Sash window pulley with ball bearings

[Possom]

The big sash window component companies supply replacement sash window pullies which have ball bearings in them.

Does having the ball bearings in the pulley make a discernible difference to ease of sash slide compared to a standard 1930s pulley with no ball bearings?

 

[Crystalclear]

After time, wouldn't you get the 'sqweeeeeek' as you worked it open or close, with no bearings in the pulley?

Dust and time have it's affects, I guess.

 

[Crystalclear]

Alfred Hitchcock's Rear Window wouldn't be the same with a squeaky window

 

[Possom]

After time, wouldn't you get the 'sqweeeeeek' as you worked it open or close, with no bearings in the pulley?

Dust and time have it's affects, I guess.

There's no discernible squeak from my 1930s pullies. If there was, I'm sure this could easily be sorted with a squirt of WD40.