01. Base Frame Assembly

2x 1000mm 40120 Extrusion [ 1500mm for the StrongHold ONE 750x1250 or 1250x1250 ]

920mm 4040 Extrusion [ 1420mm for the StrongHold ONE 750x1250 or 1250x1250 ]

2x 864mm 4040 Extrusion [ 1364mm for the StrongHold ONE 1250x1250 ]

2x 412mm 4040 Extrusion [ 662mm for the StrongHold ONE 1250x1250 ]

16x 4040 Cast Corner Assemblies

4x 4040 Extruded Corners Assemblies for the spoil board

864mm 4040 Extrusion

4040 Cast Corner Assembly

Install one corner assembly onto each end of the 4040 extrusion as shown. Tighten the M8x16 screw to secure them.

Ensure the corner assemblies are flush and square with the ends of the extrusions after tightening the screws

Repeat these instructions for the second 864mm 4040 extrusion

920mm 4040 Extrusion

4040 Cast Corner Assembly

Install corner assemblies on to both sides of each end of the 4040 extrusions as shown. Tighten the M8x16 screw to secure them.

Ensure the corner assemblies are flush and square with the ends of the extrusions after tightening the screws

412mm 4040 Extrusion

4040 Cast Corner Assembly

Install corner assemblies on to both sides of each end of the 4040 extrusions as shown. Tighten the M8x16 screw to secure them.

Ensure the corner assemblies are flush and square with the ends of the extrusions after tightening the screws

Front / Back Assembly from Step 2

Central Frame Support Assembly from Step 4

Position the central frame support in the middle of the assembly from Step 3, as shown.

Tighten the marked M8 cap head screws to secure the extrusions together

Repeat these instructions for the second central frame support

Middle Assembly from the previous step

Front & Rear Assemblies from Step 2

Position the three assemblies as shown

Ensure that the ends of all three 4080 extrusions are aligned

Tighten the marked M8 cap head screws to secure the extrusions together

1000mm 40120 Extrusion

Align each of the 40120 extrusions as shown

Ensure that the ends of both 40120 extrusions are aligned with the ends of the frame

Tighten the marked M8 Cap Head Screws to secure the base together

2x Rat Rig StrongHold ONE CNC - Motor Plate

2x Rat Rig StrongHold ONE CNC - Idler Plate

12x M12 Washer

12x M12x45 Cap Head Screw

4x M8x22 Cap Head Screw

4x M8 Washer

4x 4040 Drop-in T-Nut - M8

The main difference between the motor and idler plates is the Stepper motor mount holes.

Rat Rig StrongHold ONE CNC - Idler Plate

M8 Washer

M8x22 Cap Head Screw

4040 Drop-in T-Nut - M8

Make sure the counterbore for the bearing is on the same side as the T-Nut.

Loosely thread a 4040 T-Nut on to each of the M8x22 screws. Do not tighten them at this point.

Repeat these instructions for the second idler plate.

Set these assemblies aside until Steps 11 & 12

Rat Rig StrongHold ONE CNC - Motor Plate

M8 Washer

M8x22 Cap Head Screw

4040 Drop-in T-Nut - M8

Loosely thread a 4040 T-Nut onto each of the M8x22 screws. Do not tighten them at this point.

Repeat these instructions for the second motor plate.

Set these assemblies aside until Steps 16 & 17

Left idler plate Assembly from Step 9

Align the idler plate assembly with the base frame as shown

M12 Washer

M12x45 Cap Head Screw

Place an M12 Washer on to each M12x45 Cap Head screw and loosely screw them through the plate and in to the extrusion.

Do not fully tighten any of the M12 or M8 Cap Head Screws at this point

Right idler plate assembly from Step 9

Align the idler plate assembly with the base frame as shown

M12 Washer

M12x45 Cap Head Screw

Place an M12 Washer on to each M12x45 Cap Head screw and loosely screw them through the plate and in to the extrusion.

Do not fully tighten any of the M12 or M8 Cap Head Screws at this point

Right motor plate assembly from Step 10

Align the motor plate assembly with the base frame as shown

M12 Washer

M12x45 Cap Head Screw

Place an M12 Washer on to each M12x45 Cap Head screw and loosely screw them through the plate and in to the extrusion.

Do not fully tighten any of the M12 or M8 Cap Head Screws at this point

Left motor plate assembly from Step 10

Align the motor plate assembly with the base frame as shown

M12 Washer

M12x45 Cap Head Screw

Place an M12 Washer on to each M12x45 Cap Head screw and loosely screw them through the plate and in to the extrusion.

Do not fully tighten any of the M12 or M8 Cap Head Screws at this point

4040 extruded corner assembly (For the spoil board)

Position the 4040 extruded corner assembly in the middle of the extrusion gap as shown

The displayed measurement should be:

220mm for StrongHold ONE 750x750

345mm for StrongHold ONE 750x1250 or 1250x1250

Ensure that the top of the extruded corner assembly is flush with the top of the 4040 extrusions.

