Hollowtech II Set (Two Bolts and Wrench)

I damaged the bolt on my Deore M5100-2 crankset and immediately discarded it. I needed a new one, so I took the original from a 105 RD-7000 crankset and modeled it, making adjustments for 3D printing.

Unfortunately, bolts are generally divided into two categories: MTB and road bikes. Since I had already modeled the thread and hole profile, I used photos of the originals to create an MTB-specific bolt as well.

Both bolts are compatible with the original wrench, and vice versa—the wrench is compatible with the original bolts.

• The bolt in the "mtb_bolt" file should fit most MTB cranksets. It has a shorter thread and an open profile. Tested on Deore 5100.
  Reference: Y1F811100
• The bolt in the "road_bolt" file should fit most road bike cranksets. It has a longer thread and a closed profile. Tested on 105 7000.
  Reference: Y1P417000
• The wrench file h2_key differs from the original. I hope it will be better.

The bolts should be tightened with low torque. The hex key slots in the wrench are unnecessary since they make it easy to overtighten.

Recommended print settings:

• Bolts: PLA, 0.12mm layer height, 0.4mm nozzle (due to the thread)
• Wrench: PLA, 0.28mm layer height, 0.4mm nozzle

Print the bolts with the appropriate hole facing the build plate. Not too dense supports are recommended for road bolt. 

The bolt may be tight the first time you screw it in. I suggest lubricating the thread with any grease.