Pace Stem combo reproduction

danson67

Retrobike Rider
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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:

88270b62-b7b1-486b-b552-ac74f14aabe6_zpsf6183fac.jpg


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.

PA043146_zpsfd27d4fb.jpg

Welded at 90º, marked up to mitre the clamp section:
PA043151_zps86e7198c.jpg

Bar clamp mitre cut on mill:
PA043152_zps60236f74.jpg

0df42571-ba31-48bc-802a-fb0311c0f17f_zps28e5e040.jpg

PB243207_zpsb47c4307.jpg

All held square, ready for welding:
87aa4128-83d1-47bd-9026-955a8468bead_zps89e0f629.jpg

Clamp and headset collar tacked on:
PB243212_zps6d7c917b.jpg

Clamp and headset collars welded:
b7c4fd31-0464-4f3c-a926-8565187aa9a3_zps000c6e2b.jpg

PB253215_zps73a66850.jpg

Bottom end cut to length (212mm from headset collar), end cap welded on including M6 threaded insert:
PB253216_zps0d813734.jpg

Cut clamp slot, file around bottom weld, deburr...All done:
22ac6c4b-7ac5-4976-b651-f14382debcf2_zps0c2806c1.jpg

Came out a bit lighter than the original which was 462g incl paint), so 'stem' section may have been heavier gauge, 0.058"?
PB253224_zps99c75763.jpg


All the best,
 
Re:

Those are excellent.
Been wanting one for my rc200 but only managed to find them in 1 1/8".
Looks like I best try to find some cash somewhere,they look mint.
Proper job.
 
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