The NL series ball transfer unit adopts an integrated fully enclosed dustproof structure, composed of a carbon steel chrome-plated housing, main load-bearing steel ball, built-in auxiliary small steel balls and precision limit collar. Integrally stamped and encapsulated without split screw structure, it features compact structure, no looseness or ball falling, dust and debris resistance for long-term continuous operation.
The NL series ball transfer units are flat embedded omnidirectional conveying parts customized for low-height spaces and thin worktables. Different from conventional high-profile ball units, they adopt a low and compact structure, specially designed for ultra-thin workbenches, micro conveying equipment and precision tooling devices. Made of high-quality carbon steel with chrome plating, the product features a mirror-bright smooth surface with uniform and full plating layer. It is rust-proof, corrosion-resistant and scratch-resistant, with an exquisite and clean appearance, perfectly matching high-definition white-background main image display for independent websites, balancing practicality and visual texture.
The housing is made of high-strength carbon steel, precisely stamped, hard chrome electroplated and mirror polished. The high-hardness surface is wear-resistant, rust-proof and anti-oxidation, adapting to humid and dry alternating industrial workshop environments. The core rolling balls adopt high-precision bearing steel with quenching hardening and mirror polishing treatment, featuring ultra-low rolling resistance and smooth rotation. The internal precision assembly structure ensures uniform gaps, no jamming and no ball falling, with stable overall performance and longer service life than ordinary economical ball units.
Featuring an exclusive ultra-low flat design, NL series minimizes mounting height and solves the installation problem of conventional ball units on thin plates and low tooling tables. Adopting standard press-fit installation, it can be firmly fixed by direct pressing after hole drilling, with simple assembly, tight fitting and anti-loose performance. 360° omnidirectional rotation supports arbitrary translation, steering and fine adjustment of workpieces with quiet and stable operation without scratching precision parts. The enclosed dustproof structure effectively isolates dust and debris to prevent internal jamming, suitable for long-term continuous automatic operation in various light-duty and precision conveying scenarios.
The KSM NL low profile series is designed for space-constrained equipment where standard height ball transfers won't fit. Compact housing without sacrificing load capacity. Proudly manufactured by Shandong Guanbei Bearing Technology Co., Ltd. in Linqing, Shandong — China's bearing capital. Backed by 20+ years of precision bearing manufacturing experience.
The low-profile housing mounts flush with the deck surface, reducing overall height. Ideal for narrow conveyor gaps, compact machinery and equipment with limited vertical clearance. Common applications include conveyor transfer tables, assembly lines, packaging equipment and specialized industrial machinery.
Each unit undergoes 10,000-cycle load testing before shipment. Standard export packaging with anti-rust protection. Samples ship within 3–5 business days. Contact us for custom specifications or bulk pricing.
| Model | Ball Diameter | Mounting Hole | Total Height | Load Capacity | Application |
| NL-15 | 15mm | 15.2mm | 8mm(Ultra low profile) | 30kg | Micro precision equipment & testing jigs |
| NL-19 | 19mm | 19.2mm | 10mm | 60kg | Electronic production lines & light worktables |
| NL-22 | 22mm | 22.2mm | 11mm | 100kg | Automation tooling & small sorting machines |
| NL-25 | 25mm | 25.2mm | 12mm | 150kg | General conveyor & quality inspection platforms |
| NL-30 | 30mm | 30.2mm | 14mm | 200kg | Medium-duty material handling & transfer platforms |
| NL-38 | 38mm | 38.2mm | 16mm | 300kg | Heavy-duty plate conveying & industrial tooling |