extention pics

[deadeye]

yep it don't take long.  i knew that it would but didn't have time to get the hardend rods and wasn't going to be sawing too many thousand feet on it. if you can get the real thing then do so, i will change mine when i get some spare time and money

[logwalker]

They will likely flatten to a small degree and then hold up better as they widen out. At first the bearings are riding on a single point but as the rods wear they have many time surface area. Might work better than you think. It would be interesting to see if this is true. Joe

[Minnesota_boy]

They will likely flatten to a small degree and then hold up better as they widen out. At first the bearings are riding on a single point but as the rods wear they have many time surface area. Might work better than you think. It would be interesting to see if this is true. Joe

The problem comes at the joint.  The rest of the track will slowly change but the carriage will drop off the hardened rod onto this slightly lower cold rolled rod.....and make it slightly lower each time.  Eventually the bearings that carry the head carriage will no longer climb up this hump to the hardened rod and your head will be stuck on the extension.

[Dana]

If the wear only occured where the hot roll and cold roll meet.  Use some hard surfacing welding rod to fix the problem on the cold rold rails.

[deadeye]

it wears all the way along. the best solution is the hardened rods