Fully tighten the M8 cap head screw to secure the extruded corner assembly to the frame

Repeat the above instructions for the remaining 3 extruded corner assemblies

Before continuing with the assembly, the frame must be squared and all screws full tightened

Using an engineers square, check that the side 40120 extrusions are square to the extrusions forming the base

On each side, tighten all of the following screws whilst continuing to check that the side extrusion remain square with the base:

4x M8x16 within the cast corners connected to the base

6x M12x45 on the motor and idler plates

2x M8x22 on the motor and idler plates

Once one side is fully secured and squared, proceed to repeat the process on the other side

After tightening all screws, check the entire frame once more for squareness. Correcting any issues now is easier than once the assembly is complete!

2x 1000mm HG15 Linear Rail with 2x Carriages

1500mm for a 750x1250 or 1250x1250 machine

34x M4x20 Cap Head Screw

50x for a 750x1250 or 1250x1250 machine

34x 4040 Drop-in T-Nut - M4

50x for a 750x1250 or 1250x1250 machine

2x align_40120_hg15 Printed Part

The linear rails are supplied with a protective oil coating on them. It is strongly recommended to prepare your work surface with paper towels and to wear disposable gloves.

Paper Towels

Linear Rail

Carefully open one end of the linear rail packaging and remove the rail. Place the rail upon the paper towels and dispose of the packaging

The oil on the rails protects them from rusting. Make sure not to remove all of the original oil during preparation.

The linear rail carriages are not interchangeable. Do not try to use a carriage on a different linear rail than the one it was supplied with.

With the rail still on the absorbent paper towels, carefully and slowly move the carriage from one end of the rail to the other

Both carriages should move smoothly over the entire length of the rail

Small changes in resistance are normal, but the carriage becoming very hard to push, or binding completely are not

Repeat the previous test whilst applying a small amount of force downwards on the carriage

The carriage will likely travel more smoothly when applying a downwards force, this is normal

Repeat the process to check the second carriage on the rail

If the carriage does not move smoothly, or binds completely, refer to the Linear Rail Troubleshooting Guide

Do not allow the linear rail carriages to leave the end of the rail at any point

HG15 Linear Rail

Insert an M4x20 cap head screw into each of the holes on the linear rail

Loosely thread a 4040 T-Nut on to each of the M4x20 screws

Repeat these instructions for the second linear rail

StrongHold ONE base assembly from Step 16

HG15 Linear Rail assembly from Step 20

Install the two HG15 40120 alignment tools as shown, this will make sure the linear rail is positioned correctly

Tighten every other M4x20 screw, starting from one end

Tighten the remaining M4x20 screws, starting from the same end as before

Remove the HG15 40120 alignment tools

Repeat the instructions in the previous step to install the second HG15 linear rail to the base assembly

2x 1057mm TR8x8 Lead Screw (1557mm for a 750x1250 or 1250x1250 machine)

2x Lead Screw Tensioning Nut

4x Thrust Bearing F8-16M

4x 688ZZ Ball Bearing

6x Lock Collar 8mm

4x Nut Block for TR8x8

8x M5 Nylon Locking Hex Nut

4x Precision Shim 12x8x1mm

Nut Block for TR8x8

M5 Nylon Locking Hex Nut

Insert the M5 Locking Hex Nut into the Nut Block

688ZZ Ball bearing

Push the ball bearing against the slot on the inner side of the plate.

Push the 688ZZ ball bearings against the slots on the inner sides of the plates.

While performing this step, make sure to support the Lead Screw to prevent it from bending

Lead Screw

Insert the Lead Screw from the back of the assembly through the hole in the ball bearing

Precision Shim 12x8x1mm

Slide the Precision Shim on to the Lead Screw.

Lock Collar

Slide the Lock Collar on to the Lead Screw.

Do not tighten the screw on the Lock Collar yet.

Nut Block for TR8x8

Screw the Lead Screw through both Nut Blocks.

Make sure the M5 Nylon Locking Hex Nuts on the Nut Blocks are facing the 40120 extrusion

Lock Collar 8mm

Slide the Lock Collar on to the Lead Screw

Do not tighten the screw on the Lock Collar yet.

Precision Shim 12x8x1mm

Slide the Lock Collar on to the Lead Screw

Pull the Lead screw through the ball bearing inserted on the idler plate.

Thrust Bearing F8-16M

Tensioner Nut

Install the Thrust Bearing on to the exposed end of the Lead Screw as shown

Screw the Tensioning Nut on to the end of the lead screw

Do not tighten the screw on the Tensioner Nut yet.

Thrust Bearing F8-16M

Lock Collar

Do not tighten the screw on the Lock Collar yet.

Slide the Thrust Bearing and Lock Collar on to the Lead Screw as shown.

Repeat Steps 27 through 32 to assemble the remaining Lead Screw

The Lead Screws will be fully tensioned and adjusted later in the assembly process