Parker 3902 Precision Ball Bearing Linear Stage Single Axis

Product Description

The PARKER 3902 is a single-axis precision ball bearing linear positioning stage designed for applications requiring repeatable, low-friction linear motion. Rated for a 6 lb load capacity, it provides 0.5 inches of travel via a center drive mechanism. The table measures 1.25 inches long by 1.25 inches wide by 0.5 inches high and weighs 0.16 pounds. Six 4-40 threaded mounting holes are distributed across the table for secure integration into test fixtures, optical benches, instrumentation assemblies, or compact automation platforms. This stage is installed by mechanical engineers, precision assembly technicians, and instrumentation specialists working in laboratory and light industrial environments.

The PARKER 3902 is suited for small-format single-axis positioning tasks where precise, controlled linear displacement is required. Typical applications include optical component alignment, sensor positioning, and benchtop automation fixtures. Its compact footprint and 4-40 mounting hole pattern make it compatible with standard miniature fastener hardware commonly used in instrumentation and laboratory equipment builds. The center drive configuration allows direct actuation from the table centerline, which simplifies load alignment in many mounting configurations.

Key Features

• Precision ball bearing design for smooth, low-friction linear travel
• 0.5 inches of linear travel via center drive mechanism
• 6 lb load capacity suitable for light instrumentation and sensor payloads
• Six 4-40 mounting holes with 0.75 inch center-to-center hole spacing
• Compact form factor: 1.25 inches long by 1.25 inches wide by 0.5 inches high
• Single-axis configuration for straightforward linear positioning setups

Compatibility

Designed as an OEM-style precision linear stage for single-axis positioning assemblies requiring a 4-40 mounting hole pattern and center drive actuation.

Installation Notes

Installation is typically performed by instrumentation technicians or mechanical assemblers using standard 4-40 fasteners and appropriate hand tools. Ensure the mounting surface is flat and rigid to maintain stage accuracy and prevent binding during travel. Avoid side-loading the stage beyond its rated 6 lb capacity, as off-axis forces can reduce bearing life and positioning repeatability. Verify that the drive mechanism is properly aligned before applying load to the table.