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. TOPBALL 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.

Self-aligning load plates

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.

Floating seals

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.

Adjustable clearance

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:

Longer travel life

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.

Higher load capacity

The precisely ground load plates allow TOPBALL to deliver rated capacity up to three times higher than conventional linear ball bushings.

Higher speed

TOPBALL is suitable for use in many high-speed applications, including systems moving at up to 3m/s.

The NB Slide Bush is a linear bushing with mechanism utilizing the rolling motion of ball elements. Since linear motion is obtained with simple mechanism, the linear bushing can be used in a wide variety of applications, including transportation , food processing and semiconductor manufacturing equipment.

Key Features At-a-Glance

NB linear bushings consist of an outer cylinder and ball retainer that houses the bushing components. Key benefits of NB linear bushings include:

• A space-saving round shaft that allows for smaller component designs, lighter overall weight and other engineering advantages
• A precision-ground raceway surface that minimizes contact with ball elements, reducing friction and providing smoother linear movement
• A double-lip seal that reduces grease leakage while preventing dust and other foreign particles from damaging bushing components
• Seamless compatibility with a wide range of shaft types

The NB STROKE BUSH is a linear and rotational motion mechanism utilizing the rotational motion of ball elements between an outer cylinder and a shaft. It is compact and can withstand high loading. The retainer is made of a light metal alloy with high wear resistance. Smooth motion is achieved under high-speed and high-acceleration conditions. Although the linear motion is limited to a specific stroke length, the combined rotation and stroke motion is achieved with very little frictional resistance. The NB STROKE BUSH can be conveniently used in a variety of applications.

Features and Benefits At-a-Glance

NB linear stroke bushings consist of a high-carbon chromium bearing steel outer cylinder with a precision-ground inner surface, a light metal alloy retainer that keeps ball elements in position, and a stopper ring and inner seal to prevent contamination. While this type of design limits the amount of linear motion stroke, it offers many benefits, such as:

• High resistance thanks to heat-treated and ground metal and alloy components that are designed for heavy-duty use
• Smooth performance in both high-speed and high-acceleration conditions, with exceptional rigidity and accuracy
• Easy installation with uniform dimensions and various mounting options
• Reduced size and weight for compact equipment
• Fewer maintenance requirements thanks to an easy-to-lubricate design

Configuration Options

SR linear stroke bushings are available in a range of different sizes and configurations to better suit the diverse needs of today’s equipment and component manufacturers. Specific options within the SR product line include:

• Standard type SR bushings in a range of sizes from 6-100mm inner contact diameter
• SR-UU type bushings with dual-sided seals, available in the same sizes as the standard SR-type products
• SR-B linear bushings, for applications requiring load ratings up to 13,700N (dynamic) and 29,400N (dynamic)
• SR-BUU type bushings, with double-retainer and double-seal configuration

NB SLIDE ROTARY BUSH RK type is a highly accurate and high load capacity bearing providing smooth continuous linear and rotational motions. Its structure imposes no constraints on linear and rotational motions. It is much more compact than a standard slide bush with separate rotational bearing.

This retainer gives a smooth motion in a high rotational application. SM type SLIDE BUSH is incorporated, providing the stable and smooth linear motion. Relatively large ball elements are used for high load capacity.

1. A smooth unlimited linear and rotational motion is obtained.
2. There is no need to machine separate housing.
3. High accuracy is ensured for extended period of usage.
4. Its high compatibility eliminates replacement problems.
5. High rigidity enables it to withstand an unbalanced load and large load.

The NB SLIDE ROTARY BUSH SRE SERIES provides rotary and linear motion functions. Linear motion with unlimited stroke and rotary motion are merged into a single bush resulting in great space saving compared with a combination of any conventional bearings. There are three types; standard, flange, and unit type with sizes ranging from 6 to 40.

Features and Benefits At-a-Glance

SRE linear rotary bearings consist of a steel outer cylinder, an inner retainer holding a series of ball elements in place and a side ring. The retainer itself has been engineered to move freely in any direction, allowing for unlimited rotational and linear movement while keeping load distribution uniform while in operation.
NB SRE linear rotary bearings have many advantages over conventional bearing products, including:

Smaller Footprint

The ability to perform more functions while taking up less space is a key engineering concern in many industries. By combining linear and rotary movement functions in a single component, SRE bearings allow for smaller devices, lighter weights and fewer maintenance requirements.

High Load Capacity

By using larger-diameter steel ball elements than similar products, NB linear rotary bearings can support loads up to 3180N (dynamic) or 8040N (static) in double-wide block configurations.

Smooth Operation

SRE bearing retainers keep ball elements positioned in a circular formation at all times. This provides smooth linear and rotary motions when installed in either direction.

Configuration Options

As noted above, the SRE series of products offers three main configuration options:

1. Standard linear rotary bearings with inner diameters ranging from 6mm to 40mm
2. Square flange linear rotary bearings with four mounting holes, available with inner diameter sizes ranging 6mm and 40mm
3. Unit bearings, available with several different block options: standard single and double-wide, compact single and double-wide, and pillow-type.

The NB SLIDE SCREW can be used as a transport device in many types of machines, whose application is not intended for accurate positioning requirements.

Structure and Advantages

The NB SLIDE SCREW converts rotational motion into linear motion by utilizing the friction between radial ball bearings and a shaft. This simple mechanism eases maintenance and installation work.

The NB SLIDE SCREW consists of two aluminum blocks, each with three radial bearings with a fixed angle between them. A round shaft is inserted between the two blocks, and its rotation produces linear motion determined by the contact angle between the shaft and the bearings. For variable loads, the thrust is adjusted by turning the spring loaded thrust adjustment bolts.

Linear Motion on Round-shaft

The NB SLIDE SCREW is suitable for long-stroke applications using a standard linear shaft.

No Lubrication Required

The bearings are pre-lubricated with grease prior to shipment, so there is no need to apply lubrication other than to the drive shaft to prevent corrosion.

High Machine Efficiency

The NB SLIDE SCREW utilizes the rotational motion of the bearings and drive shaft to achieve machine efficiency as high as 90%.

Excessive Load Prevention Mechanism

When an excessive load is applied, the screw will stop due to slippage, thereby preventing accidents.