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Could somone please post a picture of a original 7 leaf spring. I need to see how thick the ends are and how much they turn upward. Thank you in advance.
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Picture of a 7 leaf spring
John,
Based on my experience, the quality of end treatment changed noticeably over the years, maybe from supplier to supplier. Most original mid-year springs typically appeaer more uniform and more carefully made. On the other hand, I've seen one or two springs from the late 70's that are downright ugly in terms of the end treatment, with non-square end cuts and nothing that approached careful workmanship of the tapered end. So, I think you may get a different sense of things if you look at a nice orignal spring from the 60's vs. an ugly one from the late 70's.
Gary -
Re: Picture of a 66 or 67 - 7 leaf spring
Gary -- thanks for the response. Good Point on the spring. I am looking for a picture of a 7 leaf spring either from a 66 or 67 car.Comment
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Picture of a 66 or 67 - 7 leaf spring
John,
There was a combined total of slightly less than 5,000 cars made in '66 and '67 with the HD spring, so someone should be able to get you a close-up of an original 7-leaf.
GaryComment
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Re: Picture of a 66 or 67 - 7 leaf spring
I have the original leaf spring still in my 1966 coupe I'll snap a pic of it tonight when I get home and post if one isn't shown already.Comment
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Re: Picture of a 66 or 67 - 7 leaf spring
Thank youComment
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7 Leaf Spg "From the Suppliers Perspective"
The heavy duty spring released for the 63 and subsequent model years was part number 3828811 located on GM spring chart drawing number 3827453 dated 2-24-62. The leaf end configuration consisted of the following sections:
# Code ThkLgth Taper
1 BK .262 48.60 No Taper
2 BL .262 41.86 3.28
3 BM .262 35.62 3.28
4 BN .262 29.24 3.28
5 BP .262 23.00 3.28
6 BR .262 16.62 2.78
7 BS .262 11.36 2.82
Key manufacturing operations:
1. Material cut to proper leaf lengths
2. Leaf ends were "snub" rolled to developed tip thickness.
3. Tip thickness varied by TIP (Taper per inch) and ranged from .060 to .125.
4. During the snub rolling operation the leaf width increased in width and was trimmed to 2.13 and depending on the supplier of record: a. trimmed square 2. rolled out condition and side trimmed.
5. Each leaf end was then formed with the appropriate "up turned" ends. .62" from the leaf end then formed up to .25" +.06-.00. The purpose for this operation was to eliminate the possibility of "galling" the secondary or supporting leaves and to minimum inner leaf friction. At design load the spring was in a negative camber condition by 0.290".
Please email me offline and I'll send you a copy of the pertinent portion of the drawing related to the leaf end configuration.
Hope this this information is helpful.Comment
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