View Profile: wombat2go - The Home Shop Machinist & Machinist's Workshop Magazine's BBS

Yesterday, 02:26 PM

wombat2go replied to a thread Lawn mower repair and maintenance in General

JT: You are right. This Bolens tractor is being used increasingly for snow clearing around the neighborhood driveways and sidewalks. Even though...

47 replies | 2034 view(s)

Yesterday, 11:20 AM

wombat2go replied to a thread Lawn mower repair and maintenance in General

Yesterday I found a flat rear on the lawn tractor . A crack along the side of the tread, and both tires were cracked. The local tire shop is fitting...

47 replies | 2034 view(s)

04-19-2018, 08:35 AM

wombat2go replied to a thread OT: Locating buried PVC water line in General

Can you maintain turbulent flow in the pipe for a test period? If so, you might be able to detect it with a detector similar to an electret...

31 replies | 1848 view(s)

04-18-2018, 02:13 PM

wombat2go replied to a thread Buying goods From Britian in General

I have been buying items from RDGtools.co.uk for my SB9 ( eg metric tools, QCTP and digital indicator.) So far the total prices including shipping...

34 replies | 1550 view(s)

04-18-2018, 11:34 AM

wombat2go replied to a thread VFD Braking Resistors - another question. in General

This effect ( DC injection) was a problem back in the days of the early induction motor vfds based on scrs with forced commutation by capacitors....

40 replies | 1283 view(s)

04-14-2018, 01:49 PM

wombat2go replied to a thread What material OT? in General

Yes, maybe try a kitchen countertop provider. We did the kitchen with 2 pieces of granite they called "offcuts" , cut and polished and installed...

23 replies | 1036 view(s)

04-11-2018, 04:19 PM

wombat2go replied to a thread A Delrin Question in General

I have made a few parts for vintage cameras out of 63mm acetal black solid bar on the lathe. https://app.box.com/s/5xc8mpmbejud8n56g15tycbwz6avu3uf...

8 replies | 619 view(s)

04-11-2018, 10:30 AM

wombat2go replied to a thread Parting stainless tube??? in General

I was cutting bike tubing by holding in the milling attachment with the long stock extending down tailstock way. The slitting saw was on arbor. It...

25 replies | 1038 view(s)

04-10-2018, 10:32 AM

wombat2go replied to a thread Deburring gear teeth in General

Here is a macro of the teeth surface on a new (in 2014) mitre gear pinion: https://app.box.com/s/8fh7sof1qmmki8o64q05r0y38xgt536w After 4 years...

8 replies | 462 view(s)

04-02-2018, 11:31 AM

wombat2go replied to a thread Shrinking Sheet Metal- Fixing Oil canning. in General

As a last resort, and after a test on a coupon, cut a slot and then tack weld across the centre of the slot so that the tack pulls the slot together...

33 replies | 2603 view(s)

04-02-2018, 12:32 AM

wombat2go replied to a thread Cycling rarely used electronics question in General

Hi PSTech From my experience with water cooling, , industrial silicon semiconductors paralleled will be sized for continuous duty ( 24/7)at a...

22 replies | 1522 view(s)

04-01-2018, 04:28 PM

wombat2go replied to a thread gasket hole puncher? in General

Yes, Wad punch sets cost little: https://www.amazon.com/wad-punch/s?ie=UTF8&page=1&rh=i%3Aaps%2Ck%3Awad%20punch One time I made a wad punch out...

19 replies | 1748 view(s)

04-01-2018, 11:24 AM

wombat2go replied to a thread Cycling rarely used electronics question in General

Forest, Thanks, that is a very good resource for those of with interest in old gear. I read in it that the little pcb mount electros are better...

22 replies | 1522 view(s)

03-30-2018, 01:55 PM

wombat2go replied to a thread Cycling rarely used electronics question in General

Block IGBTs were being parallelled in induction heating by USA Japan and EU manufacturers and I think in motor drives ( maybe even traction) since...

