Before I have to have this part recast,(Trying to save on cost of recast)is there anyone out there that might have a pair of these parts laying around some where in your parts statch and would be willing to part with them.
I was finley able to borrow this one. The Arps part number is C107 cast in. but 31-32 parts book listed as SB-! SB-2 and SB-10
Thanks fore your help.
Are you planning to use this part shown as your pattern to create a casting from?
Using an original part for a casting can be done, but it's much easier (and costly unfortunately) to have a split pattern made and use cores so the finish work isn't so time consuming. I've cast things in aluminum that I was told were impossible using an original part. That type of work takes forever because most of the molds that are rammed up are lost due to failure in the sand. It can be done but it's usually a labor of love.
Then there's always the shrinkage problem - the new part will be smaller than the original. That's another reason to have a pattern made by an experience pattern maker.
Sorry Scott I looked at the username instead of your sig.
No problem Craig.
I would be very concerned about the strength of a cast part used in an application like this. The orignal spindles are steel forgings which are many times the strength of a steel casting. Regarding the shrinkage potential, I question whether the irrattic nature of foundry shrinkage would be a concern here because this part has varying section thicknesses that could result in disproportional deformity for a cast part of this size and shape.
I agree with you on general shrinkage (that it might not matter in this particular part due to size), but when there's cores involved for the holes, etc it may mess up their location. If it was cast solid and the holes machined later that wouldn't be a factor.
As for the strength issue, you're absolutely correct and I've only had experience making trinkets and low-strength parts. Someday I'd love to build my iron furnace but at the moment I'm so backed up on projects who knows when that'll happen.
There's a guy on here (named Bob if I remember correctly) who does really nice work in aluminum and probably brass/bronze too but I'm not sure if he's gotten in to steel yet.
I remember reading that when FoMoCo made the T 100 cars, all the parts that had been forged on the original cars (1915) were investment cast on the T 100 cars.
The article also stated that the investment cast parts were as strong as the original parts due to the molecular alignment inherent in investment casting.
As far as cost is concerned, I do not recall them discussing anything about it being prohibitive. But, I don't think cost would have been an issue with Ford. It certainly had to have been cheaper than making all new forging dies.
Just my two centavos worth.
William and Graig
The Ideal way would to have a pattern maker do a new pattern but in checking I find that it is to costly and way beyond my finances to have a pair made. I am going to use this to do the casting and the srinkage is being addresed and will be compinsated for. Yes it is going to be made with a steel casting, The limited use this will see I believe it will be ok. I know very little about casting but have fath in the people that are doing it, I've known them for quiet a while and the other work thay have done for me has worked very well, and there price will fit my budget.
I would prefure to find the orig ones and I know that there out there but haven't been only to find any. This pair is the only ones that I've found in the past 10+ years that I've been looking. Thay will be pluged and mechined after casting.
Thank you for your consern and information.
There was a fellow just north of Grand Rapids that had a Model A snowbird/mail truck. He made those two pieces out of steel plate with a mill. They worked well.
Is NH snocar still around?? They have/had the Model T snow mobile parts
The part shown, having a casting number applied to the pattern, is no doubt a casting, not a forging.
I'll repeat my offer Bob. Want a pattern? I make patterns. There is no charge. Naturally I will have to have your "loaner" long enough to document it dimension wise.