New Shaft Material
New Shaft Material
(OP)
Hi
We currently make some Conveyor shafts 600mm long 25 dia in 304 St/St . The Shafts rotate back and forth & are held either end in a bearing and the load is applied in the center of shaft .
At presnt the shafts fail in the center by cracking in half .
We are looking to use a tougher grade of stainless that can cope better with the conditions mentioned . Can anyone recommend a suitable grade ?
Best regards
Chris
We currently make some Conveyor shafts 600mm long 25 dia in 304 St/St . The Shafts rotate back and forth & are held either end in a bearing and the load is applied in the center of shaft .
At presnt the shafts fail in the center by cracking in half .
We are looking to use a tougher grade of stainless that can cope better with the conditions mentioned . Can anyone recommend a suitable grade ?
Best regards
Chris





RE: New Shaft Material
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"It's better to die standing than live your whole life on the knees" by Peter Mayle in his book A Good Year
RE: New Shaft Material
On any shafting make sure you don't have any notches in the shaft. it needs to be smooth from bearing to bearing.
RE: New Shaft Material
_____________________________________
"It's better to die standing than live your whole life on the knees" by Peter Mayle in his book A Good Year
RE: New Shaft Material
Can you get cold drawn/worked 304 (or 316 with higher cold work coefficient) ?
Can you get your shafts shot peened (cold worked surface)?
Or, as noted, various other alloys, some with a sacrifice of corrosion resistance.
RE: New Shaft Material
If you go higher strength you might want to go to custom cold drawn tubing to reduce the amount of material. At higher strength you could use less cross section.
1. Cold drawn 304
2. Cold drawn Nitronic (219 is a good one)
3. annealed duplex stainless, good strength and toughness
4. PH stainless, 17-7, 17-4, 15-5, make sure NOT to use the highest strength condition. For good toughness use 1000 or 1050 aging.
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