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Member postings for Grotto

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

Thread: Dewhurst Switch 3 phase wiring
08/10/2018 08:35:38

Switch is rated 500v 3 phase.

I’ve wired it up and it works, but sometimes it tries to start the motor rotating the wrong way. Motor won’t start if belt on Myford is tight (need to have belt slack to start). Once motor is running it’s fine.

I’m wondering if I’ve got the R, W & B wires going to the motor around the wrong way?

05/10/2018 19:43:08


One section of cable (motor to switch) is older but looks to be in good condition & is in a metal sheath, so I’ll reuse it. Rest is more recent with a green earth wire.

I reckon I should have paid a bit more attention at school when we did electricity.

05/10/2018 08:33:03

hoping someone can help me with wiring up a Dewhurst switch.

I have 4 wires from socket;

L1 - Red

L2 - Blue

L3 - White

Earth - Black


Dewhurst switch has 8 terminals, 1-4 down one side, 4-8 on the other.

I did have photos of how it was wired (replaced motor with single phase) but can’t find photos anywhere! Now I’ve put the 3 phase motor back on but can’t work out wiring. I’ve had a hunt on the web but can’t find any diagrams which seem to match for 3 phase

Thread: What did you do Today 2018
14/09/2018 09:14:04

Nice work David!

I think I’ll make a couple those to replace some knurled ones which really don’t have enough grip.

Thread: New old 1950's Myford 7 Lathe still in the crate
10/09/2018 05:07:44

That auction site pretty much monopolises NZ.

There’s no eBay here, closest is Australia.

There’s even a few UK companies which sell on it

Thread: Kennedy Power Hacksaw Gaiter
09/09/2018 06:55:13

The conrod on mine is the same as pictured above, with only a clip where it attaches to the saw frame. There is some sideways play if you wiggle it, but not when it’s in operation.

The only problem I’ve ever had is a tendency for the large flywheel to move in towards frame, but I think I just need to replace the grub screw which should hold it in place.

Thread: Lubing my new mill
08/09/2018 07:24:19

Thanks, it’s a “Topone” Bridgeport style mill. Pretty much the same as a Bridgeport but head rotates on 2 axis.

Thread: Kennedy Power Hacksaw Gaiter
08/09/2018 03:18:50

Glad I read this thread. I’ve had one of these for years and always thought it was home built.

Where does the gaitor go? Mine has none. Also, is the tube with the damping mechanism meant to be filled with oil?

Thread: New old 1950's Myford 7 Lathe still in the crate
08/09/2018 03:09:15

I saw a oil in frame Bonneville in the crate for sale a few years back. It had changed hands a few times, with only the lid having been removed.

A panel beater and Triumph enthusiast down the road from me bought it so I went to have a look. He wouldn’t take it out as he reckoned the value would drop.

What a waste of a motorcycle, might as well have had a crate full of scrap metal. I kind of understand people having vehicles with only a few miles on the clock as display items. As least they’re nice to look at, but not don’t reckon a wooden crate is quite the same.

Hopefully someone will buy the lathe and use it.

Thread: Lubing my new mill
08/09/2018 03:00:04

Hi all

I’ve recently acquired a new mill but unfortunately the last page of the manual covering the lube system is missing.

I’ve found similar manual online but it’s pretty brief and doesn’t help a lot.

The mill has a manual “shot lubrication system” which appears to oil the ways. The book recommends Sunco Waylube #80 for ways. A bit of google research appears to say ISO68 hydraulic fluid is the same. Does this sound correct? (Photo is rotated 90 degrees)



Should I just fill the tank with this? How frequently should I pump the handle and how many times?

There are also grease nipples but I’m unsure if these are for grease or oil and can’t find any reference in the manual to them or any indication of what to squirt in?


There are also some oil caps, but like the grease nipple I’m not sure what to use in them, there are quite a few - should I guess they all take same lubricant?


Sorry about photos, I haven’t worked out how to get them the right way up.

