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Guide Ball Bush LG

Guide Ball Bush LG

Guide Ball Bush LG

Product catalog summary
Guide Ball Bushing Overview
The Guide Ball Bushing (model LG) offers a compact system with a load rating more than twice that of the Linear Bushing model LM, while maintaining the same dimensions. It features a 4-groove structure that eliminates the need for a rotation stopper, allowing for various combinations of nut and shaft.

Specifications and Features
  • Higher Load Rating: The circular arc grooves ensure a load rating more than twice that of the Linear Bushing model LM.
  • No Rotation Stopper Needed: The 4-groove structure negates the need for a rotation stopper, facilitating a more compact design.
  • Interchangeability: The outer tube dimensions match those of the Linear Bushing model LM, allowing for easy replacement.
  • Model Variants: Model LG-S is dimensionally interchangeable with model LM, while model LG-L offers increased load capacity with a longer nut.

Mounting and Handling
  • Model LG can be mounted using pin holes, snap rings, or stopper plates.
  • Precautions should be taken against eccentric loads, which may require using models with higher load capacities like Ball Spline model LBS or LT.

Performance Advantages
  • Replacing Linear Bushing with Guide Ball Bushing can extend service life by over 13.8 times and reduce machine size.
  • Comparison tables show significant improvements in load capacity and permissible moments.

Accuracy and Dimensions
  • Radial clearance and run-out specifications are provided, ensuring precise alignment and performance.
  • Detailed dimensional tables for various LG models are included, specifying shaft diameter, nut dimensions, and load ratings.

Usage Precautions
  • Proper assembly and handling are crucial to avoid damage and ensure functionality.
  • Lubrication guidelines emphasize the importance of using appropriate lubricants and maintaining regular intervals.
  • Environmental considerations include avoiding high temperatures and preventing foreign material ingress.

Contact Information
THK provides global contact details for various offices, ensuring support and service availability worldwide.
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Catalog excerpts

Guide Ball Bush LG-1

Guide Ball Bushing Contributes to compact the system Achieves load rating more than twice the Linear Bushing with the same dimensions (model LG-S) Various combinations of nut and shaft are available A rotation stopper is unnecessary due to 4-groove structure TOKYO. JAPAN

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Guide Ball Bush LG-2

Since model LG has 4 rows of circular arc grooves (raceways), it does not need a mechanism to prevent the outer tube from rotating. In addition, its load rating is much larger than Linear Bushing model LM with the same dimensions. Therefore, replacing the Linear Bushing with the Guide Ball Bushing will reduce the size and cost of the guide unit and extend the service life. # Higher load rating than the Linear Bushing Since model LG ensures an R contact through the use of circular arc grooves for ball contact, it achieves a load rating more than twice that of point-contact Linear Bushing model...

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Guide Ball Bush LG-3

M Od 61 LG~3 'n tn's tvPe' tne diameter and the length of the LG nut are the same as that of Linear Bushing model LM. This type is dimensionally interchangeable with model LM. M Od61 LG~L Model LG-L is a long type in which the overall length of the LG nut is longer than that of model LG-S to increase the load carrying

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Guide Ball Bush LG-4

To mount model LG, use a pin hole machined on the LG nut. As with the conventional Linear Bushing, model LG can be mounted using snap rings and/ •Mounting model LG using a pin •Mounting model LG as with the conventional Linear Bushing Snap rings Stopper plates Q Precautions To Be Taken if an Eccentric Load Is Applied Model LG achieves a much higher load-carrying capacity in receiving the eccentric load (moment and torque) than Linear Bushing model LM because of 4 rows of raceways. However, under conditions where the eccentric load is larger, the product may result in poor operation or early failure....

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Guide Ball Bush LG-5

Examples of Changing the Linear Bushing to the Guide Ball Bushing Advantage of using the Guide Ball Bushing 1 : Longer service life Since model LG has a rated load more than 2.4 times the Linear Bushing with the same dimensions, replacing the Linear Bushing with model LG will increase the service life by more than 13.8 times. Comparison of the service life between Guide Ball Bushing mode LG and Linear Bushing model LM Advantage of using the Guide Ball Bushing 2: Smaller machine size Since the Linear Bushing is not suitable for applications where a load in the rotational direction is applied,...

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Guide Ball Bush LG-6

Accuracy Standard Support section/ \Support section Run-out of the outer diameter of the nut relative to the support section of the shaft : The value if the radial clearance is zero (^Radial Clearance Radial Clearance Radial Clearance Normal clearance Measurement of radial clearance

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Guide Ball Bush LG-7

Dimensional Table of Model LG *1: Value when a row of balls under a load are directly *2: Reference value when the radial clearnace is at a *3: Reference value when the radial clearnace is at a maximum (+10 urn) with a row of balls under a load being directly beneath the load. Example of model number coding Overall length of the LG shaft Model number of the LG shaft Model number Overall length of the LG shaft ■ Number of LG nuts installed In principle, we support estimates and orders by the LG shaft (1 ) or the LG nut (2). We also support a set consisting of LG shaft and LG nut (3) at your request....

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Guide Ball Bush LG-8

TfiHlK Guide Ball Bushing LG Assembling the LG nut with the LG shaft • When assembling the LG nut with the LG shaft, match the positions of balls inside the LG nut with the grooves on the LG shaft, and then insert the LG shaft into the LG nut straight and gradually. If the LG shaft is not inserted straight, balls may fall out or the circulating part may be damaged. • If the LG shaft sticks while you are inserting it, do not force it into the nut, but pull it out first, re-check the positions of the balls with the positions of the LG shaft grooves, and then re-insert the shaft straight and gradually....

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*Prices are pre-tax. They exclude delivery charges and customs duties and do not include additional charges for installation or activation options. Prices are indicative only and may vary by country, with changes to the cost of raw materials and exchange rates.