Member postings for Emgee

Martin

On the Emco toolpost I have the dovetails are offset, this means you need 2 types of toolholder, the tool fixing screws and adjuster are reversed top to bottom for the boring tool position.

Toolsetting tables on a cnc program are normally generated by determining the offset in Z and X axis with the cutting tool fitted to and always remaining in that numbered holder, so if the tool remains in the holder no difference will be found when the toolholder is changed during a program run.

I agree cutting 1 V slot is much easier but only 1 move of the table needed to cut the second V parallel to the 1st.

Emgee

The statement that the 2 V's will be at different dimensions is acceptance of poor machining practise, perhaps you can get away with the support given by 1 V in contact but heavier cutting could find it a weakness.
Why did Dickson, Bison and others gp to the additional cost and adopt 2 V's if 1 is sufficient ?

Emgee

Well worth getting some power to the spindle and fix the rest with some TLC.

Emgee

See this page at Lathes UK for some dimensions of Dickson toolholders.

**LINK**

If you can't find the type needed you could make your own on the mill, 1 of the important dimemsions is the between V's centres, keeping the rest to your existing toolholder sizes should be straightforward machining.

Emgee

Hope those bidding have seen the sting in the tail + 44% cost to the hammer price.

Emgee

I haven't experienced the same build up problems associated with aluminium when using PCD insert, so far have only used dry, next time i'm using a PCD I will try some fluid on the cut.

Still get the bird's nest but it seems to fall away when the tool clears the work, if forming a ball it can be pushed clear with a stick.

Emgee

I use PCD in 070202/4 insert size but not the APT version, those I have are from an AliExpress dealer who I have been using for about 2 years, I have the ccmt 0602 size for a boring tool but have not used it yet.

The finish is superb and tool life is way beyond that of the GT type inserts on 6082 and 7075 aluminiums, yes very fine cuts can be made such as needed when sizing ringless pistons.

Emgee

OK for me

Emgee

Keith

Could the drag of the bearing seals be causing extra work for the engine which is contributing to the temp rise indicated ? this may be heating the front housing so could be felt after running.

Emgee

If you are going to earth the cable screens at the VFD you need to use the correct earth bonded gland or other suitable arrangement.

Emgee

Martin

Plenty of info here on M fine threads, not in the exact size you need but will give you some idea.

**LINK**

Emgee

Yes thanks Jason, I saw those and similar on-line but they refer to steel components, could't find info for brass.

Emgee

Hi Martin

Loctite spec I found only mentions gap and time to cure, no detail of materials.

Emgee

Edited By Emgee on 22/08/2023 22:38:18

Have 601 and 638, which will be best for 6mm diam pin in a 3mm deep blind hole CZ121 brass/brass joint ?

Emgee

Brendan

I think it's because of the spectacular word, I don't ever recall that word being used to describe the quality of a tool so something that is different stands out.

Don't loose sleep over it.

Emgee

Black Delrin is another alternative.

Emgee

Have you checked any limit switches fitted for correct operation, such as a chuck guard switch ?

Emgee

If using the quill to downfeed you need to make sure it is descending in a true vertical plane, otherwise the hole will be bored at an angle to the top face.

Emgee

If anyone wants to learn more about the Grenfell fire tragedy I suggest you spend a few weeks watching all of the videos taken of the enquiry, they are all posted on Youtube. It's quite an eye opener to the way sales of insulation board was promoted, fire safety testing establishments shortfalls, design of the new windows installation method, ventilation system downfalls, door closers missing or not functioning, the list goes on and on.

Emgee

Link to the Chairman's statement of Phase 1 of the enquiry,

https://youtu.be/YE9idAhfq4o?si=05kz7X0lvpfwxUNb

Edited By Emgee on 23/07/2023 23:34:15

Probably best to remove the rotor completely, options then to try mounting in a press with a plate behind the part you want to remove to check if it's a press fit, if not can you drill and tap for a screw to fix the spring on ?

Emgee