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D2 Front Idlers

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2 months 3 days ago #239674 by trainzkid88
Replied by trainzkid88 on topic D2 Front Idlers
all sintered means its impregnated with oil or graphite. ally would be too soft but some aluminium bronze alloys are so tough they have to be forged rather than turned although modern ceramic and carbide tooling has probably changed that.
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2 months 2 days ago #239680 by PhilC
Replied by PhilC on topic D2 Front Idlers

all sintered means its impregnated with oil or graphite. ally would be too soft but some aluminium bronze alloys are so tough they have to be forged rather than turned although modern ceramic and carbide tooling has probably changed that.
 

That's not what sintered means at all. It is how the billet is formed. Nothing to do with oil or graphite.
As per Science Direct "Sintering is a thermal process of converting loose fine particles into a solid coherent mass by heat and/or pressure without fully melting the particles to the point of melting"

A lot of air service units and air exhaust silencers use sintered bronze and it looks like small balls squashed together. I would use side-seat's advice as he has done the job many times instead of listening to an arm chair expert who has never done the job themself.

944A - Machine SN 43A2589 Engine SN 90A284
955K- Machine SN 71J3772 Engine SN 83Z0704
D6 SN's 4R732sp, 5R2724, 5R4832
D8 SN's 15A1254, 15A2287, 15A2723
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2 months 19 hours ago #239737 by trainzkid88
Replied by trainzkid88 on topic D2 Front Idlers
ive worked with sintered bronze bushings and no it isnt like that. yes it is powder formed.my reasoning for using a sintered bush is it needs less lube, grease and oil attract dirt, dirt and lube makes grinding paste. its track gear it works in dirt. yes today's materials weren't available then. doing it as original will work just fine too.
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5 days 5 hours ago #240945 by bpusmc
Replied by bpusmc on topic D2 Front Idlers
I got some C93200 (SAE660) Bearing Bronze and some 4142HT bar and I’m ready to go to my machinist. Can anyone provide a drawing or dimensions for the idlers and bushings? My machinist would prefer not to work from the worn out samples I provided him.
Thx,
Chad

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