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Hi,
My first posting on this forum.
I live in Japan and I’m Japanese (I’m not good at English. My posting may be contained incorrect English…).
I have 1997 Homegrown Factory. The frame was painted black and replace all compornent & front fork last year. I use this bike on XC race now.
Hi,
My first posting on this forum.
I live in Japan and I’m Japanese (I’m not good at English. My posting may be contained incorrect English…).
I have 1997 Homegrown Factory. The frame was painted black and replace all compornent & front fork last year. I use this bike on XC race now.I want to use disk brake for mad condition track or race on rainy day, and I’m making rear disk brake mount from April.
The followings are “Making of Rear Brake Caliper Mount”.Step 1:
I made “caliper mount’s positioning spacer” from alminium block.
The thickness must be 15mm, because the distance from disk rotor side of hub to brake cariper mount side of frame is 15.01mm. I referred HAYES’s document (http://www.hayesdiscbrake.com/wp-content/uploads/2010/04/98-17886_6inch.pdf).This spacer was milled by mini lathe machine. The positions of holes are for mounting caliper and disk rotor.
This spacer was checked on other MTB frame. This spacer will be used when welding.
My lathe machine is “SIEG C1”. This lathe is very small and reasonable(made in china), but it is very useful and powerful machine.
Step 2
Milling brake caliper mount plate. The material is A6061-T6.
Step 3
Checking shape of caliper mount plate in using Homegrown frame.
It is very good shape!
Hi, Shoichi!
Beautiful bike do you have there! I like the the black and gold color sceme!
Thanks for sharing! Will you offer the adaptor to the community?
Hi, oldschool559
Thank you for your comment.
The photos to Step3 was taken last month. I will post other photos this night. My Homegrown’s rear section, the adaptor and positioning spacer ware already sent to welding worker 3 days ago. The date of completion seems to be after 1 week. I will post the photos of completion this topic.
The number of set of adaptors that I can make is from 2 to 3 perhaps. I cannot make a lot of adaptors. Because I am an amateur about metalworking and many days are necessary to make. I can work for making adaptor only for 2 to 4 hours on Sunday or Saturday. It may be necessary to shape by rasp slightly because the adaptor plate has a small error margin by hand working. I cannot warrant the precision of the plate and compatibility of other model.
If you need the set of adaptor(adaptor plate. reinforcement-pipe of dropend(I dont post this photo yet), positioning spacer of adaptor and bolts), and you can wait for 1month to 1.5month, the sending of the adaptor will be possible. I think that the total of adaptor-set is 20USD (this price is only material and very little working-fee!). And EMS fee is 1200JPY (about 15USD). The amount is 35USD. I can receive payment via Paypal.
You must prepare blank-rear-hub for holding adaptor plate and positioning spacer when welding (And you must know good aluminium welding worker).
Thank you!
It is a last step of making parts for disk mount plate.
Step 5:
It is necessary to check shape and the size of each parts on actual Homegrown frame before sending to welding worker.
The surface of shoulder of dropout of Homegrown frame(the face of welding adaptor plate) is not straight line. I shaped the shoulder of dropout a little by rasp.
3 days ago, I sent adaptor-plate, reinforcement-pipe and positioning spacer to good welding worker. The this side of mount plate is welded with the screw detained on positioning spacer. Next, other side of the plate is welded after removing positioning spacer.
The sentence of my postings might be queer or funny, because I am not good at English.
Please point it out if there is a part that cannot be understood.Thanks!
Hi,
Now, 21:30 at Japan.
Step4:
Step4 is the making of very important parts. In case of non-suitable Disk brake frame, the dropout and the joint of dropout & frame-pipe are not strong. The joint of dropout & frame-pipe must be reinforced. I made short pipe from rod of A6061-T6 by lathe. This step was most difficult working.
If this reinforcement pipe doesn’t exist, the crack will be caused on the welding part of joint of dropend and frame-pipe by innumerable braking.
Your English is very good; there’s no need to apologize. This is a very neat project that you’ve started-thanks very much for sharing the detailed info and pictures.
Cheers,
John
Hi!
Thank you for your comment. I am relieved about my English.
15 years ago, I lived in Portland for business for a year, but I do not use English so much since then.My Homegrown returned back from welder.
Before welding, The welder said “It is a little difficut to weld, because the edge of dropout-plate may melt by heat of the welding”. Giving priority to strength and accuracy, the welding work seems to have been done carefully.
After welding, I polished the swing-arm.
I’m waiting for the arrival of disc brake set.
Hi!
My Homegrown was completed last month.
I bought a new-HOPE’s disc brake set, but The fluid leaked from piston. I waited for its exchange for a month.
And changed fork, wheels, tires, stem….
This is beautiful. Great craftsmanship, great style, great dedication.
Now we need a photo of you getting some Japanese dirt on this awesome bike!
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