The tooling concept of Guhring’s ball race milling cutter
is simple, practice orientated and highly accurate• maximum rigidity and stability• highest precision• high process reliabiliy• consistently high manufacturing quality• simple and quick change of milling head• minimum machine downtime

PCBN ball race milling cutters
GUHRING - YOUR WORLD-WIDE PARTNER

BALL RACE MILLING CUTTERS FROM GUHRING– the high-performance solution for the machining of homokinetic joints
Homokinetic joints applied a millionfold in the drive train ofautomobiles place the highest demands on precision and quality.
But also the machining costs play a decisive role.
With Guhring’s PCBN-tipped ball race milling cutters the user
has perfect control of all of the factors.

The perfect solution
for the hard machining of joints
Ensure maximum quality and a highly efficient machining withshort primary process times as well as advantageous tooling costs
for the hard machining of ball joints in homokinetic joints.
With the new PCBN ball race milling cutters Guhring provides
made-to-measure tooling solutions for maximum cutting values
and tool life.
Guhring PCBN ball race milling cutters are convincing thanks
to high rigidity and stability. Thus they offer maximum processreliability and a consistently high manufacturing quality andaccuracy for the highly-stressed joints.

Soft machining
with made-to-measure tooling solutions
Also for the soft machining of homokinetic joints you can ensure the highly efficient machining with shortprimary process times and advantageous tooling costs with Guhring’s ball race milling cutters.
Guhring’s ball race milling cutters for soft machining are available 2-, 3-, or 4-fluted in solid carbide orwith CBN inserts brazed on to a steel base body.

Calculating the perfect tool geometry …
The complex know-how of Guhring’s ball race milling cutters is in the calculation of thegeometry. For this special software was developed. The perfect tool geometry is calculated
based on the forms and tolerances for inner and outer race specified by the user.
Essential factors are the contact angle, the race play and the lubrication of the later between
inner and outer race positioned balls as well as the approach angle of the ball race milling
cutter for the machining operation. Thanks to the software calculation closest tolerances
can be maintained.
Their practical suitability for the machining of inductively hardened steel with 58 to 62 HRC
Guhring’s ball race milling cutters demonstrate in comprehensive simulations and machining
tests at Guhring’s own research and development centre prior to series application.
When applied, the tools not only achieve the required tolerances but manufacture therequired contours with a long tool life. For example, a PCBN-tipped milling head withdiameter 20 mm achieves a tool life of 2500 components in volume production in theautomotive manufacturing sector.

for the calculation:

Kugelposition /KontaktbedingungenAuswahl desGelenktyps

Workpiece / joint partparameterisation

Gelenktyps
Auswahl desKontaktbedingungenKugelposition /schneidenden Fräser
winkel für rechtsNegativer Kontakt-0102 ocse © ,12/6 :.TB.MTP :resärfnhableguK

Guhring software

Negativer Kontaktwinkel für rechtsschneidenden Fräser

Kugelbahnfräser: PTM.BT.: 6/21, © esco 2010

Kugelbahn: Profiltyp „Elliptisch"… corresponding to the user specific requirements

The geometries of the interchangeable milling heads with PCBNISO inserts are individually designed according to the specificrequirements of the respective homokinetic joint. There are various,
perfectly co-ordinated inserts available dependent on application andmaterial.

The specially developed
software calculates the milling
cutter geometry based on thespecifications for the contourof the outer race.

Outer Race

The inner race is also perfectly
machined with Guhring PCBN
ball race milling cutters.

Inner Race

Simple and quick change of milling cutter head
The interface between base holder and milling head enables the simple and quick changeof the milling head when the inserts are worn. The user has two options doing this: either
to assemble the milling head from the rear through the base body or to assemble themilling head from the front, without the base body having to be removed from the machine.
ISO inserts in solid PCBN or with PCBN cutting edges ensure an economically efficientmachining operation. In the event of wear, the user only has to replace the milling head andreturn it to Guhring to be re-tipped with relatively cost-efficient standard inserts. The longlife base body can be further used.

Assembly of milling head from the front

Assembly of milling head from the rear

DRILLING

COUNTERSINKING/
DE-BURRINGMILLINGREAMINGMODULAR TOOLINGSYSTEMSTOOL RESTORATION SERVICE

Tel. +49 74 31 17-0
Fax +49 74 31 17-21279

info@guehring.de
www.guehring.de

PCD

146 971 / 1474-IX-06 • Printed in Germany • 2014

SPECIAL TOOLING
SOLUTIONSTAPPING/THREAD MILLING/
FLUTELESS TAPPING

Guhring KG
P.O. Box 100247 · 72423 Albstadt
Herderstrasse 50-54 · 72458 Albstadt