The six categories of THK of LM Guide seals for the market (Part 1)

October 25, 2018

1. Standard THK Seal & Metal Scraper

  • The end seal on the LM Guide is used in locations that are exposed to dust particles. 

The side seal is used in locations on the LM block which are prone to dust entering from surfaces such as the side or bottom. These include vertical, horizontal and inverted mounts.  

The inner seal can be located in areas that are severely exposed to dust or cutting chips. 

The double seals can be located in areas exposed to significant amounts of dust or cutting chips. 

The non-contact metal scraper is used in locations where welding spatter may adhere to the LM Rail. 

The Common Seal Types: 

UU - With end seal 

SS - With end seal + side seal + inner seal 

DD - With double seals + side seal + inner seal 

ZZ - With end seal + side seal + inner seal + metal scraper 

KK - With double seals + side seal + inner seal + metal scraper 

2. Made to order Laminated Contact Scraper (LaCS) 

LaCS are made to order for locations with adverse environments. The LaCS is non-standard stock item from THK for selected LM Guide models. The LaCS is designed to remove minute foreign materials, found on the LM rail, in various stages and prevents it from entering the LM block with laminated contact structure. 

This is due to the fact that the three layers of scrapers have full contact with the LM rail. It also creates low friction due to its oil-impregnated, foam synthetic rubber, which is self-lubricating. 

The Common Seal Types:

SSHH - With end seal + side seal + inner seal + LaCS 

DDHH - With double seals + side seal + inner seal + LaCS 

ZZHH - With end seal + side seal + inner seal + metal scraper + LaCS 

KKHH - With double seals + side seal + inner seal + metal scraper + LaCS 

JJHH - With end seal + side seal + inner seal + LaCS + protector (serving also as metal scraper) 

TTHH - With double seals + side seal + inner seal + LaCS + protector (serving also as metal scraper) 

3. Made to order QZ Lubricator 

QZ Lubricator supplies the required amount of lubricant to the LM rail raceway. An oil film is continuously formed between the rolling element and raceway, extending the lubrication and maintenance intervals significantly. 

Three major elements make up the QZ lubricator structure: 

A heavy oil-impregnated fiber net, which stores lubricant.A high-density fiber net, which applies lubricant to the raceway.An oil-control plate, which adjusts the oil flow.

The lubricant contained in QZ Lubricator is fed by the capillary phenomenon as the fundamental principle. The lubrication maintenance interval can be significantly extended, as it supplements an oil loss. The QZ lubricator is an eco-friendly lubrication system that does not contaminate the surrounding area, as it feeds the required amount of lubricant to the ball raceway. 

The Common Seal Types: 

QZUU - With end seal + QZ 

QZSS - With end seal + side seal + inner seal + QZ 

QZDD - With double seals + side seal + inner seal + QZ 

QZZZ - With end seal + side seal + inner seal + metal scraper + QZ 

QZGG - With LiCS + QZ 

QZPP - With LiCS + side seal + inner seal + QZ 

QZSSHH - With end seal + side seal + inner seal + LaCS + QZ 

QZDDHH - With double seals + side seal + inner seal + LaCS + QZ 

QZZZHH - With end seal + side seal + inner seal + metal scraper + LaCS + QZ 

QZKKHH - With double seals + side seal + inner seal + metal scraper + LaCS + QZ 

QZJJHH - With end seal + side seal + inner seal + LaCS + QZ + protector (serving also as metal scraper) 

QZTTHH - With double seals + side seal + inner seal + LaCS + QZ + protector (serving also as metal scraper)