Bad Sport HALF A BUBBLE OFF Staff member Legendary Member Joined Jun 12, 2010 Messages 44,805 Reaction score 34,730 Location The Wolverine State Apr 12, 2014 #1 Just came across these items, I know the ones in the tubes are end mills I believe, but the other item in the tool roll I haven't a clue. Can someone shed some light on the subject? Attachments end mills.jpg 87.9 KB · Views: 318 century set.jpg 99 KB · Views: 321
Just came across these items, I know the ones in the tubes are end mills I believe, but the other item in the tool roll I haven't a clue. Can someone shed some light on the subject?
jos51700 Green Bearing thread connoisseur Joined May 24, 2009 Messages 7,405 Reaction score 3,089 Location Bel-Ray Apr 12, 2014 #2 Pilot reamers. Edit. Typed that and then saw the screw sizes above the bit tips. Spot face/recessed hole bores for screws.
Pilot reamers. Edit. Typed that and then saw the screw sizes above the bit tips. Spot face/recessed hole bores for screws.
bighammer Well-Known Member Joined Dec 17, 2012 Messages 2,389 Reaction score 143 Location Northwest Oregon Apr 12, 2014 #3 Looks to me like "boring bars" like what you would use on a metal lathe.
Bad Sport HALF A BUBBLE OFF Staff member Legendary Member Joined Jun 12, 2010 Messages 44,805 Reaction score 34,730 Location The Wolverine State Apr 12, 2014 #4 And I guess I should add, how would they be used? I noticed those end mills in the tubes were 20-25 bucks apiece. Any idea on the cost of the others?
And I guess I should add, how would they be used? I noticed those end mills in the tubes were 20-25 bucks apiece. Any idea on the cost of the others?
pishta I know I'm right.... Joined Oct 13, 2004 Messages 23,824 Reaction score 13,683 Location Tustin, CA Apr 12, 2014 #5 those look like pilot bits for enlarging holes or for drilling shoulder bolt holes
Bad Sport HALF A BUBBLE OFF Staff member Legendary Member Joined Jun 12, 2010 Messages 44,805 Reaction score 34,730 Location The Wolverine State Apr 12, 2014 #6 pishta said: those look like pilot bits for enlarging holes or for drilling shoulder bolt holes Click to expand... That's kinda what I though originally, but there is no taper. Both steps are square, if you will, at the tip.
pishta said: those look like pilot bits for enlarging holes or for drilling shoulder bolt holes Click to expand... That's kinda what I though originally, but there is no taper. Both steps are square, if you will, at the tip.
Bad Sport HALF A BUBBLE OFF Staff member Legendary Member Joined Jun 12, 2010 Messages 44,805 Reaction score 34,730 Location The Wolverine State Apr 12, 2014 #7 Here is an end view of the Century tooling. Attachments century set end.jpg 64.8 KB · Views: 277
Bad Sport HALF A BUBBLE OFF Staff member Legendary Member Joined Jun 12, 2010 Messages 44,805 Reaction score 34,730 Location The Wolverine State Apr 12, 2014 #8 The tool roll pieces are: Twentieth Century Manufacturing Company Libertyville, Ill. And they refer to them as Superbore.
The tool roll pieces are: Twentieth Century Manufacturing Company Libertyville, Ill. And they refer to them as Superbore.
G gary74 Member Joined Aug 11, 2012 Messages 9 Reaction score 0 Location Platte, SD Apr 12, 2014 #9 We use them to counter sink holes for cap-screws
damraider FABO Gold Member FABO Gold Member Joined Aug 29, 2007 Messages 1,279 Reaction score 222 Location San Ramon , Ca Apr 12, 2014 #10 Yep. pilot on the end should be 1/16 over the screw size and the cutter is 1/16 over the head size of as socket head cap screw .
Yep. pilot on the end should be 1/16 over the screw size and the cutter is 1/16 over the head size of as socket head cap screw .
cjh Well-Known Member Joined Jul 21, 2010 Messages 1,038 Reaction score 32 Location Rockhampton Apr 12, 2014 #11 gary74 said: We use them to counter sink holes for cap-screws Click to expand... Yep....that's them.....the Pilot/Spigot good for when you require a spot face on and uneven surface. Here is an example....although I modified a drill bit to do it. Attachments IMGP5219.jpg 80.3 KB · Views: 254
gary74 said: We use them to counter sink holes for cap-screws Click to expand... Yep....that's them.....the Pilot/Spigot good for when you require a spot face on and uneven surface. Here is an example....although I modified a drill bit to do it.
M moe7404 moe7404 Joined Dec 14, 2012 Messages 688 Reaction score 106 Location wichita, ks Apr 16, 2014 #12 i call them counter bores.
rlevs Well-Known Member Joined Aug 13, 2012 Messages 1,075 Reaction score 58 Location Motor city Apr 18, 2014 #13 spot face or counter bores used to make a surface for the bolt head to set on