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carolina
recumbent guru

USA
595 Posts

Posted - 09/25/2017 :  22:09:06  Show Profile  Visit carolina's Homepage  Reply with Quote
I have a excellent welder and machinists/close friends . I can buy correct stem. I have jig fixture. Any help, pics, ideas. I want to build a frt fork 170mm wide for fat 4.5 tyre.

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Edited by - carolina on 10/12/2017 16:44:44

carolina
recumbent guru

USA
595 Posts

Posted - 09/27/2017 :  07:29:55  Show Profile  Visit carolina's Homepage  Reply with Quote
Ordered this piece from ebay:

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Mine will favor this below:

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Edited by - carolina on 10/12/2017 16:43:36
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carolina
recumbent guru

USA
595 Posts

Posted - 09/27/2017 :  07:41:42  Show Profile  Visit carolina's Homepage  Reply with Quote
A view of my stem end of the jig fixture: you can use hardwood plates like in photo instead of aluminum.

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Great technique below for braze-on or adhesive:

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Edited by - carolina on 10/12/2017 16:55:30
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carolina
recumbent guru

USA
595 Posts

Posted - 09/27/2017 :  08:11:13  Show Profile  Visit carolina's Homepage  Reply with Quote
This jig I worked on for months can make many kinds of frames. Thats why i started making a front fork jig fixture that can make different kinds of front forks. Even a stick bike, just slide stuff around.. I started by collecting 8020 stuff on ebay and others for 6 years.

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Edited by - carolina on 10/09/2017 20:02:02
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carolina
recumbent guru

USA
595 Posts

Posted - 09/28/2017 :  13:38:41  Show Profile  Visit carolina's Homepage  Reply with Quote
Found bb: now will get danny to machine station for it.

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Fork kits:

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Brevity and misspelling rampant
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Edited by - carolina on 10/12/2017 16:58:31
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carolina
recumbent guru

USA
595 Posts

Posted - 09/28/2017 :  18:03:10  Show Profile  Visit carolina's Homepage  Reply with Quote
Conversion, this jig fixture 8020 will build lowracers or cargo bikes or fat bike all with fat tires.

Some stations being made at machine shop.

Waiting on four units in mail.

Iam getting better at jigs, they help build theirselves.

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Today i tweeked and moved and improved the way things go together with interchangeable stations. I kept the idea in mind of sliding stuff around for recumbent or regular machines: many hours today will pay me back in the future with all these slider stations. 170mm, 135mm, 2 sets of cones, and adjustable bb station to hold several kinds of aluminum bb tubes. One could weld on this but l do carbon sq tubes and carbon fiber plates of certain thickness and assembly with adhesives.

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I started collecting 8020 and it's accessories over 5 years ago. Don't think u can't have a great fixture on the wall out of the way. Incredible beautiful furniture and conversation. You can start on ebay and order a catalog from 8020 inc.. You can follow the small build of the fork. It all relative. Even the stations can be shared between fork jig or frame jig. Lasers, inclometers, string, etc..
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Edited by - carolina on 10/12/2017 16:45:51
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carolina
recumbent guru

USA
595 Posts

Posted - 09/28/2017 :  22:07:12  Show Profile  Visit carolina's Homepage  Reply with Quote
Jig frame: construction considerations

https://youtu.be/8qrzDCQimT0

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carolina
recumbent guru

USA
595 Posts

Posted - 09/30/2017 :  15:20:25  Show Profile  Visit carolina's Homepage  Reply with Quote
Change up again, more cantilevered stations. Phonelic plate used move stations around or keep em located. I ordered some very affordable linear bearings on 8020.net

Pic shows 2 stations front and rear, the 2 middle stations will push in or out. Both will be on 1 vertical 8020 tube. This fixture will build 4 kinds of bike frames. Couple more weeks of waiting on parts to come and a lil machine work.

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A cheaper way to do a station. I have skewers, machinists, and welder so l make custom ones.

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I like this for the seat post STATION & copied it going down to bb station:

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Edited by - carolina on 10/12/2017 17:00:40
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carolina
recumbent guru

USA
595 Posts

Posted - 10/11/2017 :  18:33:54  Show Profile  Visit carolina's Homepage  Reply with Quote
Still some pieces at machine shop for week or so but i have a view of fork jig fixture:

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Edited by - carolina on 10/12/2017 15:46:11
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carolina
recumbent guru

USA
595 Posts

Posted - 10/15/2017 :  10:39:07  Show Profile  Visit carolina's Homepage  Reply with Quote
To the door ttd, the kit from nova. They have many sizes and kinds of kits. Don’t think u can’t build your own front fork and hub systems you want. I have laced a bunch of rims up and take them to bike shop to true (13.50$). I will put a 90mm sturmey archer front drum brake on next one. This build is a nostalgia build/idea from Alaska back in the beginning of fattires.

Could it be? 2 twenty inch fat tires on lowracer grocery getter. Now i will try to figure out later how to put fat tires on lowracer:) Retired shop life doesn’t get any better.

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LBS mechanic got me interested in buying two rear wheelsets. One in front fork, one at rear. Touring bike. THIS IS 170mm FRONT FORK:

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Would you really wanta invest money in jig fixtures to build your own front forks and frames very straight? Alot of people do. This one is matching stays and front fork widths of 170mm skewers.

