Z Axis Dial Ring Lock Nut for Milling Machine M2/M3/M4 and M5 Model C-8688

High Measurement Accuracy – Provides precise linear position feedback, improving machining accuracy and reducing manual reading errors.

Smooth and Stable Operation – The optical scale delivers consistent, vibration-resistant performance during milling operations.

Durable Build Quality – Constructed with a sealed aluminum housing to protect internal components from dust, oil, and coolant.

Clear Digital Readout – Ensures easier and faster measurement visibility compared to conventional mechanical dials.

Long Service Life – Anti-wear internal components and corrosion-resistant body enhance longevity in industrial environments.

Easy Installation – Designed with standard mounting holes and brackets suitable for most turret and vertical milling machines.

Improves Productivity – Reduces setup time and increases machining efficiency by providing real-time measurement feedback.

Low Maintenance Requirement – Sealed, maintenance-free design reduces downtime and service needs.

Compatible with Multiple Axes – Suitable for X, Y, or Z axis installation on turret milling machines.

Enhanced Operator Safety – Eliminates the need to manually read scales while the machine is running, minimizing operator risk.

Simple & strong design

Easy drop-in replacement for worn-out bushings

Restores smooth movement of machine axes

Protects lead screw and feed assembly

1. C86+88 – For Z Axis
2. Z-axis quill or knee feed assemblies
3. Specifically designed for the vertical (Z-axis) feed mechanism
4. Has a black knurled ring
5. Internal threading and shoulder dimensions differ from XY type
6. Ensures smooth feed control on X, Y, and Z axes
7. Used on the knee vertical feed or sometimes quill feed depending on machine model
8. Built to handle higher load due to Z-axis weight and gravity stress
9. Connects feed handle/dial to lead screw
10. Maintains alignment and accurate rotational transmission
11. Reduces wear on screw and housing

1. Turret milling machines
2. Bridgeport-type vertical mills
3. CNC/manual conversion machines
4. Mill-drill machines supporting similar bush sizes
5. Provides smooth rotational support for feed screws
6. Reduces backlash and improves axis movement precision
7. Ensures stable alignment of lead screw during operation
8. Suitable for both repair and replacement applications

The Feed Screw Bush (Models C86+88 for Z Axis) is a precision-engineered replacement part designed for a wide range of Turret Milling Machines, including Bridgeport-type vertical mills. These bushings play a crucial role in providing smooth linear motion and stable rotational support for the feed screw, ensuring precise travel of the machine’s table and quill.

The C86+88 model, designed specifically for the Z-axis, provides enhanced stability for vertical feed operations, making it ideal for quill feed and knee movement applications.