Product Pages
Honing

Superfinishing
Centreless Through-Feed
Machines for Cylindrical
Components
Centreless Through-Feed
Machines for Tapered
Components
Centreless Through-Feed
Machine with Automatic Response to Lift and
Lower the Stones at the
Interruptions
Centreless Plunge-Cut
Machine for Cylindrical
Components
Centreless Plunge-Cut
Machine for Taper Rollers
Further Superfinishing
Machine Series

Tape Finishing Machines
Deep Hole Drilling Machines
Assembly & Leak Testing Machines
Leak Testing Machines
Services

Click to enlarge

Superfinishing

PERMAT supplies superfishing machines, superfinishing attachments and superfinishing stones.

Click on the image opposite to see an enlarged view.

Stock Removal
Stock removal is approx 5-8 µm
in Ø
Guide Value: Stock removal in
Ø = 3 to 4.Rz
resp. 15 TO 20.Ra

Results
Improvement in Roundness
Approx. 50-80% with polygons;
R-r = 0.2 µm achievable
Advantage: Reduction of noise with anti-friction bearings and sliding bearings High Surface Finish Rz = 0.15-0.25 µm; Ra = 0.015-0.02 µm
Advantage: High percentage contact area tpi 0.1 - 80-90% results in a
high load capability and reduction
of wear.

Adapted Stock Removal
at low temperatures and low pressures.

What is Superfinishing?
Superfinishing is used when grinding alone is not sufficient, or is too expensive, to achieve a required roundness and surface finish.

The required finish is achieved by pressing a fine-grained superfinishing stone against the revolving component. At the same time, it is brought back parallel to the machining surface for oscillation, while it moves in short longitudinal strokes.

The oscillation movement is produced electro-mechanically or by compressed air (contact pressure is normally made by compressed air). Hardness and grain of the superfinishing stones are selected to suit the job requirement.

Applications
Examples of use include for highly loaded bearing surfaces and sliding surfaces, anti-friction bearing elements and friction bearing shafts, contact areas of sealing rings and collars.

SCD 80 / SCD 200
click to enlarge

Features (SCD80 / SCD 200):
Pneumatic oscillation system
with 2400-2800 double strokes/min
Additional stroke = superimposed oscillation with 30-60 double strokes/min
Pneumatic stone contact
pressure
Hyperbolic feed rollers - position reversible
Device to adjust angle of
inclination
Roller drive: Pole change motor - infinitely variable friction cone gear
Split bearing arrangement for
roller type* allows rapid roller
change
Height adjustment of the
oscillation head by means of push-button with gear motor and friction clutch
Rapid adjustment of the roller distance against adjustable stops.

Centreless Through-Feed Machines for Cylindrical Components

The range available includes:

Through-Feed Machine SCD 80
Range of Application:
1.5-80 mm dia.
below 1.5 mm dia. (Upon request)
Beyond 80 mm dia. (Upon request)
Stone Guides:
7 with standard design
8 with special design

Through-Feed Machine SCD 200
Range of Application:
1.5-200 mm Ø
Stone guides: max. 10

Features: See SCD 80

Feed Roller for Cylindrical and Crowned Machining
Example: Machining of the cylindrical centre portion and the crowned ends of cylinder rollers in one continuous operation. Depending on the requirement up to 10 Stone guides.
Back

SCD 200-KE 35
click to enlarge

Features:
Basic machine SCD 200 or
SCD 80
Special equipment for taper
rollers:
Either: Interlinkage For interlinking with the Grinding Machine
Or: Feeding and Orientation device (see picture above)

Centreless Through-Feed Machines for Tapered Components

Through-Feed Machines for Taper Rollers
Range of Application:

SCD 200 AS
click to enlarge

Typical application:
Shock absorbers

Features:
Basic Machine SCD 200
Special equipment:
Automatic stone response
Component feed and removal

Centreless Through-Feed Machine with Automatic Response to Lift and Lower the Stones at the Interruptions

Through-Feed Machine SCD 200 AS
Range of Application:
7-30 mm dia.; max. 600mm length
(Differing dimensions upon request)
Stone Guides: max. 10 off

Recessed parts are machined by the through-feed process if the diameter of the recess is smaller than the machining diameter. Short recesses can be spanned by long stones. If the total length of the recess is more than 50mm, and in cases where the tolerance of the diameter is larger (more than approx. 10 µm), automatic response to lift and lower the stones is necessary.

