01. Base Frame Assembly

2x 1216mm 40120 Extrusion

1716mm for the StrongHold PRO 1000x1500 or 1500x1500

3x 1050mm 4080 Extrusion

1550mm for the StrongHold PRO 1500x1500

2x 488mm 4080 Extrusion

738mm for the StrongHold PRO 1000x1500 or 1500x1500

16x 4040 cast corner assemblies

4x 4040 extruded corners assemblies for the spoilboard

1050mm 4080 Extrusion

1550mm for the StrongHold PRO 1500x1500

4040 Cast Corner Assembly

Install one corner assembly onto each end of the 4080 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 4080 extrusion

1050mm 4080 Extrusion

1550mm for the StrongHold PRO 1500x1500

4040 Cast Corner Assembly

Install corner assemblies onto both sides of each end of the 4080 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

488mm 4080 Extrusion

738mm for the StrongHold PRO 1000x1500 or 1500x1500

4040 Cast Corner Assembly

Install corner assemblies onto both sides of each end of the 4080 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

Front / Back Assembly from Step 2

Central Frame Support Assembly from Step 4

Position the central frame support in the middle of the front or back assembly as shown

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

Repeat these instructions for the second base frame end

Middle Assembly from Step 3

2x Assemblies from the previous step

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

1216mm 40120 Extrusion

1716mm for the StrongHold PRO 1000x1500 or 1500x1500

Align the 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 PRO CNC - Motor Plate

2x Rat Rig StrongHold PRO CNC - Idler Plate

12x M12 Washer

12x M12x45 Cap Head Screw

8x M8x25 Cap Head Screw

8x M8 Washer

8x 4040 Drop-in T-Nut - M8

Rat Rig StrongHold PRO CNC - Idler Plate

M8 Washer

M8x25 Cap Head Screw

4040 Drop-in T-Nut - M8

Loosely thread a 4040 T-Nut onto each of the M8x25 screws. Do not tighten them at this point.

Repeat these instructions for the second idler plate as shown

Set these assemblies aside until Steps 11 & 12

Rat Rig StrongHold PRO CNC - Motor Plate

The motor plates have additional holes compared to the idler plates

M8 Washer

M8x25 Cap Head Screw

4040 Drop-in T-Nut - M8

Loosely thread a 4040 T-Nut onto each of the M8x25 screws. Do not tighten them at this point.

Repeat these instructions for the second motor plate as shown

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

4x 4040 Extruded Corner Assembly (For the spoilboard)

4x sh_pro_hg25r_end_spacer Printed Part

2x sh_pro_y_motor_nut_holder Printed Part

2x M5 Nylon Locking Hex Nut

Base frame assembly

Front right idler plate assembly

sh_pro_hg25r_end_spacer Printed Part

Insert the sh_pro_hg25r_end_spacer printed part in to the 40120 extrusion slot as shown. Slide it along the extrusion until it rests against the idler plate.

Insert a second sh_pro_hg25r_end_spacer printed part in to the 40120 extrusion slot as shown, but leave this one at the open end.

sh_pro_y_motor_nut_holder Printed Part

M5 Nylon Locking Hex Nut

Insert the M5 nylon locking hex nut in to the printed part

The blue nylon ring in the nut should face away, as shown

Insert the nut holder assembly in to the 40120 extrusion as shown

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

Repeat the instructions in steps 14, 15 & 16 to assemble the other side of the base frame

4040 extruded corner assembly (For the spoilboard)

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

The displayed measurement should be:

244mm for StrongHold PRO 1000x1000

369mm for StrongHold PRO 1000x1500 or 1500x1500

Ensure that the top of the extruded corner assembly is flush with the top of the 4080 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

4x M8x25 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 1190mm HG25 Linear Rail with 2x Carriages

2x 1690mm for a 1000x1500 or 1500x1500 machine

40x M6x25 Cap Head Screw

56x for a 1000x1500 or 1500x1500 machine

40x 4040 Drop-in T-Nut - M6

56x for a 1000x1500 or 1500x1500 machine

2x align_40120_hg25 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

HG25 Linear Rail

Insert an M6x25 cap head screw in to each of the holes on the linear rail

Loosely thread a 4040 T-Nut on to each of the M6x25 screws

Repeat these instructions for the second linear rail

StrongHold PRO base assembly from Step 19

HG25 Linear Rail assembly from Step 23

Insert the linear rail in to the top slot of the 40120 extrusion, between the 3D printed spacers

