October 18, 2013

How We Make It: Post production (polishing) on a Profile stem.

Once a Mulville stem body and cap come out of the machine, the finishing process is only half way done.
We actually hand polish stems as people need them. For instance, if Circuit BMX Shop in New England orders a polished stem, below is the process we have to complete to get it out the door…

#1: Grab the correct size stem body and cap. Grab de-burring tools.

01 Stem Body and Cap with de-burring tools

#2: De-burr the cap, getting rid of all excess material attached to the radius

02 Cap de-burring

#3 and #4: De-burr the stem body.

03 Stem Body de-burring04 Stem Body de-burring continued

#5 and #6: Take the stem body and cap to the polishing wheel and polish to a mirror finish.
This process takes about five minutes.

05 Polishing wheel06 Polishing wheel continued

#7: “Cook” stem and cap in an ultra-sonic cleaner.

07 Cleaning in Ultrasonic bath

#8: Dry off, thread bolts and package.

08 Ready for packaging

October 18, 2013


We are taking precautions to protect our employees and follow CDC and state guidelines. In the meantime, our machine shop is still running, we're here to assist you and we'll be shipping product to help support bike shops during this difficult time.