- Thread starter Kram
- Start date
Tool Cutter Grinder results
View attachment 140105
still need to sort out grinding the sides, I have made up he guide but am not happy with the forward motion control yet.
Angles for grinding drill bits are also doing me head in, especially when I can grind them by hand easier
Drill grinding is a different animal and involves a cam to create the backing off from the cutting lip.This effectively allows the drill to feed into the wheel the more it is rotated via 180 deg rotation approx (360 div 2 for the two cutting edges) to create that backing off. It's something not normally done on standard format cutter grinder although there is nothing stopping you making something. Using static angles which is what can really only be created on a standard format cutter grinder inst really that successful, it generally generates weak geometry that will lose its edge fast.
Tool Cutter Grinder results
View attachment 140105
still need to sort out grinding the sides, I have made up he guide but am not happy with the forward motion control yet.
Angles for grinding drill bits are also doing me head in, especially when I can grind them by hand easier
I maybe misunderstanding.. Are you referring to twist drills or the image you show of a slot drill and end mill? If that's is the case what bit is going wrong for you? Have those been sharpened? If so there is still visible wear on one at least i can see. Although images don't show the full story all the time, but they don't look particularly well ground from what i can see.
Still work in progress at the moment. The pictures make them look a lot rougher on the grind than they are, I can see the lines but no detectable ridges when I run my nail over them.
I bought a job lot of old and new cutters from Newark. Playing about with the old ones.
I think I need to put some bushes into the nylon carriage block or split the back so I can have adjuster screws to take out any play. Unfortunately I can't get enough height on my little mill to line bore the holes.
Yes it's creating the backing off I was talking about for the drill bits.
I bought a job lot of old and new cutters from Newark. Playing about with the old ones.
I think I need to put some bushes into the nylon carriage block or split the back so I can have adjuster screws to take out any play. Unfortunately I can't get enough height on my little mill to line bore the holes.
Yes it's creating the backing off I was talking about for the drill bits.
My Mum needed a cable needle for something she was knitting but didn't have the right size so she asked me to make one by cutting down a standard needle.
I started with this & cut 4" off one end.
I used the original pointed end to set the angle on the top slide then turned a point on the cut end. It's made from some type of plastic that doesn't machine too well, had to resort to a file & emery cloth to get a passable finish.
The finished article. My Mum was amazed that I was able to put a perfect point on it, now I have to make another one from the rest of the needle! But it earned me a few brownie points, something to have in reserve!
I started with this & cut 4" off one end.
I used the original pointed end to set the angle on the top slide then turned a point on the cut end. It's made from some type of plastic that doesn't machine too well, had to resort to a file & emery cloth to get a passable finish.
The finished article. My Mum was amazed that I was able to put a perfect point on it, now I have to make another one from the rest of the needle! But it earned me a few brownie points, something to have in reserve!
Blake's 7
Member
- Messages
- 205
- Location
- Ireland
My Mum needed a cable needle for something she was knitting..........
The finished article. My Mum was amazed that I was able to put a perfect point on it, now I have to make another one from the rest of the needle! But it earned me a few brownie points, something to have in reserve!
I really enjoy seeing the diversity of work that is done by forum members such as yourself.
grim_d
Unlikeable idiot.
- Messages
- 4,246
- Location
- Scotland - Ayrshire
A work colleagues rivet pullers came with two 1/8th fittings so made up a new one for 3/32.
3/8-24 threads, no die so was screwcut using my new er16 insert holder.
Drilling a 1/16th hole was a bit sketchy with a full size chuck but slow and steady got there.
New one at the top, original at bottom. (Stole the o ring from the original)
3/8-24 threads, no die so was screwcut using my new er16 insert holder.
Drilling a 1/16th hole was a bit sketchy with a full size chuck but slow and steady got there.
New one at the top, original at bottom. (Stole the o ring from the original)
grim_d
Unlikeable idiot.
- Messages
- 4,246
- Location
- Scotland - Ayrshire
Milled the hub/boss off a couple big ol' cast iron valve wheels for a mate, going to make them into bases for bar stools.
I know coolant is a bit frowned on with cast iron but after it obliterated one cutter I did what needed to be done!
I know coolant is a bit frowned on with cast iron but after it obliterated one cutter I did what needed to be done!
james butler
Member
- Messages
- 1,512
- Location
- birmingham england
too bigger cut in one go?
slim_boy_fat
Forum Supporter
- Messages
- 29,540
- Location
- Scottish Highlands
Will these feature in a new thread?
grim_d
Unlikeable idiot.
- Messages
- 4,246
- Location
- Scotland - Ayrshire
I can probably get a picture when they are done but milling those wheels was the extent of my involvement
Hood
I am obsessed.
- Messages
- 17,308
- Location
- Carnoustie, Scotland
I use coolant all the time when machining the cast hauler plates, not so much for tool life but more for containment of the dust/chips. Just have to make sure you clean up well afterwards or it sets like concrete. Then again even when machined dry you should clean up well as it is very abrasive.
Windy Miller
Semi-Professional Potterer!
- Messages
- 3,595
- Location
- North Kent, UK
Just a thought - is there a danger that the dust would get mixed/suspended within the coolant and create a type of grinding paste? A good case for a magnetic filter if some sort I'd think.
brewdexta
The biggest tool in the box
- Messages
- 5,603
- Location
- UK
I'll remember that for when I get the Triumph's coolant sorted, I didn't see anything other than a course strainer.
Hood
I am obsessed.
- Messages
- 17,308
- Location
- Carnoustie, Scotland
My Triumph is just standard, it is the Churchill CNC I have the filter on, no reason though that I couldn't do the same on the Triumph.
The ones I have, I got from eBay, just an inline filter bowl with a fine mesh filter. It is amazing how often I have to clean them out, especially the one on the Chiron.
The ones I have, I got from eBay, just an inline filter bowl with a fine mesh filter. It is amazing how often I have to clean them out, especially the one on the Chiron.
