Largest Manufacturing Technology Community on the Web
Stay Connected:
Search results
-
Deep hole grinding
I find it difficult to believe that it's a tool pressure problem if he's only leaving .001" to finish grind. We also still haven't been told the actual amount of taper... I would still try the move to a narrower pin and interpolate, myself. Run the pin down through and back up a few times and...- eKretz
- Post #14
- Forum: Abrasive Machining
-
Help With Surface Grinder Issue
It sounds like the mag chuck needs to be either pulled and cleaned underneath, or ground. I agree with the others that you should let a more experienced guy do it, if at all possible.- eKretz
- Post #10
- Forum: Abrasive Machining
-
Custom made 3/4" boring bar up-scaled from a 3/8" boring bar that can't hold it's pants up.
Some of the bars angle the tool for a little more clearance. This is especially important at smaller diameters. And I don't recall after reading through all this who disagreed with Limy Sami but I fully agree with him. I occasionally use a CNMG for heavy roughing and both the boring bar and... -
Deep hole grinding
I misunderstood. I thought you meant that the holes in the ceramic workpiece were blind. In reality, you meant that the exit side of the holes are covered by a small c'bore in the fixture. So yes, I would definitely cut exit holes for the coolant. How did the taper look with the air spindle...- eKretz
- Post #10
- Forum: Abrasive Machining
-
Deep hole grinding
If it's a blind hole, I wonder if you aren't hitting the bottom of the hole or rubbing in the bottom corner. That would flex the shank of the tool and might well create the taper that's smaller at the bottom. It might be easier to use a quick lap for final finishing.- eKretz
- Post #8
- Forum: Abrasive Machining
-
Deep hole grinding
I think he didn't realize that you were trying to grind full length at once with no in/out of the hole travel. It would probably work better to use a narrower point and interpolate down through. If you are using a non-dressable point it may not be perfectly straight. How much taper are you...- eKretz
- Post #5
- Forum: Abrasive Machining
-
Interesting surface grinder converted to belt sander/grinder
Mattison made one of these from the factory. I think I have a scan of the literature somewhere. -
FS: Gaging and measuring equipment
No, I know mostly nothing about any Chinese tools.- eKretz
- Post #10
- Forum: Tooling, Parts and Accessories For Sale or Wanted
-
How common is sharpening your own endmills ? Favorite grinder for that purpose ?
Yes, which means that the end of the cutter *is* cutting, which was the original premise! Ay caramba. -
How common is sharpening your own endmills ? Favorite grinder for that purpose ?
Most just sharpen the ends and the leading edges of the flutes. They are a little tricky on the leading edge. If you don't get the geometry right they don't cut very well. Probably need a CNC grinder to dress the wheel for sharpening the OD. -
How common is sharpening your own endmills ? Favorite grinder for that purpose ?
I believe that is correct, but only on the trailing tooth. Johansen is correct about the leading tooth but I think did not consider the trailing tooth on the other side of the cutter... -
OT: Motor Generator Experiment - Open Source Project :)
All right, time to shut this one down before it gets violent. -
Hamas strike on Israel.
Wow, I haven't seen that one for a dog's age. 😄- eKretz
- Post #1,181
- Forum: Manufacturing in America and Europe
-
Deep Boring Holes
There are times when it makes sense and times when it doesn't. That's what experience will teach you. I used to use a few specialty suppliers that had really good prices for tubing, but I'm pretty much out of the purchasing game these days. -
OT: Motor Generator Experiment - Open Source Project :)
Oh boy. When you join pretty much any message board, you need to read the rules and any sticky posts before posting. This is a message board that is related to manufacturing and machining. It is absolutely not an open forum to discuss whatever you want. If you have a specific technical question... -
Need help finding a G&L Drawbolt
Most of the newer drawbars that I've worked on have a short replaceable male thread insert that's keyed into the main body of the drawbar and held in with a bolt from the business end of the spindle. There's no need to take the entire machine apart for those. I'm afraid I'm of little help if you... -
FS: Gaging and measuring equipment
Absolutely hands-down my favorite dial calipers. If I didn't already have so many dial and digital calipers, I would snap these up in a heartbeat.- eKretz
- Post #6
- Forum: Tooling, Parts and Accessories For Sale or Wanted
-
Deep Boring Holes
Rotary table on an HBM and bore from both ends; or line bore if you don't have a large rotary. Could probably poke it through from one end with the right single-ended bar and tool geometry, but if you don't know how to do this already, you might find it taxing. -
OT: Motor Generator Experiment - Open Source Project :)
@NeuEnergy you need to add an OT tag to this thread or I will lock it. -
What new parting holder with inserts to get? Recommend yours? Also milling insert questions.
If you two want to keep blowing each other kisses, take it to PMs, eh? :D