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Edited by - carolina on 10/15/2017 10:45:19
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carolina
recumbent guru

USA
595 Posts

Posted - 10/16/2017 :  17:35:50  Show Profile  Visit carolina's Homepage  Reply with Quote
All related to 2 wheel frames and forks:

Wider than store bought which is 150mm. “ 0.79 inches wider = 170mm front axle fork”. Allows me to run rear wheelset at front and rear/a match. Old nostalgia fbike/Alaska.

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Add some simple visual great looks to this fork by machining a 2 & 1/8 inch X 2” steer stem donut base for the inch & 1/8 steer stem. And the same way on next one even if a tappered stem is wanted. Nice, healthy, fat lower stem base. If wanted 5” tire on 20” rim or 26”.
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Edited by - carolina on 10/16/2017 17:38:23
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Speedbiker
human power expert

USA
3761 Posts

Posted - 10/16/2017 :  18:22:20  Show Profile  Reply with Quote
That looks way cool. And thanks for the link to Nova. I've been planning on building a df fatbike, but didn't get around to seeing if they had wiiide bb shells. And there it was! I buy all my bits from Nova.
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carolina
recumbent guru

USA
595 Posts

Posted - 10/17/2017 :  15:49:59  Show Profile  Visit carolina's Homepage  Reply with Quote
Yea, 100mm bb.

Nice fork kits.

Iam machining that extra stem base for looks piece. Frt fork will look nice painted fat at stem base. Rivnuts for front racks.

Remember i snagged that gravity frame on ebay for $44 ttd.

After this one is finished soon, i will make cf frame with same nova steel fork kit.

SB: you might can make it look like this with good welder and after paint and filler:

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Also, i like the mayor frame since l have 2 sq tube cfiber molds, and the mayor has straight tube from neck to rear axle:

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Edited by - carolina on 10/17/2017 16:30:44
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carolina
recumbent guru

USA
595 Posts

Posted - 10/23/2017 :  16:41:41  Show Profile  Visit carolina's Homepage  Reply with Quote
Convert my lowracer to 20” fat tires? Tempting. Great soft ride, better grocery control. W/BAFANG!

Heres my theory on riding lowracer:
Left foot on pedal
Left hand on pavement
Push with left foot and left hand to stable yourself.
Then go and pedal

Edited by - carolina on 10/23/2017 16:53:16
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carolina
recumbent guru

USA
595 Posts

Posted - 10/31/2017 :  16:47:36  Show Profile  Visit carolina's Homepage  Reply with Quote
Same jig i made the lowracer.

$345 back from machine shop today: close to making my frt forks. 170mm

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Station 2 & 3: seat stay/BB

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Head tube: station 1

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Station 4: rear axle/dropouts 170mm

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Edited by - carolina on 10/31/2017 20:07:50
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Speedbiker
human power expert

USA
3761 Posts

Posted - 10/31/2017 :  20:49:41  Show Profile  Reply with Quote
How much of that modular fixturing do you make and how much is premade!
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carolina
recumbent guru

USA
595 Posts

Posted - 10/31/2017 :  22:57:39  Show Profile  Visit carolina's Homepage  Reply with Quote
I made all with stuff from ebay or local shops donate me pieces. Drilled some plates and angles myself and machinists made the rest. I do have the 8020 inc catalog, great for nuts and bolts.

4 unibearings will super slide station 2 & 3 left or right, up or down. BB station is centered at bottom of 8020 tube:
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Need to work on stations 2 & 3.
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Two 20” fat wheelsets/ climb. Metal Backpack panniers Bottle carriers Rivnuts galore!
Fatbike lowracer
Fatbike LWB
Cargo fatbike
Fatbike rigid
Suspension fatbike
Female frame Fatbike
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Edited by - carolina on 11/01/2017 00:21:39
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carolina
recumbent guru

USA
595 Posts

Posted - 11/01/2017 :  18:06:23  Show Profile  Visit carolina's Homepage  Reply with Quote
Finally started looking at my frt fork jig & parts from nova. Had fat steer stem base made. Still need one more station machined in middle but got a start. These things can be very rewarding. The first one, just tig weld and paint. And lil’ heavy but nice learning curve.

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Edited by - carolina on 11/09/2017 17:10:44
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carolina
recumbent guru

USA
595 Posts

Posted - 11/09/2017 :  17:06:22  Show Profile  Visit carolina's Homepage  Reply with Quote
Seat and bb stations 1 & 2 with uni-bearing sliders.

Well, u had tinker toys and legos too! In my second childhood now, iam haveing a wonderful time, eventually l will figure it out. Trying to dabble in a 2 station slider with these plastic uni-bearings from 8020inc. Been collecting 4 years now.

The front fork 8020 jig fixture has no unibearing sliders and should have it welded together within a week:

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Showing this strong stay with different thru axle: a bearing in the black aluminum plate.

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Edited by - carolina on 11/09/2017 17:21:00
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carolina
recumbent guru

USA
595 Posts

Posted - 12/08/2017 :  15:06:07  Show Profile  Visit carolina's Homepage  Reply with Quote
Front fork jig fixture is finished. Now trim & fit fork parts and weld.


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