BSHP Ball Runner Block SNS, standard, Resist NR II, without ball chain R2011 … 0.

Description

• Area of application: For restricted space in transverse direction
• Long-term lubrication is possible over several years
• All metal parts are made from corrosion-resistant steel
• Significantly reduced frictional oscillations and low friction level, particularly under external load
• Patented entry zone increases the travel accuracy up to a factor of six

Features

• Can be used on all SNS Ball Guide Rails
• Available in five common sizes
• Lube fittings with metal threads on all sides
• The same high load ratings in all four main directions of loading
• Attachments on the Ball Runner Block can be mounted from above
• Minimum quantity lubrication system with integrated reservoir for oil lubrication
• Optimized entry-zone geometry and high number of balls minimize variation in elastic deflection
• Excellent dynamic characteristics
• Integrated all-around sealing

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.

Characteristic features

Ball Rail Systems Resist NR II made from corrosion-resistant steel1) used specifically in conjunction with water-based media, heavily diluted acidic materials, alkali or saline solutions. These guides are also ideally suitable for use at relative humidities above 70 % and temperatures exceeding 30 °C. Such conditions are found mainly in cleaning plants, electroplating and pickling lines, vapor degreasing plants and refrigeration systems. Since no additional corrosion protection is required, Ball Rail Systems Resist NR II are ideally suited for use in clean rooms and general printed circuit board manufacturing. They are also suitable for other applications in the general packaging industry.

1) Resist NR II: Ball Runner Block body and Ball Guide Rail as well as all steel parts made of corrosion-resistant steel in accordance with DIN EN 10088

Technical data

Load capacities and load moments

Size			15	20	25	30	35
C	N		5100	12300	15000	20800	27600
C0	N		9300	16900	21000	28700	37500
Mt	Nm		63	205	270	460	760
Mt0	Nm		90	215	295	500	805
ML	Nm		34	110	150	245	375
ML0	Nm		49	115	165	265	390

General technical data

Legend

General Notes

The general technical data and calculations apply to all Ball Rail Systems i.e. to all Ball Runner Blocks and Ball Guide Rails. Specific technical data relating to the individual Ball Runner Blocks and Ball Guide Rails is listed separately.

Preload classes

To cover the widest possible range of applications, Rexroth Ball Runner Blocks are available in different preload classes.

The following preload classes are available:

• Ball Runner Block without preload (preload class C0)

• Ball Runner Blocks with moderate preload (preload class C1)

• Ball Runner Blocks with average preload (preload class C2)

• Ball Runner Blocks with high preload (preload class C3)

To prevent reductions to the service life, the preload should not exceed 1/3 of the load on bearing F.

In general, the rigidity of the Ball Runner Block rises with increasing preload. If vibrations occur, select a correspondingly high preload (≥ preload class C2).

Guide systems with parallel rails

When choosing the preload class, pay attention to permissible parallelism offset of rails too ("Accuracy class selection criterion").

When specifying ball rail systems of accuracy class N, we recommend preload class C0 or C1 to avoid distortive stress due to the tolerances.

Dimensions

Dimensions

Project planning information

Mounting

Maintenance

Information

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