Cranbrook Springer Forked BTR YD100 Replica Build (without fabrication)

[curtisfox]

Do you have a steel supply near you, they usually have benders......Curt

 

[Tom from Rubicon]

'And I appreciate the info. I think leverage will be the key for sure. The 1” tube I cut off is roughy .077” thick. I’m guessing I can find something comparable at Home Depot."
Not.
Curt and Steve can correct me, but bicycle tubing is generally 4130 chromoly. As in aircraft frame tubing.
Home Depot it ain't.
Steel – the different types of steel in bike frames – gravelcycling (wordpress.com)

Steve, gave you a good tip if you are unfamiliar with shaping steel tubing. Packing sand in the tubing and trapping it causes the out side of the bend to stretch while minimizing crush and collapse of the inner bend.
I don't know what your day job is. It takes a particular skill set to safely fabricate a bike frame. I Don't.
Consider your Night Rider, every frame joint is lugged and brazed. The tubing is chromoly steel. Just trying to keep you from breaking your neck Danny, if the Sporty doesn't first.
Regards,
Tom

 

[Tom from Rubicon]

Sure looks like it his frames are all brazed .......Curt

They are Curt. Lugged and brazed.
Tom

 

[Nightster]

Sure looks like it his frames are all brazed .......Curt

wow did not notice that

 

[Nightster]

Do you have a steel supply near you, they usually have benders......Curt

Hmm that is a possibility. I need make sure of my angle but I bet they could knock that out in a couple mins or less

 

[Nightster]

'And I appreciate the info. I think leverage will be the key for sure. The 1” tube I cut off is roughy .077” thick. I’m guessing I can find something comparable at Home Depot."
Not.
Curt and Steve can correct me, but bicycle tubing is generally 4130 chromoly. As in aircraft frame tubing.
Home Depot it ain't.
Steel – the different types of steel in bike frames – gravelcycling (wordpress.com)

Steve, gave you a good tip if you are unfamiliar with shaping steel tubing. Packing sand in the tubing and trapping it causes the out side of the bend to stretch while minimizing crush and collapse of the inner bend.
I don't know what your day job is. It takes a particular skill set to safely fabricate a bike frame. I Don't.
Consider your Night Rider, every frame joint is lugged and brazed. The tubing is chromoly steel. Just trying to keep you from breaking your neck Danny, if the Sporty doesn't first.
Regards,
Tom

right the sportster is more of a worry, but point taken. Where can I find chromoly steel? There is a pipe place not far away, I will call them when I get a chance. Otherwise there’s a place about 45 minutes away I’m sure would probably have it.

thanks tom

 

[Tom from Rubicon]

Remember Co Bappe's bike Vekst frame fabrication method? He drew a paper template to gage everything from.
Then again the Edison way works too.
Tom

 

[Tom from Rubicon]

Here ya go Bud, one source shopping.
tubing | McMaster-Carr

 

[Tom from Rubicon]

Sorry Danny, type 4130 in search

 

[Nightster]

Remember Co Bappe's bike Vekst frame fabrication method? He drew a paper template to gage everything from.
Then again the Edison way works too.
Tom

will look into that

thanks again

 

[Nightster]

Sorry Danny, type 4130 in search

checking soon thanks

 

[Nightster]

Sorry Danny, type 4130 in search

would you go with the .065 thickness or the .083?

 

[Tom from Rubicon]

Me? .083" Welding thin steel is a pain. Until you get your amps set right. Curt can counter me. My experience as a welder is quite limited. I repaired a lawn mower deck break with a flux core 110V.
At work using a gas shielded MIG is a total different cat. Practice a lot. blow outs in thin steel is common.
Tom

 

[Nightster]

Me? .083" Welding thin steel is a pain. Until you get your amps set right. Curt can counter me. My experience as a welder is quite limited. I repaired a lawn mower deck break with a flux core 110V.
At work using a gas shielded MIG is a total different cat. Practice a lot. blow outs in thin steel is common.
Tom

Yeah, I plan on doing some practicing with some extra that I buy.

thanks again

 

[curtisfox]

Don't think all is molly tube just the better frames, so many cheep ones on the market now.........Curt

 

[dogcatcher]

Set back seat post. Need a Good Seatpost With At Least 40mm of Setback... | Road Bike, Cycling Forums (roadbikereview.com)

Bend? Check with a local muffler shop. If it is thin enough an electrical conduit bender might work.

 

[Tom from Rubicon]

I yield to Curt again. google: Schwinn bike metallurgy specifications. good luck. Since Schwinn left Chicago.....
Now, all of the above being equal. 1018 DOM tubing.

Speedy Metals - Steel Round Tube
Choose your favorite wall thickness and OD.
I have used Speedy Metals for 30+ years. I have a local kinda center that I can drive to to save shipping.
Tom

 

[Nightster]

Thanks to all, reading and researching all the links

 

[curtisfox]

Check this out.................Curt

My latest project

I’ve had this girls bike around for years. It was my older sisters, she got it new for Christmas in 1959, but she didn’t want it any more and told me to scrap it. I have better ideas for it ! I have a little China girl 2 stroke that I wasn’t using so I decided to build another board tracker...

motorbicycling.com

 

[Nightster]

Check this out.................Curt

My latest project

I’ve had this girls bike around for years. It was my older sisters, she got it new for Christmas in 1959, but she didn’t want it any more and told me to scrap it. I have better ideas for it ! I have a little China girl 2 stroke that I wasn’t using so I decided to build another board tracker...

motorbicycling.com

Thanks man, following that for sure