Vlier BML8AN Threaded Ball Plunger M8 X 1.25 Steel

Product Description

The VLIER BML8AN is a threaded ball plunger designed for positioning, indexing, and light-duty detent applications in industrial assemblies. It features an M8 x 1.25 thread, a steel body, and a steel ball with a diameter of 0.196 inches (5.00 mm). The body length measures 0.63 inches, and the ball extends a maximum of 0.059 inches (1.50 mm) under load. A built-in locking element secures the plunger in position after installation, preventing back-out under vibration. Initial end force is 1.12 pounds, with a final end force of 2.25 pounds, making it suitable for light to moderate detent resistance requirements. Machinists, tool and die technicians, and industrial maintenance mechanics typically install and service these components.

This ball plunger is used in manufacturing fixtures, machine tool assemblies, jigs, workholding devices, and precision positioning mechanisms where repeatable detent action is required. The M8 x 1.25 thread suits metric-threaded bores common in industrial equipment and fabricated assemblies. The locking element allows the plunger to be torqued into a tapped hole without requiring thread-locking compounds. It is identified by a purple color code for quick on-bench identification during assembly work.

Key Features

• M8 x 1.25 threaded body for direct installation into metric-tapped bores
• Steel body and steel ball for durability in industrial environments
• 0.196 inches (5.00 mm) ball diameter with 0.059 inches (1.50 mm) maximum ball reach
• Built-in locking element prevents back-out under vibration without thread-locking compound
• 1.12 pounds initial end force and 2.25 pounds final end force for light-to-moderate detent applications
• Purple color code for fast identification during assembly

Compatibility

Designed for installation in any metric-threaded bore sized M8 x 1.25, as commonly found in industrial fixtures, machine tool components, and precision positioning assemblies.

Installation Notes

Installation requires a properly tapped M8 x 1.25 through or blind hole of sufficient depth to accommodate the 0.63-inch body length. De-energize or lock out any machinery before servicing components in the assembly. Use an appropriate hex key or spanner to drive the plunger; the locking element engages as the plunger is seated. Do not over-torque, as this may damage the locking element or deform the tapped bore.