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Member postings for XD 351

Here is a list of all the postings XD 351 has made in our forums. Click on a thread name to jump to the thread.

Thread: Need to drill a hole digital caliper
08/06/2019 01:23:49

Bunnings sell a carbide tipped drill set that will drill metal ,i bought a set out of curiosity and they were not expensive .

if you want to try again with a HSS drill slow speed , cutting fluid and lean on the drill a little so it doesn’t rub .

Thread: My Father gave me this yesterday, no experience with engines, thought you guys could help.
05/06/2019 09:01:08

Cat looks like it is stuffed already! !Either that or a lion just walked into the room !

Thread: Antikythera mechanism
04/06/2019 01:35:53
This is a series on building the mechanism , Clickspring ( aka Chris ) uses old time and modern techniques to make it .
Thread: What are you using for Lathe Way Oil?
02/06/2019 14:29:00

Chain bar oil on everything except the gearbox .

Thread: How often do you oil your lathe ways?
02/06/2019 08:44:55
Posted by Blue Heeler on 01/06/2019 22:14:47:
Posted by XD 351 on 01/06/2019 10:47:24:hopefully put an end to the painting on of a thick coat of lanotec to stop rusting in winter as the condensation can be horrific in winter here in western Sydney.

XD what causes this condensation? I get it in my shed about two months of the year as well. Usually in the dead of winter July/August I'll go into my shed and everything metal will be dripping/sweating with beads of water?

I setup two fans on timers to go all night and this alleviates it.

Moist air (high humidity),high dew point temp , cold air temperatures followed by a rise in temperature which means the machine can’t warm up as fast as the air around it .

to stop it you either lower the humidity or keep the machine warm .


01/06/2019 12:14:38

Hi Dave ,

Not wanting to drag this post off topic i have sent you a PM .


Thread: Rejects for Sale.
01/06/2019 11:52:12

I have been playing with digital humidity and temperature sensors and purchased some SHT10 Units off ebay, had a terrible time getting them to work so looked up the spec sheet and found the 10k resistor was missing off the board . I don’t know if this was a fault or designed that way but it sure would have saved me some hair pulling if the seller had have let me know. Ebay need to seriously clean up their act and sort out the sellers that say they are in your country but are really in China .

Thread: Which Qctp for mini lathe?
01/06/2019 11:24:22

The cross slide and its mounting system are fairly flimsy and flex a lot under heavy load so if something is going to break i would rather it to be the toolpost or holder . There is an old saying here in Australia - there is no use building a brick sh*thouse on a bark canoe !

Thread: Ball and Radius Turning Tool
01/06/2019 11:01:23

You can also use a boring head mounted in the toolpost to make a radius tool , the fine adjustment makes setting up a bit easier .

Thread: Extreme turning
01/06/2019 10:53:05

The motor would have been feeling the punishment that day !

Who said little lathes cant turn big things!

Thread: How often do you oil your lathe ways?
01/06/2019 10:47:24

I have a slightly different regime as i tend to use my machines on weekends mostly so i usually do a clean up on Sunday or Monday then wipe the shiny bits down with lanotec to stop any rusting and this means i have to clean that off before i use the machine - i use cheap spray degreaser ( repco or supacheap etc) and this means i have to oil the bed before use . You can never apply to much oil to a machine and i use chain bar oil, its cheap , it works , it sticks in there and it don’t stink . If I’m machining cast iron i wipe the machine down so the only oil is between the carriage and bed - cast iron dust and oil = grinding paste !

I’m currently working on a mini dehumidifier for one of my lathes using a peltier module and the arduino code that was described by Silly old duffer in a past issue of MEW, so far results look promising but testing has been hindered by dry - low humidity weather . If it works it will hopefully put an end to the painting on of a thick coat of lanotec to stop rusting in winter as the condensation can be horrific in winter here in western Sydney.

Thread: Which Qctp for mini lathe?
31/05/2019 11:58:15

The A2Z is all alloy and i have had no probs

Thread: Taking Chinese 3 Jaw Metal Lathe chuck apart for cleaning
31/05/2019 06:06:02
Posted by Blue Heeler on 31/05/2019 01:57:06:

Amazing how useful toothbrushes are for the workshop!

Just got to remember to use hers & not yours 😁.

I use either chain lube for motor bikes or tac2 spray to lube my chucks and back gears of my lathe because it is designed to not fling off . - i used to use a 3 jaw mostly but mostly use four jaw now except for machining hex stock which is fairly rarely .

Thread: Which Qctp for mini lathe?
31/05/2019 05:35:35

I use one of these and the Chinese knock off is available just about everywhere .


Thread: My Lathe Dog
31/05/2019 05:10:44
Posted by Blue Heeler on 30/05/2019 09:48:16:

You’re not getting anywhere near this lathe until you take me for a walk !

Thread: Thread Pitch Info.
20/05/2019 08:39:09

Here are a few others i have found useful.

Job Shop Machinist Lite by Matthew Moore

Fraction Converter Calculator by Intemodino Group s.r.o.

Fraction Calculator + Decimals by Visual Math Interactive Sdn. Bhd.

iEngineer by Perfectly Simple Apps LLC

FSWizard by Eldar Gerfanov

Convert Any Unit by Cider Software LLC

Kyocera Cutting Tools by The Pinnacles Interactive Pte Ltd

Sandvik Coromant Publications by Sandvik Coromant

I have no personal links to any of these apps i started using them when my shop calc calculator died and i didnt want to fork out $100au + for a new one especially when i had an old ipad that still work fine and i can choose what apps i put on it . Some of these apps have a pro version where you pay a small one off fee to purchase it , they sometimes unlock a few more features and get rid of the ads.


20/05/2019 08:22:04

I just typed in hague thread in the app store search panel but try this link .

Hague Screw Thread Calculator by Hague Fasteners Ltd


20/05/2019 05:16:35

Just for those who are interested i found the hague thread calculator app for ipad/phone has a listing for this thread , it also does many other odd threads like UNEF , UNS etc and it is free .these days i use my old ipad exclusively for these apps as it saves a lot of time that would be wasted rummaging around looking through books . Unfortunately it doesn’t seem to be available for android phones .

19/05/2019 14:34:15

3. The formula below will give you the single depth for undertaking unified threads:

d = P x 0.750

Where d = Single Depth

P = Pitch

n = Number of threads per inch (TPI)

Infeed Depth = .75 / n


To cut a correct thread on the lathe, it is necessary first to make calculations so that the thread will have proper dimensions. The following diagrams and formulas will be helpful when calculating thread dimensions.

Example: Calculate the pitch, depth, minor diameter, and width of flat for a ¾-10 NC thread.

P = 1 / n = 1 / 10 = 0.100 in.

Depth = .7500 x Pitch = .7500 x .100 = .0750 in.

Minor Diameter = Major Diameter – (D + D) = .750 – (.075 + .075) = 0.600 in.

Width of Flat = P / 8 = (1 / 8) x (1/10) = .0125 in.

Edited By XD 351 on 19/05/2019 14:35:08

Thread: radius on end of bar
15/05/2019 14:47:53

Mew #279 - page 55 , photo 119 milling for beginners shows a boring head being used to machine a concave radius in a piece of alloy , you could use the same principle .

A more difficult thing is indexing the now formed radius to the slots and tapped holes then forming the 77mm radius on the outside of the spigot . I’m sure there will be others along soon with a few more suggestions so be patient !.


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