MarMotion high-precision rotary stroke bearings. Fo r e ve r y i n d u s t r y. I t h a s i t s o r i g i n s i n t o o l b u i l d i n g a n d i s a t h o m e i n m e c h a n i c a l e n g i n e e r i n g . We w o r k c l os e l y w i t h o u r c u s t o m e r s t o d e ve l o p e ve r n e w s o l u t i o n s t h a t a re a p p l i c a t i o n a n d p ro c es s fo c u s s e d a n d c a n b e u s e d i n a l l i n d u s t r i es . Th e p re c i s i o n b e a r i n g fo r ro t a r y a n d s t ro k e m o ve m e n t s m a k es m e t ro l o g y m o re e x a c t , m e d i c a l e n g i n e e r i n...

MACHINE BUILDING

MarMotion. Application examples OPTIMIZED MOVEMENT High-precision rotary stroke bearings are design elements. They can be calculated, are standardized to a certain degree and can be exchanged without loss of quality. This applies for both standard and customized versions. High-precision rotary stroke bearings can be used in all industries wherever stroke or rotary movements – even both simultaneously – need to be performed. Here are a number of examples: Metrology Mahr is acknowledged as one of the market leaders in the field of industrial metrology. What perhaps is less well known, however,...

Mechanical engineering Medical technology picture: Wendt picture: Schick The high-precision rotary stroke bearing is most popular in mechanical engineering applications. It is used for die-cutting and molds in tool building applications and in machine tools where it is used, for example, for center sleeve bearings. It is an indispensable component for packaging machines in a wide range of industries, in automatic assembly units, textile machines and high-quality special-purpose machines. These bearings exhibit high rigidity, excellent load-bearing capacity and absence of stick slip. Medical equipment...

MARMOTION. HIGH-PRECISION ROTARY STROKE BEARINGS

N421 with internal thread on press-in side N423 with internal thread on guide side N425 with internal thread on both sides Ball Cages N511 Brass with Circlip 14 Guide Bushes N552 closed with Stop Rings 18 N553 closed with Sealing Rings 20 N570 closed with Wiper Seals 22 Ball Cages Mini Range Guide Bushes Mini Range N552 closed with Stop Rings 28 Technical Description

Guide Shaft Types N 400 Guide shaft to DIN 9825 N 421 Guide shaft with internal thread on press-in side N 423 Guide shaft with internal thread on guide side N 425 Guide shaft with internal thread on both sides Suitability Hardened guide shaft with precision ground surface. • Suitable for high-precision rotary stroke bearings. • When used with MarMotion guide bushes and ball cages, preloading is ensured. • Guide diameter dw is precision ground and lapped to ISO h3, Rz <1 μm. • Roundness within 1/3 ISO-IT3. • Straightness within 5 μm/100 mm. • Ends are either rounded or have lead-in taper. • See...

Guide Shaft

Plastic Ball Cage N 500 Suitability Cage made of polyacetal resin with steel balls. • High acceleration is possible due to the light composition of the plastic material. • Excellent dry running characteristics. • Smoothest possible run. Features • Injection-molded. • The balls are captive but can move easily. • Balls which are staggered in the axial direction extend the service life of the rotary stroke bearing. • The cages which are provided with mating pins and slots can be used for combining individual sections to form any desired length. • See page 37-41 for instructions on installation and...

Plastic Ball Cage

Brass Ball Cage N 501 Suitability Brass ball cage with steel balls in a helical arrangement. • Allows universal use. • Provides an optimum combination of smooth running and long service life. • The helical arrangement of the balls is ideal for linear and rotary movements. Features • The ball chambers are mechanically caulked so that the balls remain captive but still move easily. • The balls are arranged in an optimum formation so that each ball can run on its own track for both linear and rotary movements. • The ball formation ensures smooth running and substantially lengthens the service life...

Brass Ball Cage

Brass Ball Cage with Circlip N 511 Suitability Brass ball cage with steel balls and circlip for path limitation. • Provides an optimum combination of smooth running and long service life. • High loading capacity due to large number of balls. • Particularly suitable for linear movements in tools and machines which require high precision. • Reliable ball cage path limitation using circlip. Features • The ball chambers are mechanically caulked so that the balls remain captive but still move easily. • Large number of balls ensures high loading capacity. • Brass offers high mechanical stability, optimum...

Brass Ball Cage with Circlip

Open Guide Bush N 550 Suitability Open guide bush with tapered inside edges on both sides. • Allows universal use. • When used in combination with shaft diameter dw ISO-h3, preloading of the rotary stroke bearing is guaranteed. • The ball cage can project out of the guide bush on both sides. This permits long stroke paths even with short guide bushes used in combination with long ball cages (note minimum contact length). Features • Guide bore diameter d1 is finely honed to ISO tolerance IT 3, Rz 0.5 – 1.5 μm depending on diameter. • Roundness within 1/3 ISO-IT 3. • Cylindricity within IT 1. •...

Open Guide Bush

Closed Guide Bush with Stop Rings N 552 Suitability Design as for N 550, with stop rings fixed on both sides. • When used in combination with shaft diameter dw ISO-h3, preloading of the rotary stroke bearings is guaranteed. • The stop rings ensure the cage is effectively restricted for linear and rotary movements. • Smooth running of the rotary stroke bearing is not impaired by the stop rings. Features • Stop rings fixed on both sides. • The closed guide bush and integrated ball cage form a separate component. • Guide bore diameter d1 is finely honed to ISO tolerance IT 3, Rz 0.5 – 1.5 μm depending...