7 replies to this topic

[DeadSquare]

I was chatting with a chap on Easter Monday, trying to dissuade him from fitting Straight cut Drop Gears. 

 

At one point in the conversation, he was clearly of the opinion that the Idler Gear, shaft, is a press fit.

 

It would save a lot of machining, so just out of interest, this afternoon I set one up in a substantial Vice and squeezed, but no sign of movement.

 

Does anyone know if the shaft is integral or pressed in ?

[imack]

The straight cut roller bearing idler gear have a press fit "dead" shaft.

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Edited by imack, 01 May 2025 - 04:56 PM.

[Spider]

Yes, the shafts in the standard gear are pressed in, but good luck ever pressing one out !

[OzOAP]

Could be the angle of the pic but look at the gear mesh.
The mesh between the idler and input gear is obviously determined by the gearbox casing, so that is the distance the gear manufacturer works with.
Now look at the primary/idler mesh.
I use different thickness sump gaskets, or even non at all, to set mesh the same between primary/idler and idler/input.

Edited by OzOAP, 01 May 2025 - 07:01 PM.

[DeadSquare]

Could be the angle of the pic but look at the gear mesh.
The mesh between the idler and input gear is obviously determined by the gearbox casing, so that is the distance the gear manufacturer works with.
Now look at the primary/idler mesh.
I use different thickness sump gaskets, or even non at all, to set mesh the same between primary/idler and idler/input.

No, that's not the angle of the picture.

 

Self respect wouldn't have let that Primary Gear leave my machine shop.

[DeadSquare]

Yes, the shafts in the standard gear are pressed in, but good luck ever pressing one out !

Thank you Spider.

[DeadSquare]

 

Yes, the shafts in the standard gear are pressed in, but good luck ever pressing one out !

Thank you Spider.

 

A 30 ton hydraulic press hasn't moved it.

[Spider]

 

 

Yes, the shafts in the standard gear are pressed in, but good luck ever pressing one out !

Thank you Spider.

 

A 30 ton hydraulic press hasn't moved it.

 

 

That was where I got to !

When I machine them out for the Tapered Roller Conversion, it's clear it is a separate shaft.