6061 J56 Brackets
Thread Starter
7th Gear
Joined: Jan 2018
Posts: 7
Likes: 0
6061 J56 Brackets
Hello everyone,
Earlier this year I machined a set of J-56 brackets for a friend's '77 track build. I've picked up the project again as a way to improve my CNC skills and perfect the part. I am looking for someone from the community to provide design and machining feedback, ideally by fitting the part up to their car. I am located in Southern California, a bit north of LA and would prefer to work with someone locally but am willing to ship the part to you (I currently have a right hand prototype). I have attached pictures of my latest prototype which still needs refinement in some areas; primarily in terms of surface finish. If you're willing to collaborate on this part, I'm more than willing to machine a set for you in return for your feedback. Thank you for your consideration. I have attached pictures of my latest part as well as a shot of the left hand fitted to my friend's '77.
Thanks in advance for your help!
Earlier this year I machined a set of J-56 brackets for a friend's '77 track build. I've picked up the project again as a way to improve my CNC skills and perfect the part. I am looking for someone from the community to provide design and machining feedback, ideally by fitting the part up to their car. I am located in Southern California, a bit north of LA and would prefer to work with someone locally but am willing to ship the part to you (I currently have a right hand prototype). I have attached pictures of my latest prototype which still needs refinement in some areas; primarily in terms of surface finish. If you're willing to collaborate on this part, I'm more than willing to machine a set for you in return for your feedback. Thank you for your consideration. I have attached pictures of my latest part as well as a shot of the left hand fitted to my friend's '77.
Thanks in advance for your help!
Race Director
Joined: Mar 2003
Posts: 11,608
Likes: 780
From: Eustis ( Area 51 Bat Cave ) Fl
I have j56 front calipers on my 69 and while in in eustis florida and dont know how much i could help i do have interest in your item,
I would rather talk private,
Your pms are off so
The13bats@aol.com
407 496 8334 anytime and text is fine
I would rather talk private,
Your pms are off so
The13bats@aol.com
407 496 8334 anytime and text is fine
Drifting
Joined: Mar 2013
Posts: 1,926
Likes: 304
From: Lansing MI
Last edited by chazde3; Jan 16, 2018 at 09:56 AM.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Every 2027 Corvette Engine Explained
Joe Kucinski
Designer Imagines A Corvette That Looks More Like a Corvette Than the Corvette
Verdad Gallardo
10 Ugly Corvettes That We Still Kinda Love
Joe Kucinski
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Racer
Joined: Jan 2004
Posts: 303
Likes: 28
From: los angeles ca
While the OP did not state the heat treat number most aluminum bar stock comes heat treated.
The most widely available is 6061 T6 or a variant of T6....
If it was not heat treated it would have been very apparent when it was machined.
The most widely available is 6061 T6 or a variant of T6....
If it was not heat treated it would have been very apparent when it was machined.
Drifting
Joined: Mar 2013
Posts: 1,926
Likes: 304
From: Lansing MI
Says right in the title that it's made of 6061. 6061 would probably be fine for this application, but I'd personally go with 7075 if I were making them.
Drifting
Joined: Mar 2013
Posts: 1,926
Likes: 304
From: Lansing MI
Thread Starter
7th Gear
Joined: Jan 2018
Posts: 7
Likes: 0
Hi everyone,
I appreciate all the feedback! For those of you who requested PMs, I can't currently send PMs. I'm not sure if its related to me being a brand new member or not, I wasn't able to find anything in the FAQs. I have a message out to the Admins. As soon as I can send PMs I will.
[QUOTE=TCracingCA;1596391592]I have three sets- small spindle early, and large spindle late both real. And the third is a small spindle aluminum reproduction! So which ones are you producing!
To be totally honest, I am not sure exactly surer about the specific fitment issue you mentioned. We collaborated on the 3D model which he developed from pictures of original brackets. It fits my friend's '77 which has a Wilwood brake kit but it should also fit the stock caliper with the possibility of having to adjust the bolt lengths.
This was an oversight on my part which I should have mentioned in my original post, the material is 6061-T6.
I am planning on sticking with 6061-T6 for the moment and am actively looking at anodizing options. I am open to looking at 7075 or even steel if someone specifically requests it.
Thanks again for the feedback!
I appreciate all the feedback! For those of you who requested PMs, I can't currently send PMs. I'm not sure if its related to me being a brand new member or not, I wasn't able to find anything in the FAQs. I have a message out to the Admins. As soon as I can send PMs I will.
[QUOTE=TCracingCA;1596391592]I have three sets- small spindle early, and large spindle late both real. And the third is a small spindle aluminum reproduction! So which ones are you producing!
To be totally honest, I am not sure exactly surer about the specific fitment issue you mentioned. We collaborated on the 3D model which he developed from pictures of original brackets. It fits my friend's '77 which has a Wilwood brake kit but it should also fit the stock caliper with the possibility of having to adjust the bolt lengths.
Thanks again for the feedback!
Thread Starter
7th Gear
Joined: Jan 2018
Posts: 7
Likes: 0
Actually I would appreciate it if you took a look at this drawing. I'm primarily concerned about the hole sizes and spacing compared to the original part. Based on what I saw the last time I fit one up, I think I should go tighter on the holes but I'm not sure what the hole sizes are on an original part.
Thanks!
Race Director
Joined: Aug 1999
Posts: 18,126
Likes: 174
From: WI
Actually I would appreciate it if you took a look at this drawing. I'm primarily concerned about the hole sizes and spacing compared to the original part. Based on what I saw the last time I fit one up, I think I should go tighter on the holes but I'm not sure what the hole sizes are on an original part.
Thanks!
Thanks!
not the only difference but the major difference between 65-67 and 68-82 is the size of the two spindle bolts 65-67 takes a 7/16 bolt, 68+up 1/2 bolt
Drifting
Joined: Mar 2013
Posts: 1,926
Likes: 304
From: Lansing MI
Actually I would appreciate it if you took a look at this drawing. I'm primarily concerned about the hole sizes and spacing compared to the original part. Based on what I saw the last time I fit one up, I think I should go tighter on the holes but I'm not sure what the hole sizes are on an original part.
Thanks!
Thanks!
I would drop the .55 holes to .531, that's the standard clearance hole for a 1/2" bolt at my company.
Last edited by chazde3; Jan 17, 2018 at 01:59 PM.
Thread Starter
7th Gear
Joined: Jan 2018
Posts: 7
Likes: 0