Member postings for Emgee

Brian

Different tip radius, 02=.2mm, 04=,4mm and so on.

Text below copied from an earlier post may help you.

First letter denotes insert shape, C=80deg Rhombic, D&K=55deg, R=Round, S=Square, T= Triangular, V=35deg.

Second letter denotes clearance angle. B=5deg, C=7deg, E=20deg, N=0deg, P=11deg.

Third letter denotes tolerances on thicknes and inscribed circle size, M denotes +or- 0,13mm for thickness.

Fourth letter denotes type, A,N,Q & W are flat top, G,M & T tops are shaped to provide cutting clearance and chip breaker.

First 2 numbers denote cutting edge length, 06=6mm on C shape insert, 07=7mm on D shape insert.

Next 2 numbers are insert thickness, 02=2.38mm, 03=3.18mm, T3=3.97mm, 04=4.76mm

Next 2 numbers are for nose radius, 02=0,20mm, 04=0,40mm, 08=0,80mm, 12=1.20mm.

The ISO codes sometimes have additional info such as PF for finishing or PR for roughing.

Emgee

Edited By Emgee on 15/10/2016 10:01:44

Mike, check the APT link above to see the various shapes of inserts and the method of retaining in the tool. If you want economy of inserts the triangular shape has 3 cutting edges and in the correct toolholder will face and turn your work. There has been a good deal of dicussion on this group regarding shapes and dimensions of inserts, well worth looking back through the topics pages for more info.

Topic to search in is Insert tip query

Emgee

Edited By Emgee on 11/10/2016 22:43:06

Thanks for the tip Roy M will keep it in mind, you mention Y axis in your reply but on my lathe the axis are referred to as X and Z, the latter being traverse from tailstock to chuck so I believe your Y is my X ?

Emgee

Hi Roy M

Please advise on fitting a drill correctly in the tailstock chuck.

Emgee

Isn't it the case that a sideways force is applied to any centre cutting slot drill because of unequal length lips ? if so this would apply regardless of holding device.

No doubt like many others I have used some of the smaller size milling cutters and slot drills held in a drill chuck, I stopped the practise after finding the slot became deeper and wider as the tool moved along it's intended path.

Emgee

Surely the opportunity already exists for anyone to write up an article on a repair job of any kind ? Just submit with the relevant title.

Emgee

mick

I'm also a G code man, but if cnc is cheating I must be a bigger cheat than you as I also use a few M codes. !!!!!!!

Emgee

Hi Mike, dies are sized according to head size so are all different.

Emgee

Hi Frank

Even if you are able to find a supplier of socket cap screws in the smaller BA sizes I think you will find the cost prohibitive.

Emgee

Think it's about time one of the Moderators moved the last few posts to a separate Topic, surely the Moderators are not responsible for the OS used for the Forum.

Emgee

Peter,

As .Simon suggests you do need to nip up all axis gibs to ensure best rigidity. Are you using the same size cutter as the width of slot required ?

It is best to use a smaller diameter cutter so you can then take a finishing pass on each side of the slot to get the finished width.

Perhaps some cutting oil or whatever you use will assist and I use air jet at 20lbs to keep the swarf clear.

You dont mention the size of cutter but perhaps you need more rpm on the spindle to reduce the tooth load with a 2 flute slot drill ?

Emgee

Mark, the isolator you linked to should be OK but don't forget to connect both ends of the cable metal braid for continuity of protection, either use earthing rings with connecting conductor or take the tails into the enclosure and connect at the earthing terminal with the cpc's (g/y earth cables)

Emgee

Mark

Type C mcb, use ramp up speed to prevent mcb tripping.

Cable shown is suitable but if you don;t use the proper glands that are listed be sure to take a tail of the protective braid into the earth terminal at source of supply and same at motor. The 1.5mm size will be OK with such low current and short lengths but you may have to go to 2.5mm to satisfy short circuit protection of the type C mcb.

You may want to fit a Double Pole isolator in the feed from the consumer unit to provide complete isolation of the supply at the inverter.

Emgee

Bazyle, states Continuos Duty on the plate but your advice should be headed.

Edited By Emgee on 03/08/2016 12:46:46

Clogs, if you can use a Mag type drill depth of cut can be controlled so you don't take the edge off the drills when breaking through the angle and into the concrete. This would also be a bit safer when drilling from steps.

Emgee

Great collection of full size steam engines at Thursford which is close to the above mentioned attractions.

Emgee

Steve, DDT has given a positive answer to your question, sounds like good advice to me.

Emgee

Peter

Sandgrounder is right about Davall Gears give away gear size disc, I have scanned mine and put a couple of hole dimensions in to enable the correct sizing, it is only for MOD gears 0.5 to 6.0

Emgee

.

Andrew, with such cuts do you have a jack or packing between the table and the gear close to the cut to take downward forces off the mounting to the RT ? Do you have power feed to raise the table ?

Emgee

Stefan

New steppers and control will mean faster rates of travel, but the standard motors will traverse faster than needed when cutting so the only time faster travel is useful, and saves time, is on non cutting moves.

New steppers with 200 steps per rev would be theoretically more accurate than the existing, although the std set up may prove to give consistently accurate results within your allowable tolerances.

Emgee

Stefan, if the Welmill and Welturn are working fully there is very little to be gained by retrofitting. If you search the Yahoo Emco forums you may find operating manuals for the software.

If you are a member there just ask for some info on running the software and I'm sure someone will help.

Emgee