22 replies | 1522 view(s)

03-30-2018, 01:03 PM

wombat2go replied to a thread Cycling rarely used electronics question in General

Hi JT, Your info above about IGBT sharing temp coefficients is out of date? Refer to Vce_sat versus temp for this Misubishi IGBT...

22 replies | 1522 view(s)

03-30-2018, 10:18 AM

wombat2go replied to a thread Shaper tooling, new keyway tool. in General

I was wondering about doing closed end keyways by shaper and found these tips:...

10 replies | 1138 view(s)

03-30-2018, 09:44 AM

wombat2go replied to a thread Cycling rarely used electronics question in General

It is common in Low Voltage inverters that the IGBTs will be parallelled and sharing. Sharing is an attribute of IGBT compared to some other...

22 replies | 1522 view(s)

03-30-2018, 09:11 AM

wombat2go replied to a thread Vibration Damping? in General

Vibration through concrete 20 ft away, +A balcony in condo, +A machine tool in condo. That reminds me of staying in hotels where they renovate one...

18 replies | 2400 view(s)

03-24-2018, 11:42 AM

wombat2go replied to a thread OT: The Cops are coming call from 914-363-5512 in General

https://www.shouldianswer.com/ I am using this one. The users can block and allow the scam calls to go to voicemail. Then listen to the first...

42 replies | 5438 view(s)

03-23-2018, 09:48 PM

wombat2go replied to a thread cost of cutting in Home Shop Welding

hi Wm, they are 2016 & 2017 retail prices, less Michigan sales tax, in my "customer owned" exchanged cylinders. In 2017 I went to the Acetylene in...

15 replies | 959 view(s)

03-23-2018, 10:50 AM

wombat2go replied to a thread cost of cutting in Home Shop Welding

Acetylene refill here is $11.30 retail for 1 cylinder of 10 Standard cubic foot. Oxygen is $15.30 for 1 cylinder of 20 Standard cubic foot. They...

15 replies | 959 view(s)

03-21-2018, 04:58 PM

wombat2go replied to a thread How do you measure the INSIDE of a bottle? in General

Yes Greg, could also be a home brew magnetic method: Make 2 ferrite cored cylindrical coils of diameter about the wall thickness. The outer coil...

23 replies | 2179 view(s)

03-21-2018, 02:50 PM

wombat2go replied to a thread OT: Computer/WiFi Tips in General

I read this thread and it reminded me to look at a problem that happened last week. The office LAN switch failed, and at about the same time...

39 replies | 3294 view(s)

03-19-2018, 10:34 AM

wombat2go replied to a thread see this! what do you think ON TOPIC in General

The parent metal pieces were galvanized steel. Even though the zinc was ground off, under the zinc are 3 layers of Zn rich iron-zinc alloys....

8 replies | 1079 view(s)

03-17-2018, 02:29 PM

wombat2go replied to a thread Stainless fasteners, going into Stainless material. in General

Stainless still used today. Purchased in bulk qty from industrial suppliers. I will ask some of my buddies about it.

52 replies | 2860 view(s)

03-17-2018, 01:22 PM

wombat2go replied to a thread Stainless fasteners, going into Stainless material. in General

I think the problem is being overstated a bit here. I worked with mainly stainless fasteners for over 30 years. I recall a few times when galled...

52 replies | 2860 view(s)

03-17-2018, 10:24 AM

wombat2go replied to a thread Stainless fasteners, going into Stainless material. in General

I can imagine problems if a consumer not familiar with the torque ranges tries to tighten an M6 ( or 1/4-20) ss nut/bolt using a big crescent wrench...

52 replies | 2860 view(s)

03-11-2018, 02:54 PM

wombat2go replied to a thread Import Steel Quality in General

Hot rolled steel is also referred to as hot wrought. Surface finish is not specified or graded in hot rolled....

33 replies | 2341 view(s)

03-09-2018, 12:43 PM

wombat2go replied to a thread How Do These Bolts Work ??? in General

These scr clamps use an indicator of the deflection of the spring bar between the bolts. This one has range 6000 pound-f . They are re-usable and...

110 replies | 5637 view(s)