|
Post by diydave on Feb 27, 2024 19:51:28 GMT -6
Remember that albatross aerator I bought the other day? I'd like to replace the solid tines that are on it. Took 2 bent ones off'n it today to measure, and they come up as 8mm diameter X 5" long. I'd kinda like to know what kind of steel they are made of... I took the bent tines to a hammer and a makeshift anvil, beat them almost perfect straight cold, hammer didn't seem to dent them much, and they had a good springiness to them, took some good whacks with the medium sized ball peen hammer I had handy. Cold rolled, hot rolled, drill rod? They do take a pretty good beating, goin down into the unknown and variable (sometimes rocky) soil, and I don't want something that will shatter...
|
|
|
Post by billinohio on Feb 27, 2024 20:14:39 GMT -6
Very likely 4140 . Finding metric size may be a problem. It can be drilled or machined easily and then heat treated about as hard as you would want. Most of the wrenches and sockets were made of 4140 when I worked at Mac tools. You can buy the steel in a somewhat hardened condition, but it might be hard to work with, if it needs any machining. It is not terribly expensive.
|
|
|
Post by haywood on Feb 27, 2024 20:15:21 GMT -6
|
|
|
Post by Erstwhile on Feb 27, 2024 20:56:40 GMT -6
High grade Rebar?
|
|
|
Post by diydave on Feb 27, 2024 21:05:23 GMT -6
I can get the tines from R&R, but for as simple as they are, a straight piece of metal, 8 mm dia X 5" long, was hoping to find a local source, just buy a length of rod, cut it as needed, and bolt on with a set screw. Did some looking around, grade of steel changes price, so it may be cheapest to get it from R&R, $9.00/tooth X 12 teeth.
|
|
|
Post by diydave on Feb 27, 2024 21:07:46 GMT -6
Very likely 4140 . Finding metric size may be a problem. It can be drilled or machined easily and then heat treated about as hard as you would want. Most of the wrenches and sockets were made of 4140 when I worked at Mac tools. You can buy the steel in a somewhat hardened condition, but it might be hard to work with, if it needs any machining. It is not terribly expensive. For 12 teeth, I might just get the ready made teeth. While I understand the process of heat treating, getting it right may b e trial and error...
|
|
|
Post by spmn on Feb 27, 2024 23:16:13 GMT -6
|
|
|
Post by billinohio on Feb 28, 2024 0:30:15 GMT -6
My go-to place in Cincinnati would likely charge more than that just to harden those teeth. They would hardness test your old part and then make the new ones close to that hardness. I built a “harrow”, for lack of a better term, for scarring up the horse race track. It uses 99 teeth, made out of 5/8 round 4140. One time they hardened a batch for $75, the next time it was $175. The steel went up inprice, too. The last time, they got “smart” and ordered the pre-hardened steel from some place way outa state, cut to length and shipped in. I guess they thought I was making too much money, when actually I was just about losing money, with 2 trips to town. As I remember, we were hardening to 45 R and the pre-hardened stuff was softer than that, much softer. I would bet they bent their double priced teeth!.
So much for the change in supervisors down there!
|
|