Frequently Asked Questions (FAQs) of Linear Guides

Linear guides are a versatile and most often crucial component for a variety of applications in the medical, automotive, warehouse automation, and other industries. Naturally, we receive many questions on them so we’ve put them all together in 1 blog post for easy reference. Read on to get your questions answered!

Are the block’s ball bearings retained?
Yes, all ball bearings are retained on MISUMI linear guides. For THK linear guides, part numbers starting with SHS/SSR/SRS/SHW are retained.

What is the seal material of MISUMI miniature linear guides?
Nitrile Rubber (NBR).

What is the W1 tolerance for MISUMI linear guides?
This tolerance is ±0.005 mm.

What is the width dimension tolerance of MISUMI blocks and rails?
Dimension tolerance of block width (W) is ±0.05mm, and that of rail width is ±0.005mm.

Can blocks be added or changed?
Blocks can be added or replaced only with Interchangeable Linear Guides. By doing this, precision standard of interchangeable linear guides remains the same. This is why interchangeable guides are sold as a set with option to purchase rails and blocks separately. All other types of linear guides are sold as a set only, and precision standard is only guaranteed for original/purchased set.

We also offer THK blocks separately which you can explore here.

Can the clips attached to the rail when shipped, be used as a stopper for a block?
No, clips are used to prevent blocks from falling off during shipping and storage and are not be used as stoppers.

If you need stoppers for your rails, MISUMI carries a variety of styles including stopper bolts, stopper plates, and linear stoppers. You can view the selection of stoppers and accessories here.

Is it possible to use your linear guides on the wall or ceiling?
Yes, MISUMI, THK, Bosch Rexroth, Thomson, Schneeberger and most of other linear guides have the same load rating at any mounting position because they have the ball line structure which can support the same load in any orientation.  Please check load moments when you use linear guides on the wall or ceiling.

What other brands of linear guides does MISUMI carry?
MISUMI now carries THK, Bosch Rexroth, IKO, Thomson, and Schneeberger in a variety of sizes.

What grease do you use as a standard?
For the miniature type, we use Multemp Grease PS2 from KYODO YUSHI CO., LTD.
For medium and heavy load type, we use Shell Alvania Grease No.2 from Showa Shell Sekiyu K.K.

Grease for THK linear guides listed below:
SRS (size 5-15) and SHW (size 12-17): AFF
SHS SSR HSR SR (size 15-65), SHW (size 21-50), HRW (size 17-50) and SRS (size 20-25): AFB-LF

Is the calculation of life span difficult?
No, it’s easy! By using operating conditions such as load or speed you can calculate the life span of the product. For more details see “Calculation of Life Span of Linear Systems” in the Technical Data catalog section here.

Is it possible to get my linear guide cut-to-length?
Yes, our new rail-cutting service allows for rail length increments of 1 mm of THK and Bosch Rexroth linear guides with a 2 day lead time. Visit our dedicated page here. MISUMI linear guides are also configurable in 1 mm increments.  For the other brands, please check our website to see lead times.

If you have a question on linear guides, feel free to comment below and our experts will get back to you.

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