Monday, May 31, 2010

go big or go home

IMG_5186, originally uploaded by rackntroll.

we maxed it out at a 14 foot gap between launch and landing.
PS- thats not me!

Tuesday, May 25, 2010

machine mitered

up until today i have cut all of my miters by hand.
the miter for a straight blade unicrown fork seems very challenging to cut by hand, so i built a fixture (among other things) to hold and align the fork blades to cut the miter on the mill. 'twas a success!
this little machine can do a lot.

Thursday, May 20, 2010

another failure from the bike shop

IMG_5077, originally uploaded by rackntroll.

no one was injured!

Tuesday, May 18, 2010

Monday, May 17, 2010

up in the air

IMG_5068, originally uploaded by rackntroll.

hey if you're gonna put a big BMX jump in your yard, it might as well look like one, right?

Monday, May 10, 2010


advice, originally uploaded by signal cycles.

Thursday, May 6, 2010

Kona Ute child carrier rack

powdercoated by bonehead performance, and a super snazzy footguard made by lois.

it just keeps getting better

Tuesday, May 4, 2010

sub-project #2

project within a project within a project-

making a hybrid drawbolt. what i needed was a long bolt, an 8mm allen socket with 3/8-16 threads. not a common item.

whats a drawbolt? its a long bolt that goes through the spindle of a milling head that secures a tool on the other end. in this case the drawbolt will screw into the end mill holder seen in the previous post.

starts out as a common long M10 bolt

next the existing threads are cut off and the center gets drilled out

then we turn down some 3/8-16 all thread

they fit together nicely

i inserted a piece of silver into the hole, fluxed, heated, soaked, and wire brushed. the oddball bolt is done.

now here is what the drawbolt i made does-

the bolt goes through the spindle

a toolholder with an external taper fits into the internal taper on the other end of the spindle. it is threaded on.

then we tighten the bolt and it draws the toolholder into the spindle for a nice tight interface

then something is fixed into the tool holder, in this case the hole saw arbor i made yesterday.
almost fork time....
forkin great!

Monday, May 3, 2010


project within project. to complete the construction of my unicrown fork i needed to make an arbor for a hole saw.
i really cannot see handmitering a straight blade unicrown fork accurately to be possible, so i decided to machine miter the fork blades.
this is the first step towards my next fork. yippee!

this is the arbor i made on the lathe.

this is the arbor inserted into an end mill holder. the end mill holder is fixed in the milling head.

here it is with the hole saw threaded on. look out, fork blades!