Wednesday, July 28, 2010

now with springs!

IMG_5462, originally uploaded by rackntroll.

see those little springs in there? shimano barrel adjuster springs, the perfect size!
its so nice to open the vise and have the blocks stay put!

Tuesday, July 27, 2010

traveling light

IMG_5492, originally uploaded by rackntroll.

loaded up for work, just some shoes.

Thursday, July 22, 2010

new tool thursday

i became annoyed with clamping small diameter tubes in the vise, and fumbling around with my janky v-block made from 2x4 scraps. knowing that i would have to hand finish (de-burr and chamfer edges) a bunch of bronze bearings and their respective journals-- that was the final push to motivate me to make a new clamping block. here 'tis:

it has a lip to keep it from dropping out of the vise, im going to spring load it so it opens and stays in the vise as i open the jaws.

the 3 V's will accommodate sizes from 1/8 to 1/2".

Thursday, July 15, 2010

bronze bearings

making some test pieces for the bromke rack- bronze bearing in a steel journal.

i used a regular drill bit to open up the steel round bar to 3/8, but i think when i make them for real i need to bore it, for closer clearance between the bearing and journal. the drill bit cut it a little oversize.

that leaves me with another little project, make a boring bar holder for the lathe toolpost, or an easier but less versatile method i can grind a small enough boring bit out of HSS.

Tuesday, July 13, 2010

Bromke Rack

Brompton + Domke = Bromke

the first step in making a folding rack for a folding bike, designed to hold a domke F-6 camera bag.

Laura and Cate modeling the Domke F-6

luggage block that fits on the existing fittings found on the brompton headtube.

basically finished, still need to put some holes in it for the upcoming rack to mount to.

Tuesday, July 6, 2010

kinda like brazing, but not really!

IMG_5393, originally uploaded by rackntroll.

its O/A gas welding. practice for an upcoming project. ive experimented with gas welding once prior, on a much smaller scale.

so ya, its kinda like brazing, but not really. when brazing there is a lot of "flicking" the flame away to keep the tubes and brass from over heating. i had to fight that urge to flick away the flame. keep the tip buried in the molten pool and add filler (wire coat hanger in this case).

after i do this a couple more times ill get the hang of it, things wont be so ugly.

and of course TIG welding is on the distant horizon.

Sunday, July 4, 2010

keeping busy

finished my 2nd frameset, in between machining projects....need to stay busy in the barn. so i built a rack, used up the absolute last lengths of rack diameter tubing. i dont have any 3/8 or 5/16 tubing longer than 6" in stock! actually, the shape and size of this rack was dictated by how much tubing i had left to work with!!

in the picture below you can see it has dual headlight mounts, and double fender mounts. the double fender mount is nice bc you can remove the L-bracket from the fender and mount it exclusively to rack, on the underside of the platform and to the hole in the fork crown strap. as an added bonus this means you can remove the rack and front fender as a single unit.