Install the two HG25 40120 alignment tools as shown, this will make sure the linear rail is positioned correctly

Tighten every other M6x25 screw, starting from one end

Tighten the remaining M6x25 screws, starting from the same end as before

Remove the HG25 40120 alignment tools

Repeat the instructions in the previous step to install the second HG25 linear rail to the base assembly

2x 1280mm 1610 Ball Screw (1780mm for a 1000x1500 or 1500x1500 machine)

2x FK12 Ball Screw Mount & Ball Screw lock nut (Packaged with the FK12 mount)

2x FF12 Ball Screw Mount & Circlip (Packaged with the FF12 mount)

2x 16mm Ball Screw Block

12x M5x20 Cap Head Screw

8x M4x20 Cap Head Screw

8x M4x25 Cap Head Screw

16x M4 Nylon Locking Hex Nut

1280mm 1610 Ball Screw (1780mm for a 1000x1500 or 1500x1500 machine)

Unpack and remove all protective packaging from the ball screw

Ball screw nut

Do not allow the ball screw nut to reach either end of the ball screw

16mm Ball Screw Block

Install the ball screw block onto the ball screw nut as shown

6x M5x20 Cap Head Screw

Install an M5x20 screw through each hole in the ball screw nut and into the ball screw block. Fully tighten each screw

Base frame assembly - rear right corner

FK12 Ball Screw Mount

Insert the FK12 ball screw mount in to the motor plate as shown

M4x25 Cap Head Screw

Insert an M4x25 screw through each of the four holes in the FK12 mount and through the motor plate

M4 Nylon Locking Hex Nut

Install an M4 locking hex nut on to each M4x25 screw and tighten fully

16mm Ball Screw Assembly from Step 27

Position the ball screw assembly so that:

The end with the thread faces towards the FK12 mount

The side of the ball screw block with the screw holes faces away from the frame assembly

Carefully feed the non-threaded end of the ball screw through the open hole in the idler plate

Align the threaded end of the ball screw with the hole in the FK12 mount

Whilst supporting the full length of the ball screw, insert the threaded end through the hole in the FK12 mount

The ball screw is a precision fit into the FK12 mount. Do not force the ball screw in to the mount. When correctly aligned, it should slide in with little effort

Check that the ball screw is fully inserted in to the FK12 mount before proceeding

There should be no gap between the end of the ball screw thread and the back of the FK12 mount

The screw threads on the end of the ball screw should be visible as shown

FF12 Ball Screw Mount

Install the FF12 ball screw mount on to the free end of the ball screw and into the opening on the idler plate

The ball screw is a precision fit into the bearing inside the FF12 mount. Do not force the ball screw into the bearing. When correctly aligned, it should slide in with little effort

Fully insert the FF12 ball screw mount into the opening in the idler plate

There should be no gap between the FF12 ball screw mount and the idler plate

FF12 Ball Screw Mount

M4x20 Cap Head Screw

Insert an M4x20 screw through each of the four holes in the FF12 mount and through the idler plate

M4 Nylon Locking Hex Nut

Install an M4 locking hex nut onto each M4x20 screw and tighten fully

FK12 Ball Screw Mount

Ball Screw Lock Nut

Fasten the ball screw lock nut on to the exposed end of the ball screw as shown

When the ball screw lock nut is fully tightened, use a 2mm hex key to tighten the grub screw within the lock nut. This will prevent the lock nut from loosening

Repeat steps 28 & 29 to install the left FK12 mount and ball screw

Remember to fully support the length of the ball screw until both ends are secured

Repeat steps 30 & 31 to install the left FF12 mount to the idler plate, securing the left ball screw

FK12 Ball Screw Mount

Ball Screw lock nut

Fasten the ball screw lock nut on to the exposed end of the ball screw as shown

When the ball screw lock nut is fully tightened, use a 2mm hex key to tighten the grub screw within the lock nut. This will prevent the lock nut from loosening

StrongHold PRO Front Left Corner

FF12 Circlip

Using a pair of circlip pliers, install the circlip on to the end of the ball screw

Make sure the circlip seats fully in the groove on the ball screw

Repeat the instructions to install the circlip on the right side ball screw

Test each of the ball screws by rotating them and checking that they rotate smoothly

Double check that all fasteners used on the ball screws and mounts are fully tightened

Check each ball screw for smooth movement once again, before proceeding to the next step