Rectangular Easy To Install Ball Screw Bracket

Introduction to Ball Screw Support EKEF

The ball screw support EKEF is a standardized precision transmission component, composed of an EK fixed end and an EF support end. It is mainly used to support and fix both ends of ball screws, trapezoidal screws, splines and other parts requiring rotational support. As a key component for high-precision positioning and stable transmission in modern automated equipment and precision machine tools, it suits medium-to-high precision and small-to-medium load scenarios, balancing easy installation and reliable performance.

Component Division and Core Functions

The EKEF adopts a classic "fixed end + support end" structure. These two parts work together to ensure transmission accuracy, compensate for deformation under working conditions, and meet general transmission requirements:

(1) EK Fixed End

Its core function is to limit the ball screw’s axial movement and provide rigid support to eliminate axial clearance. Equipped with preload-adjusted angular contact ball bearings internally, it adopts DF (face-to-face) or DFD configuration and is compatible with C1-C7 grade ball screws. It balances high rigidity and low torque, and can absorb parallelism installation errors between the screw and guide rail to enhance operational smoothness.

(2) EF Support End

As a floating end, it provides flexible rotational support for the screw. It compensates for axial expansion and contraction caused by temperature changes and load fluctuations, preventing jamming and precision loss. Fitted with deep groove ball bearings, it is suitable for scenarios with small axial forces. Combined with a dedicated sealing structure, it forms a complete support system with the EK fixed end and can also be paired with other fixed end models.

Core Product Features

(1) Both High Precision and High Rigidity

The EK fixed end uses JIS Class 5 or P0 grade angular contact ball bearings. Ultra-small models such as EK6 and EK8 are equipped with 45° contact angle miniature bearings to boost rigidity and rotational precision. The EF support end is matched with suitable deep groove ball bearings, and overall geometric tolerances are strictly controlled to ensure the equipment’s precise positioning and efficient transmission.

(2) Multi-specification Bearing Adaptation, Flexible Selection

Three bearing configurations are available to meet different scenarios and budgets: imported well-known brand bearings for high-end precision transmission; domestic famous brand preloaded bearings for balanced performance and cost-effectiveness (suitable for general precision needs); and Japanese or German deep groove ball bearings as an economical option for C7 grade ball screws. Selection can be flexibly made based on the ball screw grade and working conditions.

(3) Easy Installation and Strong Versatility

With a miniaturized design, it fits compact installation spaces. The EK series is fixed vertically to the screw axis with two screws, and the shoulder reserves ample passing space for easy layout of surrounding components. Its installation dimensions are compatible with international brands such as THK, NSK and Rexroth, facilitating replacement, maintenance and bulk procurement. Preload adjustment and grease filling are completed before delivery, allowing direct assembly without additional processing and greatly reducing installation time and difficulty.

(4) Reliable Sealing and Long Service Life

All models are equipped with dust-proof and waterproof oil seals, filled with high-quality lithium soap-based grease, and sealed with special gaskets. This effectively blocks dust, impurities and moisture, extending the bearing’s service life and reducing lubrication and maintenance frequency. It is suitable for long-term operation in complex industrial environments, lowering equipment maintenance costs and downtime losses.

(5) Foolproof Design, Adaptable to Special Needs

The bearing set adopts DF/DFD combined preload design. The preload state is hardly affected by the compression degree of the axial lock nut, avoiding excessive preload errors during installation. It supports customization of special specifications, including adjustments to shape, size and precision, to fit non-standard equipment and special transmission scenarios, balancing standardization and customization.

Specification Parameters and Selection Points

(1) Standard Specifications

It is compatible with ball screws with a shaft diameter of 6-32mm. Standard models include EK/EF06, 08, 10, 12, 15, 20, 25, etc. The EK series fits 6-25mm shaft diameters, and the EF series is used with corresponding EK models, covering most small and medium-sized precision transmission scenarios and meeting the size requirements of different equipment.

(2) Core Selection Points

1. Working Condition Matching: Select bearings based on the equipment’s load type (axial force, radial force) and operating speed. Prioritize imported high-precision bearings for heavy cutting and heavy load scenarios; domestic preloaded bearings or economical bearings are suitable for general small and medium load conditions;

2. Precision Adaptation: Choose the EK fixed end with the corresponding preload grade according to the ball screw’s precision grade (C1, C3, C5, C7) to ensure consistent transmission accuracy;

3. Installation Space: Select based on equipment layout. The EK series is suitable for scenarios with sufficient shoulder space and requiring two-screw fixation, forming complete support with the EF support end;

4. Replacement Compatibility: For upgrading existing equipment, select models according to the dimensions of the original brand’s support base to achieve seamless replacement by virtue of its internationally universal dimensions.

Application Scenarios

With the advantages of high precision, high reliability and easy installation, the EKEF support is widely used in automated and precision machinery fields, including CNC machine tools (core axes such as the X-axis), machining centers, industrial robots, electronic equipment, medical devices, as well as printing, textile and packaging machinery. It meets both high-precision positioning transmission and general rotational support needs, improving equipment stability and efficiency. It is also applicable to mechanical maintenance and equipment upgrading.

1. Installation and Maintenance Notes

2. Do not disassemble the support unit during installation; avoid damaging the oil seal flange when inserting the screw shaft;

3. Apply adhesive to hexagon socket fixing bolts when compressing gaskets to prevent loosening; take additional anti-loosening measures under severe working conditions;

4. After installation, use a micrometer to detect the screw shaft’s runout and axial clearance, then fully tighten all components after adjusting to smooth operation;

5. Regularly check sealing and lubrication, and supplement grease as needed;

6. Ensure coaxiality when connecting to the motor to avoid component wear or precision loss caused by installation deviation.