16-01-2019, 11:09 PM
(This post was last modified: 16-01-2019, 11:48 PM by Dennis Nicholas.)
Ref back plate corrosion.
When welding strips in do it in small lengths at a time...first tack in place around then fill in between tacks a little (1/4") at a time alternating from end to end and side to side. The aim is to not heat a local area too much causing distortion.
A small tip I got from a professional welder for filling smallish holes.....clamp a piece of copper plate at the back of the hole then proceed to mig weld deposit a bit at a time building up the edge of the hole till edges join.....the copper will not get welded into place but it prevents the molten metal from forming a lump on the non weld side........only one side to tidy up and grind flush....also copper takes away the heat so less likely to just burn hole at the edge.
Dennis
WRONG WRONG WRONG
Apologies to all it is as T P says the other way round.......Age addled brain and late night strike again.
"A good rule of thumb for most applications is to use a press fit on the rotating component.
That is, a shaft or inner ring rotating application like an electric motor will use a press fit on the shaft and a loose fit on the housing. A housing or outer ring rotating application like a wheel hub will employ the reverse: a loose fit on the shaft and a press fit on the housing. This will greatly reduce the chances of creep or a loosened fit during operation."
Quoted from NTN bearings.
Dennis
When welding strips in do it in small lengths at a time...first tack in place around then fill in between tacks a little (1/4") at a time alternating from end to end and side to side. The aim is to not heat a local area too much causing distortion.
A small tip I got from a professional welder for filling smallish holes.....clamp a piece of copper plate at the back of the hole then proceed to mig weld deposit a bit at a time building up the edge of the hole till edges join.....the copper will not get welded into place but it prevents the molten metal from forming a lump on the non weld side........only one side to tidy up and grind flush....also copper takes away the heat so less likely to just burn hole at the edge.
Dennis
(16-01-2019, 06:33 PM)Dennis Nicholas Wrote: Just a reminder for bearings:- the moving race is usually an easy push fit while the static race is tighter fit......in the case of the hub - outer is moving so easy push fit in hub and felt carrier; whilst inner is static so a harder fit on the axle (also in this case is held by a locking nut.
Dennis
WRONG WRONG WRONG
Apologies to all it is as T P says the other way round.......Age addled brain and late night strike again.
"A good rule of thumb for most applications is to use a press fit on the rotating component.
That is, a shaft or inner ring rotating application like an electric motor will use a press fit on the shaft and a loose fit on the housing. A housing or outer ring rotating application like a wheel hub will employ the reverse: a loose fit on the shaft and a press fit on the housing. This will greatly reduce the chances of creep or a loosened fit during operation."
Quoted from NTN bearings.
Dennis