fixing a tip.

[Angelus1781]

Tried to use the search but it just bombs out.


Question on how to fix a blunted tip on my 630. Don't remember what happened to it, but edge was dull, and tip was blunted. The edge is razor sharp again, just need to fix the tip on. Suggestions?

 

[STR]

You have to do the grinding from the spine portion. Take it down with as fine a touch as you can. I have used grinding wheels but prefer belts to keep the heat down. Do it little by little taking your time with long sweeps so it all flows together and that there isn't any dips from taking one part in too far. Never let the blade get hot. Dip it in water if need be but if you do it right you should not even need water. Just take it slow.

Hope that makes sense. You are basically taking the hole of the spine down just a notch to bring it uniformly back to a point. Then after it has a nice point use a cratex 3M wheel or a super fine belt or emory cloth by hand if those aren't available to smooth the lines from the grind marks. Be careful not to let the emory cloth fold over the edge to scratch the face of the blade or the wheels slip off the edge and mark the blade face. Just keep it at a low rpm and take your time.

I have repaired many broken tips this way with success. The key is to not be in a hurry.

 

[ErikD]

If this is your first time grinding a broken tip I would suggest starting out on a coarse diamond stone. Sure a power grinder will make it faster, and do a fine job if you have some experience. If you have never done it before though it will also let you do a lot more damage a lot faster too. As mentioned when using an electric grinder of some sort you always need to be very aware of heat damaging the HT of the blade, but with a stone you don't need to worry.

If you don't have any diamond stones some sandpaper on a flat surface, such as a glass plate or ceramic tile will work out fine too. Just take your time, and don't rush into it without preparing.