Drill or reamer spacers

[silversid]

I need to make a pair of spacers out of mild steel, 38mm long, 35 dia, with a 20mm hole for a wheel spindle.

My question is, is it best to drill out using a 20mm drill bit or drill slightly smaller then ream it to 20mm.

 

[Drains]

If they're spacers sid, and they're not supporting the spindle, then drill would be fine, surely. If it's vital that there is no play, then reamer. Although a well sharpened drill should be pretty accurate.

Wheelbarrow?

 

[silversid]

I Should have said, that they are for supporting a wheel spindle and good fit with no play.

 

[Paul.]

You could probably use a shaft collar, available from most engineers supplies or bearing stockists, like this http://www.ruland.com/ps_collars_setscrew.asp

 

[dazzis]

i assume its for a bike of some description ,if so use ali look much neater in a few years, drill will be fine hth

 

[MrFluffy]

A drill will be accurate enough, the idea is with a spindle is the spacers and bearings form a pack, and when you tighten it all up it all clamps together.
The spacer tube between the bearings is to stop the side forces crushing them and stopping this happening.

If eliminating all of the play was a function of the holes, you would need a small press to take the spindle out...

If the spacer forms a bearing (swingarm bush for eg) or sits inside another bearing, then the tolerance for that diameter will be tighter. You'd then want to drill say 0.5mm undersize and ream to final finish.

 

[silversid]

A drill will be accurate enough, the idea is with a spindle is the spacers and bearings form a pack, and when you tighten it all up it all clamps together.
The spacer tube between the bearings is to stop the side forces crushing them and stopping this happening.

If eliminating all of the play was a function of the holes, you would need a small press to take the spindle out...

If the spacer forms a bearing (swingarm bush for eg) or sits inside another bearing, then the tolerance for that diameter will be tighter. You'd then want to drill say 0.5mm undersize and ream to final finish.

Thanks for that, I will just drill them out, the spacers are then going to be welded to a swing arm, so I might have to run a reamer down after welding.

 

[snowcat]

Thanks for that, I will just drill them out, the spacers are then going to be welded to a swing arm, so I might have to run a reamer down after welding.

Just drill them out undersize if your welding to them then put the final hole through them after weding. they will H/D, and dont forget to use material that does not workharden