Thielenhaus Technologies CNC Grinding Machines

Thielenhaus BearingStar 320

Q: How much does the Thielenhaus BearingStar 320 cost?

The price estimate for the Thielenhaus BearingStar 320 is uncertain: we have no price for it that we can cite and no estimate we can stand behind, so we give no figure. Configuration, tooling, automation and installation move the final price substantially. A specific price can be requested at https://machinetoolindex.com/machines/thielenhaus-bearingstar-320#price; the request is passed to Thielenhaus Technologies or an authorised dealer.

Specs verified 2026-10-05 · thielenhaus.com Updated 2026-10-05

Thielenhaus BearingStar 320 Microfinish machine for bearing rings

Image: thielenhaus.com, Thielenhaus Technologies

Key Specifications

outer ring outside diameter

180 – 320 mm (7.1 – 12.6 in)

inner ring inner diameter

100 – 270 mm (3.9 – 10.6 in)

ring width

20 – 200 mm (0.79 – 7.9 in)

workpiece spindle speed

0 – 3,000 rpm

oscillation frequency

0 – 1,200 double stroke/min

oscillation angle

±0 – 18°

How much does the Thielenhaus BearingStar 320 cost?

Price estimate

Uncertain

We do not have a price for the Thielenhaus BearingStar 320 that we can stand behind, so we show no number. Configuration, options and installation move the final price a long way: a quote is the reliable figure.

Overview

The Thielenhaus BearingStar 320 handles outer rings of 180 – 320 mm (7.1 – 12.6 in) outside diameter and inner rings of 100 – 270 mm (3.9 – 10.6 in) inner diameter, with ring widths of 20 – 200 mm (0.79 – 7.9 in). The width range is the figure to notice. A ring 200 mm wide is a long raceway for one stone to cover, and the machine does it on a single machining station.

One station does not mean one step. Thielenhaus lists 1- or 2-step machining, and on the 1-station machine the outer raceway and board of tapered roller inner rings. This is also the smallest BearingStar size where spherical roller bearings appear in the ring type list, next to radial, axial and angular ball bearings and cylindrical and tapered roller bearings.

Two options are aimed at wide roller raceways and finished rings. Range velocity programming for crowned or logarithmic roller raceways is one; outer diameter polishing with a belt unit is the other, adding a second process on the same machine. Both are marked optional, so neither should be assumed in a base offer.

The process figures match the BearingStar 200: 0 – 3,000 rpm at the workpiece spindle, 80 – 360 N of stone contact pressure, ±0 – 18° of oscillation angle and 0 – 6 mm (0 – 0.24 in) of linear stroke. Rings above 320 mm move to the BearingStar 650, where the spindle is limited to 1,000 rpm.

Full Specifications

Parameter	Value
Outer Ring Outside Diameter	180 – 320 mm (7.1 – 12.6 in)
Inner Ring Inner Diameter	100 – 270 mm (3.9 – 10.6 in)
Ring Width	20 – 200 mm (0.79 – 7.9 in)
Workpiece Spindle Speed	0 – 3,000 rpm
Oscillation Frequency	0 – 1,200 double stroke/min
Oscillation Angle	±0 – 18°
Linear Oscillation Stroke	0 – 6 mm (0 – 0.24 in)
Stone Contact Pressure	80 – 360 N
Machining Stations	1

Specifications sourced from thielenhaus.com — verified 2026-10-05

Strengths & Limitations

Strengths

Ring widths of 20 – 200 mm, far beyond the 15 – 80 mm of the BearingStar 200
Spherical roller bearings are among the listed ring types
Outer raceway and board for tapered roller inner rings on the 1-station machine
Stone contact pressure of 80 – 360 N with an oscillation angle of ±0 – 18°
Outer diameter polishing with a belt unit can be added as an option

Limitations

Listed with 1 machining station only; the BearingStar 200 is offered with 1 or 2
Range velocity programming for crowned or logarithmic roller raceways is optional
Inner rings below 100 mm inner diameter are outside the range
No weight, footprint or connection data are printed in the technical data

Best For

Bearing rings up to 320 mm outer ring outside diameter Wide roller bearing rings up to 200 mm ring width Spherical and tapered roller bearing rings Crowned or logarithmic roller raceways, with the optional programming

Frequently Asked Questions

01 Which ring types does the BearingStar 320 finish?

1- or 2-row radial ball bearings, axial ball bearings, 1- or 2-row angular ball bearings, cylindrical roller bearings, tapered roller bearings and spherical roller bearings. Outer or inner rings run on one machine, and the outer raceway and board of tapered roller inner rings can be finished on the 1-station machine.

02 How wide a ring can it take?

Ring width is 20 – 200 mm (0.79 – 7.9 in). Outer ring outside diameter is 180 – 320 mm (7.1 – 12.6 in) and inner ring inner diameter 100 – 270 mm (3.9 – 10.6 in). For wider rings the BearingStar 650 goes to 300 mm ring width.

03 Can it produce logarithmic raceway profiles?

Thielenhaus lists range velocity programming for crowned or logarithmic roller raceways as an option on this machine. Its product page also names spherical and logarithmic raceways and zone speed programming for the 320 series. Ask which of these the base machine includes.

04 Is outer diameter polishing possible?

Yes, as an option. The machining solutions list outer diameter polishing with belt unit (optional), so a ring can have its raceway stone-finished and its outside diameter polished on the same machine. The stone side works with 80 – 360 N of contact pressure.