PRECISION LATHE TURNED SMOOTH BSA SCOUT AXLES (set of 4)
POLISHED AND READY TO GO!
It’s always a challange to turn a BSA NAIL into a BSA AXLE. These meet the challange. The WDSA Speed Axle IV is the best. But, if your race rules require the Official BSA nail then this one fits the bill.
These axles are NOT BSA Replicas. They are made from the OFFICIAL BSA PINEWOOD DERBY® SCOUT NAILS right out of the box. They have been precision turned smooth and straight to remove the nail forming marks from the shaft and the metal flash from the inside face of the head. The inside face of the head is slightly beveled back and polished to reduce the contact area with the outer bore face. These are STRAIGHTEND, SMOOTH, POLISHED*, and READY TO GO. I prepare the axles with a 2000 grit wet sand and a quick final buff with red rouge before packaging. If you wish (and I would recommend) you may apply a finer wet sand (3000+) finishing up with fine jewelers rouge. You can never be too shiny. Check out my Stage II 0.3 micron Polish Kit.
As always, check your rules for legality
NOTE: The H47 axle is turned down for a distance of .300″ from the inside of the nail head.
WHY? I only continue the cut for .300″ from the head to ensure the rest of the nail fits properly in the BSA block. The .300″ polished section is enough area to ensure the bore does not ride on the unprepared surface. This assumes that the gap between the body and the hub face is no greater than .056″ or about 5 standard playing cards.
IMPORTANT NOTE: The raw BSA nails are running about .084″ (minor diameter) to .089″ (major diameter) depending on where you measure the oval cross-section. I’m noticing that the crimp marks (on the minor diameter) are getting quite deep relative to previous runs. In order to get a round cross-section and substantially remove the crimp marks, I need to turn the nails down to around .080″. That’s only a .002″ sliver. But, it has to come off to ensure a straight cut.