This is based on a drum rack clamp from a Roland electronic drum set. The clamp is used to join 2 pieces of 1.5" tubing - should work with any brand of drum rack that uses standard round tubing.

The hardware required are 2 drum lug screws 1.5" long and two 12/24 hex nuts. Drum rack tubing can be purchased from a music store, but I've found that 1.25" electrical metal tubing or conduit will work as well.

UPDATE 2/22/2018
I've had a couple of the clamps fail in use so I've modified the design to make it stronger. Uploaded new STL file: Rack T Clamp HD

• Increased the wall thickness
• Moved the one bolt location closer to the end to reduce stress when clamping down on the pipe

My original prints were in PLA with 20% infill. I reprinted one in PETG still with 20% infill and that one failed also. In addition to the model redesign, I'm currently printing a new copy in PETG with 60% infill - hopefully this will now be strong enough.

Prusa

Prusa Mk2

Doesn't Matter

Yes

.2 layer height

35%

I printed this in PLA, which seems to be fine for my needs. ABS or PETG might be a better choice for durability, especially if using the clamp with an acoustic drum kit instead of electronic drums.

I had to use a small drum sander in a cordless drill to clean up the insides where the support pieces were attached.

I tried to copy the design of the original part from a Roland electronic drum kit. Still pretty new with Fusion 360, but I think it came out pretty close.