In precision machine tools, industrial robots, semiconductor equipment, and automated production lines, the accuracy of linear motion often determines the quality of the final product. Whether it is the tool feed of CNC machine tools, the Z-axis lifting of robots, or the precise positioning of placement equipment, every linear motion is supported by a set of leadscrew support bearings silently carrying and transmitting loads.

 

NMT Leadscrew Support Bearings, with high rigidity, low friction, and long life as core characteristics, provide solid reliable support for precision linear transmission. Angular contact ball bearings, deep groove ball bearings, and thrust angular contact ball bearings work together to form a comprehensive leadscrew support bearing fitting system, adapting to various machine tool feed axes, robot linear modules, semiconductor equipment precision platforms, automated assembly units, and other applications.

 

High rigidity is the primary requirement for NMT leadscrew support bearings. The rigidity of leadscrew bearings directly determines the machining accuracy and vibration resistance of machine tools. Through precise contact angle design (15°, 25°, 40° available) and optimised internal load distribution, NMT enables bearings to simultaneously withstand radial and axial combined loads. Contact angle accuracy is compressed to an extremely small tolerance range, ensuring bearings provide precise preload and rigid support after installation. Multi-bearing pairing configurations (back-to-back, face-to-face, tandem) further enhance the overall rigidity of the bearing group, minimising deformation of the leadscrew system under cutting forces and loads.

 

Low friction is the core value of NMT leadscrew support bearings. Starting from the continuity of mechanical transmission, NMT's leadscrew bearings create a harmonious coordination between contact angle design and the lead and preload grade of the screw. In manufacturing precision, raceway roundness and waviness are synergistically controlled within extremely small tolerance windows. Combined with low-vibration, low-friction cage designs, bearings produce virtually no discernible noise or temperature rise at high speeds. For applications highly sensitive to environmental conditions, such as medical rehabilitation robots or semiconductor inspection equipment, this quiet and thermally stable operating characteristic is itself an indispensable quality assurance, reducing the need for frequent calibration caused by thermal drift.

 

Long life and preload retention are the unique advantages of NMT leadscrew support bearings. Many engineers encounter the same confusion: new equipment has perfect accuracy, but after six months of operation, the forward and reverse clearance of the screw begins to increase, and repeat positioning accuracy gradually degrades. The root cause often lies not in the screw itself, but in the irreversible attenuation of the support bearing preload. NMT's approach addresses this from both material and geometric dimensions simultaneously. Bearing steel undergoes special dimensional stabilisation heat treatment to resist micro-deformation caused by crystal structure changes during long-term operation; simultaneously, the contact curvature between balls and raceways is optimised to a state less prone to stress relaxation. This means that even under demanding conditions of tens of thousands of reciprocations per day, the screw's reversal response remains as tight as new, without the troubling "idle travel".

 

NMT leadscrew support bearings adopt international standard external dimensions and are available in P5, P4, and P2 precision grades to suit different accuracy requirements of machine tools and automation equipment. Paired bearings, special clearance, and special lubrication solutions are available.

 

Core Product Advantages

High rigidity—precise contact angle design and optimised internal load distribution, strong overall bearing group rigidity, minimal leadscrew system deformation under cutting forces;

 

Low friction—synergistic control of raceway roundness and waviness within extremely small tolerance windows, combined with low-vibration cages, negligible noise and temperature rise at high speeds;

 

High precision—P5, P4, P2 precision grades available, stable rotational accuracy control, ensuring leadscrew system repeat positioning accuracy;

 

Long life and preload retention—special dimensional stabilisation heat treatment resisting micro-deformation during long-term operation, optimised contact curvature less prone to stress relaxation;

 

Multiple pairing configurations—back-to-back, face-to-face, tandem available, meeting different preload and rigidity requirements;

 

Multiple contact angles—15° for high-speed light-load, 25° for general-purpose, 40° for heavy-load axial, flexibly adapting to different conditions;

 

High cleanliness and thermal stability—low particle generation and stable temperature rise control, adapting to semiconductor, medical, and other sensitive environments;

 

International standard external dimensions—direct interchangeability with mainstream brand products, convenient for fitting and maintenance.

 

Typical Applications

CNC machine tool feed axes—high-rigidity low-friction support, ensuring machining accuracy and surface quality; Industrial robot Z-axis modules—precision retention and preload stability under frequent reciprocating motion; Semiconductor equipment precision platforms—low-particle, low-vibration precision linear transmission in clean environments; Automated placement and assembly equipment—reliable support for high-speed high-accuracy positioning; Medical rehabilitation robots—low-noise, thermally stable precision linear motion; 3C electronics manufacturing equipment—durable support for high-frequency short-stroke reciprocating motion; Measurement and inspection equipment—micron-level positioning accuracy assurance; Laser processing equipment—high-speed high-accuracy linear transmission.

 

Quality Assurance

NMT leadscrew support bearing quality assurance covers the entire process from raw materials to finished products. High-purity alloy steel undergoes spectral analysis, inclusion rating, and grain size testing upon incoming inspection. Steel undergoes vacuum degassing refining, controlling non-metallic inclusions to extremely low levels, establishing the physical foundation for long life. Precision forging and special dimensional stabilisation heat treatment ensure rings resist micro-deformation during long-term operation. Raceway roundness and waviness are synergistically controlled within extremely small tolerance windows. Raceways undergo precision grinding and superfinishing with strict contact angle tolerance control. Rolling elements undergo multi-stage grinding and precision grading with excellent dimensional consistency. Cages use low-friction materials and precision machining to ensure stable guidance at high speeds. Assembly takes place in constant-temperature clean environments with precise preload control of paired bearings. Finished products pass torque, vibration, rotational accuracy, and run-in tests, with complete data archived. Rust-preventive packaging ensures flawless delivery.

 

Product Range

Angular contact ball bearing series—15°, 25°, 40° contact angles available, single-row and paired configurations; Thrust angular contact ball bearing series—high axial rigidity, adapting to precision leadscrew support; Deep groove ball bearing series—general support and auxiliary transmission; P5, P4, P2 precision grades available; Back-to-back, face-to-face, and tandem pairing configurations available; Special clearance and special grease solutions available.

 

Brand Strength

NMT has been dedicated to the research, development, and manufacturing of precision bearings for over a decade. As a precision category within the NMT product portfolio, leadscrew support bearings serve CNC machine tools, industrial robots, semiconductor equipment, medical equipment, and other precision manufacturing sectors with high rigidity, low friction, and long life characteristics. The company operates complete precision machining production lines, professional testing laboratories, and an experienced technical team.

 

NMT has not rushed to expand its product lines but has instead poured decades of accumulated superfinishing capability into the specialised field of leadscrew bearings. When equipment is opened for inspection after two or three years of operation, the preload remains full, raceway surfaces remain as smooth as new. With reliability that speaks for itself and withstands the test of time, NMT provides solid assurance for every precise linear movement.