new 1PC CNC 4th 5th Axis Rotary Table A B Axis DIY CNC Machine Milling Router Parts

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What Is the CNC 4th/5th Axis Rotary Table for DIY Milling Router?

This CNC 4th/5th Axis Rotary Table is a precision mechanical add-on that transforms a standard 3-axis CNC milling machine or router into a multi-axis machining center capable of simultaneous 4-axis or 5-axis operations. By mounting the workpiece on the rotary table's faceplate or chuck, you gain the ability to rotate the part around the A-axis (tilting) or B-axis (rotary), enabling complex geometries such as helical grooves, cylindrical engraving, gear cutting, and multi-sided machining without manual re-fixturing. The table is constructed with a worm gear reduction mechanism for backlash-controlled positioning, driven by a stepper motor (not included) that interfaces with your CNC controller's step/direction outputs.

In short: If you are adding a rotary 4th axis or a tilt-rotate 5th axis to your DIY CNC build, this table provides the mechanical foundation — order now from koeed.com with worldwide shipping.

Technical Specifications

Always verify center height, table diameter, and stepper motor frame size against your machine's specifications before purchase. A compatible stepper motor, driver, and controller are required for operation (not included).

Common Machining Applications

• Cylindrical Engraving: Rotary engraving of text, patterns, and graduations on cylindrical workpieces such as dials, knobs, and pen barrels
• Gear Cutting: Indexed cutting of spur gears, worm gears, and sprockets using the rotary axis for precise angular division
• Multi-Sided Machining: Mill all faces of a prismatic part in one setup by rotating the workpiece around the A and B axes
• Helical Milling: Create helical flutes on end mills, drills, and augers using coordinated linear and rotary axis motion
• 3D Contouring: Sculpted surface machining on curved parts using continuous 4-axis or 5-axis toolpath strategies from CAM software like Fusion 360 or Mastercam

Frequently Asked Questions

What stepper motor and driver do I need for this rotary table?

Most builders pair this table with a NEMA 23 stepper motor (torque rating 2.0–3.0 N-m) and a microstepping driver such as the TB6600 or DM542. For higher holding torque under cutting loads, step up to a NEMA 24 closed-loop stepper. Verify the shaft diameter on your motor matches the coupling bore on the rotary table's input shaft. If you need help selecting a motor, our team can recommend compatible options from our CNC components range.

How do I adjust backlash on the worm gear?

The worm gear assembly has an eccentric adjustment collar. Loosen the locking set screws, rotate the eccentric sleeve slightly to bring the worm closer to the gear (reducing clearance), then re-tighten. The ideal setting allows smooth rotation by hand with no perceptible free play when reversing direction. Over-tightening will cause binding and accelerated wear. Always re-check backlash with a dial indicator after adjustment — aim for less than 0.05 mm of angular backlash measured at the workpiece radius.

Can Mach3 or GRBL control this rotary axis?

Yes. Wire the stepper driver's step and direction inputs to your controller's A-axis or B-axis output pins. In Mach3, configure the axis as angular (degrees) in the motor tuning dialog and set the "steps per" value based on your microstepping setting and the worm gear reduction ratio. For GRBL-based controllers, you may need to configure the 4th axis as a linear axis with a calculated steps/mm value that translates angular motion into linear-equivalent units. Consult your controller's documentation for the specific configuration procedure.

What is the maximum workpiece weight this table can support?

The load capacity depends primarily on the worm gear ratio, bearing size, and the stepper motor's holding torque. For a typical DIY-class rotary table of this design, a conservative guideline is 5–15 kg for horizontal-axis (4th axis) operation and 3–5 kg for vertical-axis (5th axis trunnion) operation where gravity acts perpendicular to the rotation axis. Always balance heavy or asymmetric workpieces and use a tailstock for long parts to reduce cantilever loads on the rotary table bearings.

Does this table come assembled or as a kit?

This product ships as a pre-assembled mechanical unit. You will need to mount your stepper motor, wire the motor driver, and configure your CNC controller software. Basic mechanical assembly skills and familiarity with stepper motor wiring are required. If you need guidance, contact our support team for setup instructions.

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