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Left 6 SCE 80; Right SCE 25, click to enlarge
     
Features (6 SCE 80):
Use of SCD 80 units
Pneumatic oscillation system with 2400-2800 double strokes/min or mechanical oscillation system with 1450 double strokes/min when working close to shoulders 1.5mm
Additional stroke = superimposed oscillation with 30-60 double strokes/min
Pneumatic stone contact pressure

Features (SCE 25):
Oscillation system
Either: pneumatic Superfinishing Attachment SG 50 2300-2800 or 2800-3200 double strokes/min with undercut widths >1.5mm
or: electro-mechanical oscillation system with 1450 double
strokes/min for small shoulder distance or undercut widths
1.0mm >
Pneumatic stone contact
pressure
Roller bearing arrangement:
Flying or with counter bearing
Roller drive:Pole change gear
motor
Supporting unit for projecting
parts
Axial depth stop
Exchangeable rollers: Since the roller distance is not adjustable, 9 roller pairs Are required for the diameter range 3-25mm

Centreless Plunge-Cut Machine for Cylindrical Components

Plunge-Cut Machine 6 SCE 80
Range of Application:
5-50mm dia.
Machining length max. 75mm

No. of Stations:
Max. 6
(depending on component length)

Principle: As a rule, machining is done with only one stone in the following manner:
Rough machining at approx. 15-25 m/min
Finish machining at approx. 45-150 m/min

Plunge-Cut Machine SCE 25
Range of Application:
3-25mm dia. Or 10-30 mm dia.
Machining length max. 60 mm
No. of Stations: 1

Back

6 SCE 80 KE
click to enlarge

Features:
Use of SCD 80 units
Pneumatic oscillation system with 2400-2800 double strokes/min
Additional stroke = superimposed oscillation with 30-60 double strokes/min
Pneumatic stone contact pressure
Roller drive; Pole change motor,
with cycle times under 12 sec. D.C. drive
Principle: Rough machining at
Approx. 15-25 m/min
Finish machining at approx. 45-150 m/min

Centreless Plunge-Cut Machine for Taper Rollers

Plunge-Cut Machine 6 SCE 80 KE
Range of Application:
Taper rollers
D = 5-40 mm; dmin = 4 mm
Lmax. = 75 mm; @max. = 10

No. of Stations: Max. 6, depending on the length of the taper rollers

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Permat Machines Limited
Station Road, Coleshill, Birmingham
England B46 1JG
Tel: +44 01675 463351   Fax: 01675 465816
Telex: 336040

Nagel Maschinen-und
Werkzeugfabric GmbH
P.O. Box 1709 D-7440 Nurtingen
Tel: 07022 605-0   Telex: 7267337

Further Superfinishing Machine Series

STM
Centerless Plunge-Cut Machines With "circular arc shaped" oscillation movement for Generating lines of spherical rollers Number of stations: either 2 or 4

SE and SEL
Machines for machining between centres or in the Chuck
Type SE for plunge-cut machining
Type SEL for plunge-cut and longitudinal machining

SG
Superfinishing Attachments e.g. for Lathes
SG 50 pneumatic, with 1 stone guide
SG 75 pneumatic, with 2 or 3 stone guides
SGM 10 electro-mechanical, with 1 stone guide
SGM 100 electro-mechanical, with 4 or 6 stone Guides
SGMK 2500 transportable Calender Superfinishing Unit for machining of rollers in the calender Column

SPH and SPV
Finishing Machines with "rotating" honing sleeves for Machining of thrust faces and spherical faces
Type SPH, horizontal design*
Type SPV, vertical design*
*In single- and multi-spindle design

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