Make sure you have all the parts you need for a smooth and painless assembly; open all boxes and unwrap the parts. Drag chains are stored inside the rails, please check there.
AltMill 4×8 Kit Parts List
Box 1 – Right Y-axis Rail Box
- 1x 4×8 Y-axis Rail Assembly – Long
- 1x 4×8 Y-axis Rail Assembly – Short
- 3x Crossbeam Extrusion
- M5-20 XL Tall Socket Head Cap Screw
- M5 Swingarm Tensioning Bolt
- M12, 12mm Diameter Shoulder Bolt
- 12mm Custom Washer
- M6, 8mm Diameter Shoulder Bolt
- M4 SHCS – 18mm
- M5 SHCS – 16mm
- M6 BHCS – 14mm
- M6 Twist-In 30 series T-nut
- M5 SHCS – 10mm
- M6 BHCS – 10mm
- M6 BHCS – 14mm
- M6 Flanged BHCS – 35mm
- M6 BHCS – 25mm
- M5 SHCS – 16mm
- M5 SHCS – 45mm
- M5 20S T-Nut
- M5 Washer
- M5 SHCS – 10mm
- M5 SHCS – 16mm
- M5 20S T-Nut
- M5 Nylock Nut
- M4 SHCS – 8mm
- M4 Twist-in 20 series T-Nut
- Hex Key (L Style) – 4mm
- Hex Key (L style) – 6mm
- Hex Key (Wrench with Blue Handle) – 4mm
- Hex Key (Wrench with Blue Handle) – 3mm
- AltMill Wrench

Box 2 – Left Y-axis Rail Box
- 1x 4×8 Y-axis Rail Assembly – Long
- 1x 4×8 Y-axis Rail Assembly – Short
- 3x Crossbeam Extrusion

Box 3 – Leg Box
- 8x Table Leg
- 1x 4×8 LH Tension Bracket + DC Mount
- 1x 4×8 RH Tension Bracket
- 2x Gusset
- 2x Y-axis Jointing Plate
- 4x Y-axis End Plates
- 1x 4×8 Z-axis Drag Chain Bracket
- 1x 4×8 Z-axis Drag Chain Arm
- 1x Linear Rail Alignment Tool (packed with M8-14mm)
- 1x Rack Joint Section
- 1x Rack Joint Alignment Clamp
- 2x M5 Cross Dowel
- 4x Y-axis Sensor Flag
- 4x Pigtail Inductive Sensor
- 5x 4×8 Y-axis Bumpstop
- 4x Integrated Sensor Bumpstop
- 6x Ziptie (4″)
- 8x Leveling Feet
- 1x Integrated Motor Cable Set
- 4x Motor Cover
- 1x Closed Loop Stepper Motor Fasteners and Hex Key Set

Box 4 – Leg Support Box
- 2x Y-axis Leg Support Extrusion
- 4x X-axis Leg Support Extrusion
- 1x 26×60 Drag Chain – 3392mm Length
- 2x Drag Chain Carrier Extrusion

Box 5 – X-Axis Rail Box
- 1x X-axis Assembly
- 1x 1900mm Drag Chain
- 3x Crossbeam Extrusion
- 1x 48V 12.5A Power Supply
- 1x 80mm Spindle Mount

Box 6 – Supplemental Parts Box
- 1x Y-axis Gantry Plate – LH
- 1x Y-axis Gantry Plate – RH
- 1x Z-axis Assembly
- 1x Nema 23 Motor (57-76) with Coupler
- 2x Swingarm Drive Unit Assembly
- 1x SLB-EXT Controller
- 1x SLB Emergency Stop Assembly
- 1x 3D Printed E-stop Mounting Bracket
- 1x SLB Emergency Stop Cable
- 1x USB-C Cable
- 1x Z-axis Drag Chain
- 2x Cable Cover
- 1x Lithium Grease Container

