Some pics of a job I just finished.

Since being a member of this forum, I've posted
pictures of my shop and a few items, but I've
never shown any of the work I do. So in order to
give my self credibility, and to prove to a few
others my machining capabilities, I've decided
to post a sample of my work. These pictures are of
a job I just completed for a client.

The client was in the process of modifying a BSA
650cc and didn't realize the offset of the drive
sprockets. I had to come up with a design, and
try to engineer it with durability and function-
ability in mind. Alot more time went into the
design phase than the actual machine time, as it
took 10 hrs from start to finish to produce the
assembly, and over a week to design it. Wish I had
a good CAD package as this was engineered using
Microsoft Paint and a calculator.
The assembly was done by manual machining on my
VN#12, and my SB 113 D.
No CNC, just woman's intuition.
Enjoy the pics.

















I also had the client sign a waver stating that he
was told about the potential dangers, and that he
acknowloges that he is responsible for the safe
operation of the assembly, and that he must afix
the proper safety guards and cautionary lables.

Jamie

Jamie- The machining is nice work. Is this a show bike? Or will it get significant road use? I'm not liking the overhang on the apparent size of the shaft and support plate for the final drive back to the rear wheel. But trust you crunched the numbers. It looks neat.
Is the sprocket material pre-hardened? The photo makes it look like the connecting link clip is in backwards.

The concept and machining are phenomenal looking work and you weren't wasting any time to get it done in 10 hours. Hope it does not come back to bite you.

I used to do a lot of mechanic work on Triumphs, and the occasional BSA or Norton.

smt

Stephan:

Yes it's a "show bike", that the car dealership
down the road is putting together, and I doupt
it will ever be street legal. Yes, I crunched
the numbers pretty good ( that's what took the
longest ), cause I was quite concerned over the
torsional deflection caused by the overhang. The
assembly is also mounted to the adjuster plate
that is not realy visable in the picture. The
shaft extends out the backside of the driver into
the slot in the adjuster plate. Once the driver is
adjusted, it is bolted to lock it in position,
then the main pivot bolt is tightened.
The Drive and Idler shafts are 1045 hardened, and
the Dual sprocket drive hub was made from 4140
chrome-moly annealed, then through hardened and
tempered to give a 56.3 Rc.
As for the clip, you would know better than I,as I
don't have much experience with motorcycles.
Except as a passenger.

Thanks for you comments.

Jamie

Yupp the chain link clip needs to be turn around or it will fall off.
Great craftsmanship, I'm loving it. And all in 10 hrs..... AWESOME! ! !
You should look into some crack versions of solid works or Inventor 3D programs. There are also some good cheap 3D Programs on the market.
You will be able to cut the Engineering time in half.... AT LEAST!

Keep up the great work.
do you have a picture of the whole bike???

Show us more of your work.

The Over hang will be fine if you have alitte collar going into the bracket for support. This is my opinion.

How did you get the profile of the sprocket just right???

Jan
Norway

Trollerudjan;

Thanks for the comments.

I did check around for some software, even "Crack"
but it seems everyone wants you to sign over your
soul.

I talked with the client, and he agreed to send me
some pictures of the bike only when it's finished.
I'll post them then. Some people are very touchy
about their customizing designs getting out. The
Bikeshow must be some type of competition.

The presure & roll-off angles were determined
using the formulas on pages 1079 to 83, in the
19th Ed of Machinery's Handbook. Then after cuting
to the root dia, it was 4 offsets and 4 angles for
each index position. Only had to touchup with the
die grinder after hardening. The standard I used
to check the profile with was a new sprocket I
purchased from the same dealer that I bought the
Idler from.

Jamie