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Member postings for David George 1

Here is a list of all the postings David George 1 has made in our forums. Click on a thread name to jump to the thread.

Thread: how to machine an internal curve
06/09/2018 20:37:40

Why do you want to make them from stainless as the originals were made from alloy much easier to manufacture and just hard anodise to prevent wear.

David

Thread: bridgeport spares stockists
05/09/2018 23:31:24

This is the main supplier in UK **LINK** Not cheep but original quality and most parts are available. or call 1-800-843-8801 Option 3 very helpful on telephone. not connected in any way.

David

Thread: Chester Champion V 16 Z axis mod
04/09/2018 16:11:58

Done the side drive shaft and phos. bronze bush but ordered the wrong keyway broach from Arc so I will have to wait for new delivery. Made the keys and fitted them to shaft ready for when the broach arrives.

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David

Thread: The size and shape of drill holes
04/09/2018 08:41:46

Hi you can use a chucking machine ream to finnish blind holes as they are parallel and cut to size.

David

Thread: Chester Champion V 16 Z axis mod
01/09/2018 20:36:50

Shaft and bush turned now I just need to cut keyways in gears and screw bush into place to get basic hand wheel moved.

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Need more information on a 24 volt DC motor to drive the axis. How much power would I need? would it need to be a geared motor for slow feed with enough power to drive axis fast traverse.

David

31/08/2018 11:03:59

Done a bit more work on top housing for bevel gears.

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side shaft and bush to make next.

David

Thread: New member with a Centec 2 mill
31/08/2018 06:53:00

Hi Tony Welcome to the forum I don't have a Centec but there are many on this site who are more than willing to give advice and help.

David

Thread: Assessing machine wear
28/08/2018 10:22:00

Hi Mathew what model Bridgeport do you have and what expectations do you have as it is a can of worms depending what you intend the machine to do. I have refurbished a few in my working life but I had access to a large 8 foot by 4 foot granite surface plate a granite square and lots of lifting and machining equipment. The most wear on the slides were usually X axis worn in the middle so tight on the ends and loose in the middle and on the Y axis the same but not so bad but the adjustment gib strip was usually worn out. Let me know if you want any detailed information or you could send me a PM for contact details to phone me. Where are you based?

David

Thread: grit size for slip stone
27/08/2018 21:18:38

Hi Douglas I have always used a Norton IB-24 combination India stone 100mmx25mmx12mm size for rubbing over any mating surfaces like the bottom of a vice or just a rub over the bed of my mill to make sure any lumps are removed. I also have the same stone in a bigger size but rarely use it but it comes useful on larger pieces or pieces with a gap.

small bench stone.jpg

 

David

Edited By David George 1 on 27/08/2018 21:19:45

Thread: Facemill Hammering, solved
27/08/2018 07:08:22

Hi Paul thanks for letting everyone know that you have sorted your problem, to many times we don't get to know the outcome of the problem.

David

Thread: Chester 626 Mill Column
26/08/2018 08:16:02

Hi Phil welcome to the forum. About the rotating of the head, it is not used very often but I had a long piece of steel to drill to make a gib strip, and I set it up on an angle plate at 45 degrees with end over end of table then just rotated head to match angle and milled and drilled piece. I am sure there are other uses other people use it for other operations.

David

Thread: Aluminium eccentric
24/08/2018 21:54:52

The brake discs were a trial to reduce none sprung weight on racing motorcycles and was quite acceptable but you had to keep an eye on the coating for wear. The tool coating was done by Acorn Anodising local to where I live. The tool part was an aluminium sleeve with a groove cut in a spiral like a shallow thread in which a heating element was wound and then moulded over to make a pipe fitting. The sleeve was pulled out by a hydraulic puller and then rewound for next cycle, with little wear to sleeve the heating element was about a multimeter diameter and the groove was about .25 mm deep. Quite a pull.

David

Thread: Hello from Lancashire!
24/08/2018 14:10:27

Hi Tom welcome to the forum, What are you interested in. I bought a Chester 16V mill which i am very happy with and you could easily remove the head, 2 bolts and carry it up stairs. Also not to far from you to go and have a look which I would recomend.

David

Thread: Aluminium eccentric
23/08/2018 20:26:38

Hi Nick I have used high grade aluminium for all sorts of wear parts from motorcycle disk brakes to plastic mould tools but they were all hard anodised and some were PTFE coated, not cheap but very light and wears well.

David

Thread: Glass optical scale not working
22/08/2018 16:05:43

Daniel let us know how you get on not only are we interested but it helps others with similar problems. Also if you need any further help please ask.

David

Edited By David George 1 on 22/08/2018 16:06:54

Thread: What are these drill inserts
22/08/2018 07:55:04

Thanks Iscar inserts was correct.

David

21/08/2018 21:51:32

Some more some like centre drills and some like 12mm drill but different shank.

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David

 

Edited By David George 1 on 21/08/2018 21:52:40

21/08/2018 21:36:39

Hi I have been given some carbide inserts but with them are some drill tip inserts and wondered if anyone knows what they are and what make. One is 25mm and one is 12mm.

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David

Thread: Glass optical scale not working
20/08/2018 17:07:46

Hi Daniel have you cleaned the head by disembling the end caps and sliding out of the end the reader head. I use a solvent cleaner to flush through and use a can of air to blow it though and also on the reader head. Return the head to scale if you are sure it is clean looking through scale. You have to set the reader head up with the correct clearances using packing pieces and check that the head is in the correct sideways location. If it fails to work M-DRO have a helpful person and they also sell reader heads separate if it is not fixable.

David

20/08/2018 07:10:02

Hi Daniel first check the read head is set with correct clearances then swap the cables, making sure that they are marked up, from another axis and see if the problem moves to the other axis or the scale is stiĺl not working. Is it still under warranty what make is it.

David

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