What does a ball bush on a linear shaft give?

Frictionless motion of the linear shaft.

Let's make an axial groove on the shaft, which groove corresponds to the radius of bush balls. Now we got a frictionless linear movement, combined with two important characteristics:
 

•      rotary torque-free transmission and

•      higher load capacity.

This is a ball spline.
A linear bush (ball spile nut), that could have greater load capacity, and a shaft, which is rotatable, contrary to a rail profile.

A perfect system for both fast movement and quick rotation.

If you want to read more about the ball spline, as

• the factors that affect the proper functioning,
• the grooves and the balls how influence the traffic load and tolerance,
• the difference between the installation variations,
• and much more information

check out the following document!

Read our general operating instructions before using our products!

The Fiber Sheet

The Fiber Sheet for the SGL, GL, and SGW types, significantly extends lubricant replenishment intervals and ricant. has an excellent durability even under harsh conditions with dust and debris that absorb lubricant. Embedded in a block body, as shown in Figure A- 31, it does not change the length of the block.  In addition, the Fiber without a design change. Sheet does not require any change in mounting dimensions, which allows replacement with existing products

Simplified Lubrication Management

NB's Fiber Sheet is a fiber material with a porous structure containing the lubricant oil. The oil is supplied to the ball elements at the proper time and with the proper amount by the principle of capillarity, greatly increasing the relubrication period. 

Outstanding Durability Even Under Poor Operating Conditions

An acceleration test was performed with oil absorbing material sprayed on the units to validate the GL type's lubrication performance and durability even under poor operating conditions. 

The objective of lubrication includes the reduction of friction among the rolling elements as well as between the rolling elements and the raceway, prevention of sintering, reduction of wear, and the prevention of rust by forming a film over the surfaces. To maximize the performance of a linear system, the lubricant type and a lubrication method appropriate for the operating environment should be selected.

There are two types of lubrication; oil lubrication and grease lubrication. For oil lubrication, turbine oil conforming to ISO standard VG32 to 68 is recommended.

For grease lubrication, lithium soap based grease No. 2 is recommended. For slide bush and some other products, anti-rust oil that does not adversely affect the lubricant is applied prior to shipment. Please apply lubricant before using these products. (see Table 1- 37) Products with raceway grooves, such as slide guide, are delivered pre-lubricated with grease for immediate use. Please relubricate with a similar type of grease periodically depending on the operating conditions. The recommended relubrication period is about 6 months or 1,000km of travel distance under normal conditions.

NB provides the following optional greases. Please select one in accordance with the use

conditions of your linear system.

●KGL Grease (Low Dust Generation Grease) 

KGL Grease has an excellent property of low dust generation with a lithium-type thickening agent used. It

is ideal for use in a clean room.

●KGU Grease (Low Dust Generation Grease)

 * grease pre-applied on FR•FRA type

With urea-type thickening agent used, KGU Grease has features including a superior low dust generation

property and the reduced dynamic frictional resistance during low-speed operation.