JTEKT Toyoda GL4i-50

Est. $150,000 - $250,000 Possible older model Specs verified 2026-03-28 · machinio.com Updated 2026-10-03

This model was not found in JTEKT's current lineup when we checked on 2026-10-03 . It may be a superseded or older model; the specifications below are as we last recorded them.

JTEKT Toyoda GL4i-50 CNC Grinding Machines

Key Specifications

Weight

4,000 kg (8,800 lb)

Rapid Traverse

10,000 mm/min (394 IPM)

swing over table

320 mm (12.6 in)

distance between centers

500 mm (19.7 in)

max grinding diameter

300 mm (11.8 in)

max workpiece weight

150 kg (330 lb)

How much does the JTEKT Toyoda GL4i-50 cost?

Estimated price range

Est.$150,000 - $250,000

Our best estimate for a cnc grinding machine in this class — not a quote from JTEKT. Configuration moves it a long way.

Overview

The JTEKT Toyoda GL4i-50 is a CNC cylindrical grinder for parts up to 300 mm (11.8 in) in grinding diameter and 500 mm (19.7 in) between centers, with a 150 kg (330 lb) workpiece limit. Swing over the table is 320 mm (12.6 in). JTEKT does not show the model in its current lineup, and the listed figures have not been confirmed against a maker page.

The wheelhead is where the machine earns its place. Its spindle runs in the TOYODA STAT BEARING, described as a hydrostatic/hydrodynamic hybrid, with a spindle rotational accuracy of 0.016 microns. Wheel size is listed as 405 x 127 mm (16 x 5 in) with a maximum wheel width of 75 mm (3 in), and the wheel surface speed is 33 m/s (6,500 SFPM). That is a conventional-abrasive speed, and the 3.7 kW (5 hp) wheel spindle motor sets the stock removal rate. This is a finishing grinder for small and medium shafts, not a heavy plunge machine.

A 75 mm (3 in) wheel on a part that can be 500 mm (19.7 in) long means longer diameters are traverse ground or plunged in several steps. The workhead turns at 21 - 500 RPM, the minimum move increment is 0.00001 in (0.25 microns) and rapid traverse is 10,000 mm/min (394 IPM). The control is the TOYOPUC-GC70 and the machine weighs 4,000 kg (8,800 lb).

Full Specifications

Parameter	Value
Swing Over Table	320 mm (12.6 in)
Distance Between Centers	500 mm (19.7 in)
Max Grinding Diameter	300 mm (11.8 in)
Max Workpiece Weight	150 kg (330 lb)
Grinding Wheel Size	405 x 127 mm (16 x 5 in)
Max Wheel Width	75 mm (3 in)
Wheel Surface Speed	33 m/s (6,500 SFPM)
Wheel Spindle Motor	3.7 kW (5 hp)
Workhead Speed	21 - 500 RPM
Minimum Move Increment	0.00001 in (0.25 microns)
Rapid Traverse Rate	10,000 mm/min (394 IPM)
Spindle Bearing	TOYODA STAT BEARING (hydrostatic/hydrodynamic hybrid)
Spindle Rotational Accuracy	0.016 microns
Machine Weight	4,000 kg (8,800 lb)
CNC Control	TOYOPUC-GC70
Horsepower	208 hp
Spindle Bore	39.69 mm

Specifications sourced from machinio.com — verified 2026-03-28

Strengths & Limitations

Strengths

TOYODA STAT BEARING wheel spindle (hydrostatic/hydrodynamic hybrid) with 0.016 microns of rotational accuracy
Minimum move increment of 0.00001 in (0.25 microns)
300 mm (11.8 in) maximum grinding diameter with 500 mm (19.7 in) between centers
Workhead speed range of 21 - 500 RPM
Takes workpieces up to 150 kg (330 lb)

Limitations

The 3.7 kW (5 hp) wheel spindle motor limits heavy stock removal
Maximum wheel width is 75 mm (3 in), so longer diameters need traverse grinding or several plunges
Wheel surface speed is listed at 33 m/s (6,500 SFPM), with no higher-speed option in the table
500 mm (19.7 in) between centers and a 150 kg (330 lb) limit rule out long or heavy shafts

Best For

Shafts and pins up to 300 mm (11.8 in) in diameter and 500 mm (19.7 in) long Fine-finish diameters that depend on 0.016 microns of spindle rotational accuracy Workpieces up to 150 kg (330 lb) between centers Finish grinding with light stock on a 3.7 kW (5 hp) wheelhead

Frequently Asked Questions

01 What is the capacity of the GL4i-50?

The listed figures are a 320 mm (12.6 in) swing over the table, a 300 mm (11.8 in) maximum grinding diameter, 500 mm (19.7 in) between centers and a 150 kg (330 lb) maximum workpiece weight.

02 What grinding wheel does the GL4i-50 run?

The wheel size row reads 405 x 127 mm (16 x 5 in) and the maximum wheel width is 75 mm (3 in). Wheel surface speed is 33 m/s (6,500 SFPM), driven by a 3.7 kW (5 hp) wheel spindle motor.

03 What kind of wheel spindle bearing does it use?

The table lists the TOYODA STAT BEARING, described as a hydrostatic/hydrodynamic hybrid, with a spindle rotational accuracy of 0.016 microns. On a used machine, the condition of that spindle is the first thing to have checked.

04 How fine can the axes be positioned?

The minimum move increment is listed as 0.00001 in (0.25 microns). Rapid traverse is 10,000 mm/min (394 IPM), the workhead runs from 21 - 500 RPM, and the control is the TOYOPUC-GC70.