Needs Pictures: 0
Results 1 to 10 of 10
-
25th Jul 2017, 04:25 PM #1.
- Join Date
- Nov 2008
- Location
- Perth WA
- Age
- 71
- Posts
- 6,459
Tooling Review - An Inexpensive Chamfer Cutter from Shanghai
45 degrees centering chamfering cutter HOLDER SSP C20-20-120L +TCMT16T304 | eBay
I had been thinking that it would be quite convenient to have a 45 degree cutter that I could mount in a collet chuck rather than the arbor mounted cutters I have used so far. There are numerous offerings on eBay and I thought I would take a punt on one from the seller Jay Zhou. I have purchased a number of toolholders from Jay Zhou and most are OK. ( Not all, I have come unstuck with a maybe too cheap parting off tool. Might be worth another review.)
I used a scrap of 4140 for the test piece. The spindle speed was approximately 950 rpm and I used the mill's slowest table feed, 11mm per minute. The as supplied insert did not provide a flash finish ( second photo below). The Kennametal insert with a 2mm depth of cut produced a reasonable finish in my humble opinion.
Not too bad for just under twenty bucks. It should prove handy.
Bob.
-
26th Jul 2017, 08:54 AM #2Golden Member
- Join Date
- Apr 2009
- Location
- Ballina N.S.W.
- Posts
- 644
Hi BT,
Have you tried running the cutter a fair bit faster with a slightly less depth of cut. I have a 32 mm diameter 45 degree cutter with two inserts and get the best results running it at 1600 rpm and a 1mm depth of cut and vary the feed rate to suit different materials and end up with an almost polished surface. Your cutter is a lot smaller in diameter so surface speed is well down and it looks like from your pictures it is leaving step marks.
Bob
-
26th Jul 2017, 07:51 PM #3.
- Join Date
- Nov 2008
- Location
- Perth WA
- Age
- 71
- Posts
- 6,459
Hi Bob,
Heeding your advice, I had another go, though unfortunately I have mislaid the 4140 sample in the midden I call a shed.
The cutter needs reasonably careful positioning in relation to the workpiece to avoid the back of the insert cutting a step -
DSC_7841 (Large).JPGDSC_7847 (Large).JPGDSC_7846 (Large).JPG
The first test was on some 4E cast iron. The first cut at 700 rpm and about 3mm deep. Same 11mm/min feed as yesterday. I thought the finish looked OK-ish. Then I increased the spindle speed to 1600 rpm with about 0.5mm DOC and the finish was improved. There appears to be some chatter.
DSC_7854 (Large).jpg
Then I had a go with a piece of 1020. I reckon the finish is better with a spindle speed of 700 rpm, the initial cut on the left hand side, than the 1600 rpm cut on the right.
DSC_7870 (Large).jpg
BT
-
26th Jul 2017, 08:13 PM #4Most Valued Member
- Join Date
- Apr 2012
- Location
- Healesville
- Posts
- 2,129
Hi BT, if you attack that cutter shaft with a hacksaw you might get a bit less vibration and a bit more Z.
cheers, shed
-
26th Jul 2017, 08:38 PM #5.
- Join Date
- Nov 2008
- Location
- Perth WA
- Age
- 71
- Posts
- 6,459
Something like this Shed?
DSC_7195 (Large).jpg DSC_7208 (Large).jpg DSC_7214 (Large).jpg
-
26th Jul 2017, 09:04 PM #6Golden Member
- Join Date
- Apr 2009
- Location
- Ballina N.S.W.
- Posts
- 644
Hi Bob,
I did not realise how long that shank is/was on your cutter. Shank has the idea.When you shorten that tool as you have shown, I am sure you will get rid of that chatter. Here are a few pictures of my cutter it has a 20 mm dia shank and as you can see by the marks on it I run it as short as possible. Good luck.
Bob
-
26th Jul 2017, 10:01 PM #7Most Valued Member
- Join Date
- Apr 2012
- Location
- Healesville
- Posts
- 2,129
-
26th Jul 2017, 10:23 PM #8.
- Join Date
- Nov 2008
- Location
- Perth WA
- Age
- 71
- Posts
- 6,459
Bob and Shed,
My anorexic example is probably a touch extreme. That boring bar was thinned from 20 to 10mm and the shank reduced in length to about 28mm to fit my boring head. I was thinking of maybe 12mm to suit my largest direct fit 30 taper collet which sits pretty much flush with the spindle nose and the ER20 chuck on the mill's high speed head. It would also fit my lathe's tailstock chuck.
Or I could just do as Shed suggests and trim off the overhang. And Shed, the only chip spitting has been on the test pieces.
Bob.
-
26th Jul 2017, 11:25 PM #9Most Valued Member
- Join Date
- Apr 2012
- Location
- Healesville
- Posts
- 2,129
Your a man with a plan Bob, that makes sense to make it more versatile.
-
27th Jul 2017, 11:13 AM #10Senior Member
- Join Date
- Dec 2013
- Location
- Sydney
- Posts
- 201
Similar Threads
-
Inexpensive Flat Belt Supply
By Briangoldcoast in forum METALWORK GENERALReplies: 17Last Post: 29th Mar 2015, 01:50 PM -
Long Term Review of Token Tools LG-40E Plasma Cutter.
By BenM78 in forum METALWORK GENERALReplies: 3Last Post: 4th Mar 2013, 10:03 PM -
How to use a Chamfer cutter
By denncarm in forum METALWORK GENERALReplies: 9Last Post: 20th Feb 2013, 11:25 PM -
Book review
By morrisman in forum METALWORK GENERALReplies: 6Last Post: 17th May 2012, 09:29 AM -
small inexpensive plasma cutter-advice please
By Mathuranatha in forum METALWORK GENERALReplies: 42Last Post: 15th Jul 2008, 03:08 PM