Tools for layshaft needle bearing

The problem with removing this needle bearing is that it´s a blind hole ( one way ).
I will soon have some drawings for these tools. ( I hope)

If you don´t have these tools you can use the "Hydralic method" .
Fill the hole with Heavy grease and tapping a suitable sized in to it
and see if the bearing shell will ''hydaulic'' its way out.

Remove as many rollers as possible with a punch then run a bead of weld
inside the shell. As the weld shrinks the bearing should fall out.

Turn a piece of stock the same size as the layshaft about 5 inches long then
insert it into the bearing then tig weld it to the bearing and while it is still
warm from welding you can pull it out with the stock you just welded in.

All these ideas is taken from the "BSA B50 Forum"

First the rollers are removed from the bearing, the
oval shouldered nut is then placed at a angle to enter
the outer case of the bearing, in the case or the kick
start quadrant a closed sleeve ( a suitable socket could be used )
, in the case of the other bearing the flat bar is used, in both
cases the long bolt with the nut is then threaded through the
respective hole and engaged in the oval nut.

The head of the bolt is "held " while the nut is then rotated
clockwise, to extrude the bearing.
With a little more imagination the tool could be modified to
install the bearings, by a suitable collar to interface with the
bearing and fastening the flat bar to the crankcase and placing the
nut on the inner side of the bar this is then "held " and the head
of the long bolt is then rotated clockwise to press the bearing in
position, this is a little more bearing friendly than a drift and hammer.

The "hydraulic" method is the easy one for most, and above can be made
with a file and imagination for those who not have access to a tig welder
or a small grinder, so either way sales of this bearing world wide
have just been increased.

Best Regards John

Updated 14:35 2004-02-09
© Rickard Nebrér