Hello Annalise,

Do you really need to replace it? These switches are generally quite robust and when they begin to develop faults it is usually a case of spark erosion on the points, oxidising the contacts . I suggest you do little more at this stage than get a piece of fine emery cloth or paper, doubled over to have abrasive faces both sides and slide it between the contacts. Now work it about to polish the faces, clean the area to remove loose abrasive and that should be sufficient.

If the closing springs have failed, rob the new switch and rebuild the motor. It might surprise you! Generally a good clean up in the area is also to be recommended and a drop of oil on the bearings would be worthwhile while you have the motor open.

Kind regards Brian

As Brian has said try cleaning the contacts with 320 or 400 wet or dry paper folded double in a 1/2" strip. I take it the bit you cannot get off is the pulley ? Very careful use of a gear puller may work. When fitting the centrifugal switch the position of the various parts is critical to it's proper operation = if the start windings stay on for too long then they will soon burn out. Good Luck Noel.

Perhaps a picture of the new switch to compare would help us here

Brian

Any chance that the new switch could be dismantled and re assembled onto the existing arms?

o e. make a working switch out of nthe parts available?

Howard

Looks to be a good set of winding, all is not lost, as if you bring out the pair of wires which went to the centrifugal switch, you could use a freezer relay or even a toggle switch. The toggle switch would be manually operated in conjunction with the normal mains switch. When motor were not so plentiful as today it was amazing what people did to power workshop machines. john

What has actually broken ? The wings on the centre look good. If the anchor for the springs has failed then drilling and tapping the centre and making a new fixing may work. Bear in mind that there are 2 common motor speeds and therefore 2 switches, 2 pole and 4pole. See my earlier comment on positioning and correct operation as this could easily cook the windings if wrong. Newman were good motors it would be a shame to see it burnout for the sake of the start switch. If you know what your doing then Johns idea will work though a push button is safer,It may be cap start so the whole start circuit must be switched, you only need the start windings for less than a second in most cases. Noel.