BSHP Ball Runner Block FNS, standard, steel, without ball chain R1651 … 2.

Description

• Area of application: For high rigidity requirements
• Excellent dynamic characteristics
• Significantly reduced frictional oscillations and low friction level, particularly under external load
• Maximum precision
• Patented entry zone increases the travel accuracy up to a factor of six

Features

• Attachments on the Ball Runner Block can be mounted from above and below
• Lube fittings with metal threads on all sides
• End-face fastening thread for all attachments
• Integrated all-around sealing
• High torque capacity
• Different preload classes
• High rigidity in all load directions – permits applications with just one runner block per rail
• Improved rigidity under lift-off and side loading conditions due to two additional mounting screw holes at the center of the Ball Runner Block
• Maximum system rigidity due to pre-tensioned O-arrangement
• Optional integrated, inductive and wear-free measuring system
• Ball Runner Block pre-lubricated at the factory.
• Can be used on all SNS/SNO Ball Guide Rails
• Long-term lubrication is possible over several years
• The same high load ratings in all four main directions of loading

Product description

Friction

Due to the Rexroth design with four rows of balls, 2-point contact is available in all loading directions. This reduces the friction to a minimum.

Other ball rail systems with two or four rows of balls with 4-point contact have multiple friction: due to the differential slip with lateral loading and in case of comparable prestressing without the load, the gothic raceway profile causes higher friction (depending on the raceway curvature and the load, up to five times the friction coefficient). This high friction leads correspondingly to greater heat.

Seals

Seals are use to prevent dirt, chips and coolants, etc. from working their way into the inside of he Ball Runner Block, thereby preventing reductions to its service life. For further information, see "Selection criteria/seals".

Standard seal (SS)

Universal seals are fitted as standard in Rexroth Ball Runner Blocks. They have a uniform sealing effect for Ball Guide Rails with and without cover strips. Low friction and a good sealing effect have both been taken into account in the design. For applications where effective sealing is required.

Low-friction seal (LS)

For special requirements with regard to ease of movement.

Double-lip seal (DS)

For increased exposure to media

Front seal

For applications in environments with fine dirt or metal particles, as well as coolants or cutting fluids.

Interchangeable during servicing.

Front seals are available as accessories for mounting by the customer.

FKM seal

For applications in extreme environments with fine dirt or metal particles, as well as heavy use of coolants or cutting fluids.

Interchangeable during servicing.

FKM front seals are available as accessories for mounting by the customer.

Cover plate wiper

For use in environments with coarse dirt or chips.

Cover plate wiper are available as accessories for mounting by the customer.

Technical data

Diagrams/characteristic curves

Rigidity of ball rail system with preloading

Due to the large number of variants only one type is listed. Further rigidity diagrams are available on request.

Example

Ball runner blocks FNS

Flanged, normal, standard height

Size 35:

a) Ball runner block R1651 31. 20 for preload C1

Resist NR: Ball runner block R2001 313 30 for preload C1

b) Ball runner block R1651 32. 20 for preload C2

c) Ball runner block R1651 33. 20 for preload C3

Preload

C1/C2/C3 = in accordance with table for preload force Fpr

Resist NR material numbers for the corresponding preload only

Key

δel Elastic deformation (μm)

F = Load (N)

Dimensions

Project planning information

Mounting

Maintenance

Certification

Safety Instructions

Downloads

	Profiled rail systems Manual | R320103885_EN | 2016-09-01 | English | PDF | 11.5MB Product Groups: Linear guides
	Catalog BSHP Ball Rail Systems Catalog | R999000485 | 2020-10-01 | English | PDF | 15MB Product Groups: Ball Rail Systems only available as PDF