Thanks: 0
Likes: 0
Needs Pictures: 0
Picture(s) thanks: 0
Results 1 to 1 of 1
-
1st February 2020, 02:20 PM #1Most Valued Member
- Join Date
- Aug 2015
- Posts
- 4,424
Big drill grinder with point splitting.
SAM_0592.jpgSAM_0593.jpgSAM_0594.jpgSAM_0595.jpgSAM_0596.jpgSAM_0597.jpgSAM_0598.jpgHello from the Old Goat again.
I did start with this in the Projects file but this thread gets more response. Not after glory, I want your ideas too.
This is built from scrap and a piece of 1.5 X 1.5" angle. The length stop is a piece of 1.5" rnd bar with 2 flats cut with the shaper. A piece of 3" fire pipe with a screw secures it. Using my sub plate it fits the Clarkson well and can change from grinding on to the edge to off the edge by swinging left or right. No clamping is used at the business end as I rotate the drill every 2 thou of feed. Pic 2 has the primary facet at 10 deg. Pic 4 has 25 deg set for secondary facet. Pic 5 has my setup tools, the CNC part is hidden. No 6 shows how to set it up for split pointing and as the Clarkson has no table stops I pass thru when splitting the point as seen in the last pic. My biggest drill is 1 7/8" and just fits under the wheel for splitting.
When I get time I will dimple the stop for the clamp screw and drill it thru for a fine adjust screw stop. 24 TPI. I didn't have a chatter problem but would prefer to use it on a larger grinder. The Clarkson is only 280kg and with the jig cantilevered off to one side it's not too rigid.
The Ruby grain wheel is not as agressive as a 38A unit but the finish is as good as CBN 180 grit. It may burn if not kept dressed. It's the same grain as used in saw gulleting wheels. I have had 2 wheels, of different width, for gulleting annular cutters on the same grinder for 13 years. Not that I do many but maybe 2000 cutters gulleted so far. And little wear.
Lets kick the ball along for a grinding and toolroom sub forum.
BC
Attached Images
- SAM_0592.jpg (194.4 KB)
- SAM_0594.jpg (118.5 KB)
- SAM_0595.jpg (186.6 KB)
- SAM_0596.jpg (186.1 KB)
- SAM_0597.jpg (140.6 KB)
- SAM_0598.jpg (186.9 KB)
- SAM_0593.jpg (169.8 KB)
Read the full thread at metalworkforums.com...
-
1st February 2020 02:20 PM # ADSGoogle Adsense Advertisement
- Join Date
- Always
- Posts
- Many
Similar Threads
-
Cutter grinder indexing for split point drills
By MWF FEED in forum METALWORK FORUMReplies: 0Last Post: 1st January 2020, 02:30 PM -
Brad Point Drill Bits - Two Types?
By IanG3145 in forum WOODWORK - GENERALReplies: 23Last Post: 26th July 2017, 06:41 PM -
9/16" brad point drill bit
By Woodwould in forum WOODWORK - GENERALReplies: 8Last Post: 18th May 2010, 05:29 PM -
Brad Point Drill Bits.
By Captain Chaos in forum WOODTURNING - PEN TURNINGReplies: 10Last Post: 13th July 2005, 08:12 PM