Search found 77 matches

by armscor 1
Tue Jul 16, 2019 5:10 pm
Forum: Milling Machines
Topic: planer
Replies: 20
Views: 2687

Re: planer

Watching Keith Rucker on youtube who is currently restoring a New Haven pre 1900 metal planer, must watch.
I have only seen one metal planer in the flesh, rusting away on a farm in Tasmania.
Love to have one sitting in my workshop, just to watch it operating!
by armscor 1
Sun Jul 14, 2019 7:05 pm
Forum: Lathes
Topic: Enlarging Taper in Tailstock Quill--Pros? Cons?
Replies: 15
Views: 2050

Re: Enlarging Taper in Tailstock Quill--Pros? Cons?

Quill I made.
Honed Tailstock bore to a nice finish, was rough from the manufacturer and machined OD of quill to suit for a good fit.
The centre of tailstock sits 2 thou high, happy with that.
by armscor 1
Sun Jul 14, 2019 4:00 pm
Forum: Lathes
Topic: Enlarging Taper in Tailstock Quill--Pros? Cons?
Replies: 15
Views: 2050

Re: Enlarging Taper in Tailstock Quill--Pros? Cons?

I made a new mt3 quill for my lathe and finished the bore with a roughing and finishing reamer. I doubt the quill is hardened, mine was soft, simply bore out the quill and finish with reamers. You need a lot of pressure on the reamer to remove material. I made my quill out of 4140 and has performed ...
by armscor 1
Fri Jul 12, 2019 4:21 pm
Forum: General Discussion
Topic: Looking for 4032
Replies: 13
Views: 2709

Re: Looking for 4032

A lot of piston manufacturers use Hyper Eutectic pistons. A hypereutectic piston is an internal combustion engine piston cast using a hypereutectic alloy–that is, a metallic alloy which has a composition beyond the eutectic point. Hypereutectic pistons are made of an aluminum alloy which has much mo...
by armscor 1
Wed Jul 10, 2019 11:44 pm
Forum: General Discussion
Topic: Looking for 4032
Replies: 13
Views: 2709

Re: Looking for 4032

Silicon content is the problem with 6061, not enough, too much thermal expansion, JE piston company give a good explanation why they use 4032 for their cast and forged pistons.
by armscor 1
Mon Jul 01, 2019 5:26 pm
Forum: Lathes
Topic: Colchester Lathes.
Replies: 9
Views: 1480

Colchester Lathes.

Must watch this, very interesting.
https://youtu.be/nQaAKUAzK0w
by armscor 1
Thu Jun 27, 2019 9:43 pm
Forum: General Discussion
Topic: Optimum lathes and mills
Replies: 4
Views: 1580

Re: Optimum lathes and mills

Hi fellow Sandgroper, also from Perth WA, been living in the Philippines for the last 15 years, could be facing the same dilemma, no idea for shipping costs for my machines and tooling.
by armscor 1
Thu Jun 27, 2019 4:44 pm
Forum: General Discussion
Topic: NOGA knock offs
Replies: 7
Views: 1860

Re: NOGA knock offs

There is no such thing as fully rigid in this world, a tongue in cheek engineer described when a fat Horsefly lands on a railway track it sags 1 millionth of an inch!! My mentor who taught me machining scolded me for leaning on the tailstock when machining between centres, everything moves when a fo...
by armscor 1
Thu Jun 27, 2019 2:29 am
Forum: General Discussion
Topic: NOGA knock offs
Replies: 7
Views: 1860

Re: NOGA knock offs

I have 3 Noga knock offs, perform faultlessly.
by armscor 1
Wed Jun 12, 2019 1:10 am
Forum: General Discussion
Topic: Large motors and soft start
Replies: 30
Views: 3830

Re: Large motors and soft start

Hi Harold, wish my Partner would mow the lawn!! Concur with John, you have a Delta/Delta motor wired for low voltage, Star Delta starting is out of the question. From the photo I have taken of my milling machine motor it is similar to yours, all my motors in the shop are configured this way, 220 VAC...
by armscor 1
Mon Jun 10, 2019 8:03 am
Forum: General Discussion
Topic: Large motors and soft start
Replies: 30
Views: 3830

Re: Large motors and soft start

Hi Harold, It is absolutely imperative to know what type of motor you have. 1, Does it have 6 terminals? 2, Is it configured for Star or Delta? Easy way to check is to isolate supply and remove terminal box cover, if 6 terminals and you have 2 links in series it is a Star connected motor and Star/De...
by armscor 1
Mon Jun 10, 2019 12:48 am
Forum: General Discussion
Topic: Large motors and soft start
Replies: 30
Views: 3830

Re: Large motors and soft start

Worked in an oil refinery where we had a GEC Alstolm 10 Mega Watt motor, 11KV, about 13000 HP driving a Sulzer axial blower supply air to our Cat Cracker, the beast was Direct on Line and we had to contact electric utility provider before starting so they were prepared for the sudden load change. I ...