literature and industry references. Not independently verified against a published spec sheet — confirm with the manufacturer or an authorised dealer before making a purchasing decision.

Strengths & Limitations

Strengths

Measures both gears and splines up to 350 mm diameter and 350 mm (13.8 in) face width on a single instrument
Five CNC axes for gear and spline measurement
Specified for in-process as well as post-process gear gauging, keeping inspection inside the production loop
Gantry loader ready, so measurement can be automated into a cell rather than run as a manual offline step
Module capacity to 6 covers the common automotive and industrial transmission gear range

Limitations

350 mm diameter and module 6 cap the part range — larger gears require a bigger metrology system
Published specification does not include measurement accuracy or uncertainty figures, so capability against a target gear quality grade must be confirmed with Gleason before purchase
As inspection equipment it produces no parts; the business case rests on scrap reduction, rework avoidance, and first-article turnaround
Full value depends on integration with the producing machines — measurement that is not fed back into a correction loop recovers only part of the investment

Best For

Gear and spline producers inspecting parts up to 350 mm inside a production quality loop Automated cells that need gantry-loaded in-process gauging rather than an offline inspection room Drivetrain manufacturers qualifying both involute gearing and splined components on one instrument Operations feeding measured deviation back to gear cutting and grinding machines as correction data

Frequently Asked Questions

01 Is the Gleason 350GMS a gear grinding machine?

No. GMS is Gleason's gear metrology system designation. The 350GMS measures gears and splines up to 350 mm — it does not grind, cut, or otherwise machine them. It belongs in the quality loop alongside gear production machines, not in place of one.

02 What can the 350GMS measure?

Gears and splines up to 350 mm (13.8 in) diameter, with face widths to 350 mm (13.8 in) and modules up to 6. Measurement is carried out on five CNC axes.

03 Can the 350GMS be automated into a production cell?

Yes. It is gantry loader ready and specified for in-process as well as post-process gear gauging, which allows it to be loaded automatically and run as an inline inspection station inside a gear production cell rather than as a separate offline operation.

04 Where does a gear metrology system sit in gear production?

After the gear-producing operations — soft cutting, heat treatment, and hard finishing. It quantifies how far the finished flanks deviate from the intended geometry, releases or rejects first articles, and generates the correction data used to adjust the producing machines. Its output is a measurement report, not a part.