Linear Bushing TOPBALL Series
The NB TOPBALL Linear Bushing is a high load type linear bushing bearing with the mechanism utilizing the rolling motion of ball elements. NB's self-aligning TOPBALL linear bushing can be designed into many different applications such as factory automated equipment, machine tools, industrial machines, electrical equipment, optical and measuring instruments.
The TOPBALL linear motion mechanism is a self-aligning high load capacity linear ball bushing incorporating many unique features that make it an excellent choice for a wide range of applications. TOPBLOLL linear ball bushings are often used in automated factory equipment and industrial machines, optical and measuring instruments, and any other application that requires precision, light weight and low cost.
TOPBALL products incorporate many features not found on conventional bushings, including:
To avoid problems caused by mounting or machining errors, or by shaft deflection, TOPBALL load plates feature tapered ends that compensate for slight misalignments. This ensures more accurate performance with fewer adjustments when installing the product.
A floating seal helps maintain alignment while also ensuring the TOPBALL load plate remains consistently in contact with the shaft. Best of all, this is done without affecting the shape or length of the bushing, making TOPBALL bearing and linear pillow blocks suitable for miniaturized designs.
Configure the TOPBALL linear ball bushing bearing to the specific requirements of your application by using its adjustable load plates to set the desired clearance level between ball and shaft components.
Together, these unique features provide TOPBALL linear pillow block bearings with many key benefits, including:
Likewise, higher load capacities also translate to longer travel life. Compared to conventional linear ball bushings, TOPBALL products offer up to 27 times the travel life.
The precisely ground load plates allow TOPBALL to deliver rated capacity up to three times higher than conventional linear ball bushings.
TOPBALL is suitable for use in many high-speed applications, including systems moving at up to 3m/s.
For more information about the benefits of choosing TOPBALL plastic linear bearings for your application, contact an NB representative directly.
A diverse range of products supports potential applications for TOPBALL linear ball bushings. TOPBALL series are available in metric (TK) and imperial (TW) configurations. Both include conventional closed- and open-type linear bushings, as well as the TOPBALL pillow block unit design, which optimizes performance to a specific bore tolerance.
TOPBALL products have many mounting options. TK-type units should be press-fitted onto the housing bore, without applying excessive force or shock loading. TW-type TOPBALL components offer various mounting methods according to the intended application.
You can use NB TOPBALL linear pillow block bearings with high-precision shafts and housings. Variances in surface roughness, hardness and diameter will all affect performance and potentially reduce travel life. Please consult product literature for recommended tolerances and other installation requirements.
NB's uniquely designed load plate provides circular arch contact to the ball element resulting in a greater dispersion of the load, enabling TOPBALL Linear Bushing to provide up to three times the load capacity therefore 27 times the travel life of conventional slide bushings.
Load plates are thinner at the ends to provide a pivot point at the center of the plate. The center acts as a fulcrum to compensate for any slight misalignment between the shaft and the housing bore that might be caused by inaccurate machining, mounting errors or shaft deflection.
NB's unique floating seal design allows for selfalignment while maintaining equal and constant contact to the shaft. Seals do not add to the overall length of the bushing allowing for more compact designs.
TOPBALL Linear Bushing meets high speed requirements. The maximum speed is 180m/min.
TOPBALL Linear Bushing's load plates are designed to "float" in the outer sleeve which allows for clearance between the ball elements and shaft to best suit application requirements.
This is a TOPBALL Linear Bushing housed unit with pillow block. The pillow block has the most appropriate bore tolerance that optimizes TOPBALL's performance.