Mercuriell
03-16-2008, 07:40 AM
After a couple of smacks I had ruined a couple of one ways - they don't seem to like being graunched onto the shaft - anyway $40 for a new hub (http://www.espritmodel.com/index.asp?PageAction=VIEWPROD&ProdID=6238)seemed a bit steep so I wondered how difficult it would be to change it. Made up a mandrel from an old TREX600 shaft and hub sleeve - the mast is cut down around the step to leave 10mm of the 9mm diameter and 15mm of the 10mm diameter shaft. The TREX hub sleeve is threaded over the mast which is inserted into the bearing assembly allowing the 11.5mm diameter sleeve to push the whole lot out.
The one way bearing in the hub is an HF1012 (http://www.vxb.com/page/bearings/PROD/10mm/Kit7645) (14mm OD x 10mm ID) which is worth about $10. I used a G clamp without heat to extract the bearing and the two brass spacers - came out pretty easy. A brass spacer can be used to guide the loaded new bearing and 2nd spacer assembly (left in deep frreeeze for 30mins) into the hub which I heated to 200°F and went in real easy - used a vice to square up the two spacers and bearing - voila - new hub assembly for $10 - if anyone's interested I'll post a video.
The one way bearing in the hub is an HF1012 (http://www.vxb.com/page/bearings/PROD/10mm/Kit7645) (14mm OD x 10mm ID) which is worth about $10. I used a G clamp without heat to extract the bearing and the two brass spacers - came out pretty easy. A brass spacer can be used to guide the loaded new bearing and 2nd spacer assembly (left in deep frreeeze for 30mins) into the hub which I heated to 200°F and went in real easy - used a vice to square up the two spacers and bearing - voila - new hub assembly for $10 - if anyone's interested I'll post a video.