Thielenhaus Technologies CNC Grinding Machines

Thielenhaus BearingStar 120

Q: How much does the Thielenhaus BearingStar 120 cost?

The price estimate for the Thielenhaus BearingStar 120 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-120#price; the request is passed to Thielenhaus Technologies or an authorised dealer.

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

Key Specifications

outer ring outside diameter

60 – 120 mm (2.4 – 4.7 in)

inner ring inside diameter

30 – 80 mm (1.2 – 3.1 in)

ring width

12 – 40 mm (0.47 – 1.6 in)

workpiece spindle speed

0 – 6,000 rpm

oscillation frequency

0 – 1,200 double stroke/min

oscillation angle

±0 – 18°

How much does the Thielenhaus BearingStar 120 cost?

Price estimate

Uncertain

We do not have a price for the Thielenhaus BearingStar 120 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 120 is the larger of the two machines on Thielenhaus's shared BS 90 / BS 120 data sheet. It takes outer rings of 60 – 120 mm (2.4 – 4.7 in) outside diameter, inner rings of 30 – 80 mm (1.2 – 3.1 in) inside diameter and ring widths of 12 – 40 mm (0.47 – 1.6 in).

Only those three rows differ from the BearingStar 90. Spindle speed, oscillation and stone pressure are printed once for both machines: 0 – 6,000 rpm at the workpiece spindle, 0 – 1,200 double strokes per minute, an oscillation angle of ±0 – 18°, a linear stroke of 0 – 6 mm (0 – 0.24 in) and 0 – 170 N of stone contact pressure. The bigger rings run on the same spindle and stone ranges as the smaller ones, so the choice between the two machines is about ring size and not about process capability.

The size ranges overlap. Outer rings from 60 mm up to the 90 mm limit of the BearingStar 90 fit either machine, and so do inner rings between 30 mm and 50 mm. Above this machine the next step is the BearingStar 200, which starts at 85 mm outside diameter and works with a stone contact pressure of 80 – 360 N.

Configuration follows the shared data sheet: 1 or 2 machining stations, 1-step machining on a 1-station machine and 1- or 2-step machining as desired on a 2-station machine. Oscillation is mechanical, radial or linear, with mechanical adjustment of the raceway position, and Thielenhaus states P2 raceway quality. The maker's website shows a 90 series but not this size, so confirm with Thielenhaus that it is still offered.

Full Specifications

Parameter	Value
Outer Ring Outside Diameter	60 – 120 mm (2.4 – 4.7 in)
Inner Ring Inside Diameter	30 – 80 mm (1.2 – 3.1 in)
Ring Width	12 – 40 mm (0.47 – 1.6 in)
Workpiece Spindle Speed	0 – 6,000 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	0 – 170 N
Machining Stations	1 or 2

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

Strengths & Limitations

Strengths

Outer rings of 60 – 120 mm outside diameter and inner rings of 30 – 80 mm inside diameter
Ring widths of 12 – 40 mm, against 8 – 35 mm on the BearingStar 90
1 or 2 machining stations, with 1- or 2-step machining on the 2-station machine
Mechanical radial or linear oscillation with an angle of ±0 – 18° and a stroke of 0 – 6 mm
P2 raceway quality, with outer or inner rings in one machine

Limitations

Stone contact pressure is limited to 0 – 170 N; the BearingStar 200 offers 80 – 360 N
Oscillation and raceway position are adjusted mechanically according to the shared data sheet
No technical data for weight, footprint or connections are printed
Narrowest ring is 12 mm wide; the data sheet sends anything narrower to the BearingStar 90

Best For

Bearing rings up to 120 mm outer ring outside diameter Inner rings up to 80 mm inside diameter 1- or 2-step raceway finishing of ball and roller bearing rings Ring programmes that go past the 90 mm limit of the BearingStar 90

Frequently Asked Questions

01 How does the BearingStar 120 differ from the BearingStar 90?

In ring size only, as far as the data sheet shows. The BearingStar 120 takes 60 – 120 mm outside diameter, 30 – 80 mm inside diameter and 12 – 40 mm width. The BearingStar 90 takes 26 – 90 mm, 10 – 50 mm and 8 – 35 mm. Spindle speed, oscillation and stone contact pressure are printed as common values.

02 What spindle speed and oscillation does it offer?

The workpiece spindle runs from 0 – 6,000 rpm. Oscillation frequency is 0 – 1,200 double stroke/min, the oscillation angle ±0 – 18° and the linear oscillation stroke 0 – 6 mm (0 – 0.24 in). Stone contact pressure is adjustable from 0 – 170 N.

03 Which ring types can it finish?

Thielenhaus lists 1- or 2-row radial ball bearings, axial ball bearings, 1- or 2-row angular ball bearings, cylindrical roller bearings and tapered roller bearings. Outer or inner rings are machined in one machine, with mechanical radial or linear oscillation.

04 When is the BearingStar 200 the better fit?

When rings exceed 120 mm outside diameter or need more stone force. The BearingStar 200 covers 85 – 200 mm outside diameter with 80 – 360 N of stone contact pressure, but its workpiece spindle is limited to 3,000 rpm and its narrowest ring is 15 mm.