Thread: What did you do Today 2018
31/08/2018 08:12:01

Got my 3 phase converter (rotary?) installed today. Had done all the cabling but needed a qualified electrician to hook it up.

I was expecting the converter to be a bit noisy, but you can hardly hear it running.

I can now use my mill which has been sitting for a week, unbelievably pleased, it far exceeds all my expectations. I really need to get it into position (it’s currently sitting on a pallet in the middle of the garage) but that can wait a day or two.

Can also put the 3 phase motor back on my Myford (have been running a pretty dodgy single phase which sparks a bit).

Overall an exceptionally good day

Thread: Calling all Kiwis
22/08/2018 07:34:24

I've bought thread coils from Aliexpress (not M3) which seemed fine.

I still can't understand how I can buy stuff with free shipping from China (to NZ) for less than the cost of postage from supplier in the same city as me. Someone told me China is classed as a 3rd world country so they get free postage, but that doesn't sound right.

Postage can be a little slow, but often I receive stuff within 7-10 days

Thread: New Mill
21/08/2018 06:44:35

After a few years of looking I finally found a decent mill I could afford.

I went and had a look at it, seemed like it was in really good condition, but more importantly the guy selling it was a really nice retired engineer (I tend to judge things more by the person selling as I'm no expert judging machines).

Had a bit of heart fade when it was delivered, as it looked much smaller in his empty workshop, and was too high to get in my garage/workshop, but tilting the head 90 degrees it just squeezed in.

Getting it plumbed in tomorrow, but it will take a few days to move everything around and get it into position (unless I can convince my wife to park on the street).

Thread: Dickson QCTP Holders
21/08/2018 04:36:44

I'm also planning to have a crack at making some.

I bought some from AR which are great. Topped up with a few more from RDG or Chronos, but there was a fair amount of variability between them, some perfect, others not so. The AR ones are much harder steel which is good unless you want to mill a bit off them so you can use 12mm shank tools.

Videos make it look so easy, but from experience it never turns out that way (for me).

Thread: RF-35 Mill/Drill
16/08/2018 03:49:05

Hi George

I'll post some photos when I pick it up next week.

The rear tool post height is too high (unless for some weird reason my ML7 chuck is too low). Chronos did offer to refund/replace if I returned it, but postage (from NZ) was too expensive for me to bother. My first project when I get the mill is to take a tad off the bottom of the tool post to correct this.

I've been using a HSS blade in it which I've ground to be the correct height when fitted. It works surprisingly well given my lack of experience/skill at tool grinding.

15/08/2018 01:07:32

Thanks guys

Sudden change of plans.

Having decided to buy the RF-35, I saw a Bridgeport clone for sale, and ended up buying that instead.

Quite a bit more expensive, but it comes with a load of tooling and accessories.

Hopefully I'll never need to upgrade.

No doubt I'll have a bunch of questions once it's installed & running.

13/08/2018 07:08:58

Thanks, I've found loads of RF mill drills, but not a RF-35.

It's a round column, but looks more like a RF-45.

The screw for the power feed head looks like it would keep head concentric when moved up or down.

13/08/2018 04:49:52

img_3092.jpgI've been looking for a millimg machine for a couple of years. I was hoping to get a Bridgeport or similar, but the ones I can afford all seem to be extremely well used.

I've seen a Rong Fu RF-35 round column mill/drill which looks like it hasn't been abused, and has a verical power feed which appears to stop head rotating when it's adfjusted up/down (although I don't think the stuff I use it for will neccessitate this).

When I google RF-35 I only seem to get results for Radial Drills.

I wondered if anyoner had come across one of these, and if so are they any good?


Thread: Myford cross slide bearing mod
01/01/2018 02:14:03

Thanks for that,

I've ordered some bearings, and when they arrive will have a go at modifying cross slide & vertical slide.

Probably be back with a few questions!

29/12/2017 02:47:01

Checked the housing on my vertical nslide and it's a different size, so I guess that's not an option...

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