I was asked to make a couple of replacement RC100 stem units by another member. One at 90º 115mm, the other 100º 100mm.
As someone who designs and makes stuff for a living, I didn't want to completely copy the Pace stem, the original design is their IP.
So this is all TIG welded, no brazing, and uses a Columbus steerer tube, rather than the Reynolds of the original:
2 sets of parts cut:
-Columbus steerer tubes,
-Stem sections 1" x 0/049" seamless 4130,
-Stem clamps 1.125" x 0.058" 4130,
-Headset rings 1.125" x 0.058" 4130,
-Stem clamp bolt units,
-Thick 4130 washers,
-M6 threaded inserts.
Welded at 90º, marked up to mitre the clamp section:
Bar clamp mitre cut on mill:
All held square, ready for welding:
Clamp and headset collar tacked on:
Clamp and headset collars welded:
Bottom end cut to length (212mm from headset collar), end cap welded on including M6 threaded insert:
Cut clamp slot, file around bottom weld, deburr...All done:
Came out a bit lighter than the original which was 462g incl paint), so 'stem' section may have been heavier gauge, 0.058"?
All the best,
As someone who designs and makes stuff for a living, I didn't want to completely copy the Pace stem, the original design is their IP.
So this is all TIG welded, no brazing, and uses a Columbus steerer tube, rather than the Reynolds of the original:
2 sets of parts cut:
-Columbus steerer tubes,
-Stem sections 1" x 0/049" seamless 4130,
-Stem clamps 1.125" x 0.058" 4130,
-Headset rings 1.125" x 0.058" 4130,
-Stem clamp bolt units,
-Thick 4130 washers,
-M6 threaded inserts.
Welded at 90º, marked up to mitre the clamp section:
Bar clamp mitre cut on mill:
All held square, ready for welding:
Clamp and headset collar tacked on:
Clamp and headset collars welded:
Bottom end cut to length (212mm from headset collar), end cap welded on including M6 threaded insert:
Cut clamp slot, file around bottom weld, deburr...All done:
Came out a bit lighter than the original which was 462g incl paint), so 'stem' section may have been heavier gauge, 0.058"?
All the best,
