Bike ISCG-05 Bash Guard / Chain Guide

UPDATE 05.20.2023: V2 bash guard added to the files. I broke one and made the mounts slightly thicker. I also started to print it out of PC blend.

ISCG-05 3D printed / titanium Bash guard & Chain guide. You can use whatever material you'd like for the plate but I chose titanium. Plate thickness must be .187" (4.75mm) +/- to be flush with the replaceable bash guard without modification. This guide/guard will fit a maximum 32 oval or 34 circle chainring. You can go any size below that if you want.

What you need:

• Laser/plasma cut metal plate (I used Sendcutsend and .187" grade 5 titanium, ~$38)
• Low profile binding barrel and screw (https://www.mcmaster.com/99024A327/, ~$14)
• Narrow Fillister Head slotted screw (https://www.mcmaster.com/91794A196/, ~$11)
• Stainless steel button head screw (https://www.mcmaster.com/94500A315/, ~$11)

Printing:

• For both the chain guide and the bash guard, the current STL orientation is the best.
• Use supports on bash guard portion.
• 100% infill with at least 5 perimeters
• I used PETG for both, ABS, ASA, PC, or Nylon should all work as well.

Assembly:

• Once you have your plate cut out and parts printed, use two binding barrels and screws to attach the bash guard to the metal plate. It will be a tight fit.
• Take a female binding barrel and one of the narrow fillister head slotted screws to attach the chain guide. Loosen the screw to adjust the height of the chain guide.
• Attach to the ISCG-05 mounts on your bike using the SS button head bolts.
• I recommend a medium-strength Loctite on all the threads but the button heads, use grease for these.
• You may need a spacer behind the plate to get the correct alignment, plastic washers work.

If you break a bash guard just print a new one. I broke one weaker version and modified the bash guard to what it currently is.

Total cost: ~$74, still cheaper than any other nice bash guard/chain guide. If you can find the hardware as individual pieces, you can significantly reduce the price.