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FZH Bronze Steel-Ball Retainer Bushing Size, Recommend housing tolerance H7 and the shaft h8.

Specifications:

Material: Bronze + SUJ2 Steel Ball, FZH Bronze Steel-Ball Retainer Bushing products can be customized according to the size required by the customer or the drawings provided.

FZ Cages Bearing FZH (Bronze based)

Retainer Bushing

Steel-Ball Retainer Bush Series
Introduction
FZH, FZL and FZP ball retainer use bronze, aluminum, POM colophony as its base. They are machined some regular holes and
embedded the steel-ball into the new work-craft will prevent the ball getting out of as old. As the ball diameter is larger than
the retainer s thickness, so it will face to face directly with guide bush, this will bring high precision match. Now the ball retainer
series items are designed to rotate on the post, as well as maintain its vertical motion. We believe this will give you the benefit
of increasing accuracy.
Advantages and Applications
As the traditional work-craft has some grudge between bush with posts, the coefficient of friction is larger. Now we have changed the
work-ways to steel-ball directly face to face guide bush, so the precision is improved. It composes of both active roll and lowers friction
coefficient, now they have been widely used in the punching machine, die machine, a high precision machine which needs rotation and vertical
motion.

FZH (Bronze based) Bushing Bearing

FZH(copper base), FZL(aluminum base) and FZP(resin base) steel ball retaining rings are made of copper alloy, hard aluminum alloy and POM resin respectively, and the holes with orderly arrangement, appropriate size and special shape are processed on the outer round surface of the rings. Rolling bearing steel balls are inserted into the holes. Using the latest groove circumferential ball lock technology, effectively solve the traditional point ball lock and indentation ball can not completely prevent the ball falling off the problem. The bottom of the hole is processed with a 90° stop so that the steel ball can rotate freely in the hole without falling off. Due to the diameter of the ball more than keep the ring wall thickness, so when use remain higher than that of steel ball ring, cylindrical surface, direct contact with the match of the hole and shaft, the substrate (circle) floating in the middle, and match the difference between the hole and shaft radius less than the diameter of steel ball, steel ball and fits for interference fits, with high precision, flexible shaft and hole relative motion. It is the update product of keeping circle.

TZH linear bearing material:

FZH (copper)

FZL (aluminum)

FZP(resin base)

Application characteristics of TZH linear bearing:

The traditional hole with relative movement has a certain clearance between the shaft and the shaft, and the friction coefficient between the hole and the shaft is large. After using the steel ball retaining ring, the shaft and the hole do not contact directly, but contact with the steel ball with a trace interference fit in the middle, so the motion precision is high. Rolling friction instead of sliding friction, rolling flexibility, small friction coefficient, long service life. In both the rotating and moving, with no oil or gas in the axle housing and shaft are suitable, although can meet the requirements, but the movement precision is low, with rolling bearings, can only meet the relative rotation, and use the ball to keep, and can satisfy the above two conditions, the product has been widely used in cold stamping die frame, high precision machine tools, machine tool accessories, and high-precision axial Or simultaneous neck movement. Copper – based linear bearings, aluminum – based linear bearings and engineering plastic – based linear bearings can be selected for different use occasions.

Advantages and uses of TZH linear bearing

Traditional has the relative motion of the hole and the shaft is a certain gap, and movement between hole and shaft friction coefficient is bigger, use the ball to keep, and the shaft and hole does not directly contact, but through a trace of interference between steel ball, thus movement precision, rolling friction instead of sliding friction, rolling flexible, small friction coefficient, long service life, In both rotating and moving occasions, with oil-free or oiled bushing and shaft matching, although can be met, but the movement accuracy is low, with rolling bearings, can only meet the occasion of relative rotation of the shaft, while the steel ball retaining ring, the above two conditions are met. At present, it has been widely used in cold stamping die rolling die frame, high precision machine tool, machine tool accessories and high precision axial or axial diameter simultaneous movement occasions.

TZH linear bearing matching parts are recommended

1. Guide sleeve: Material GCrl5, YB9, heat treatment, hardness HRC62~66, technical conditions according to GB/T12446 and shaft should have 0.01~0.02 radial interference, surface roughness is #FormatImgID_0#

2. Shaft: Material GCrl5, YB9, heat treatment, hardness HRC62~66, technical conditions according to GB/T12446, shaft tolerance h5, surface roughness is #FormatImgID_1#

3. Measurement: use general measuring means (air meter, outer diameter dry scale, inner diameter micrometer, etc.) to measure the size deviation of the guide sleeve and the steel ball, and then calculate the interference after matching, Ymax= Dmax + 2D ‘-dmin, the interference is required to be 0.01~0.02mm.