A short video to help Steve (buckrun11) in Ohio to measure his lathe lead screw pitch.
Пікірлер: 72
@robertdebusk61573 жыл бұрын
Thank you Tom, for helping a brother in need. Bob
@littlestworkshop10 жыл бұрын
Or turn leadscrew one turn manually and measure the travel of the carriage with a dial gauge. See if fits a metric pitch and also divide into an inch to see if it is an imperial one.
@RRINTHESHOP10 жыл бұрын
Tom, thanks again for the great video. I see many god ideas in the comments. Here is an easy one. Engage the half nut, rotate the chuck by hand a few turns to remove any backlash, make a sharpie mark on the ways, rotate the chuck and count the # of revolutions of the lead screw, then measure how far the carriage moved along the ways. Pitch is a measurement of distance traveled per revolution. Your lathe carriage travels 0.25" per rev. for a pitch of 4 TPI. Just offering another idea. Thanks again.
@thorweldinginnovations61674 жыл бұрын
An easy way to ID the leadscrew is to count 10 threads and measure the length in mm and compare this to how close the threads fit into 1". 10 threads of 6mm will give exactly 60mm or 4 mm threads will be 40mm. Threads will start and finish on the same place on the thread pitch. An imperial thread will start and finish at the exact same position of the thread pitch when measuring over 1" and will be off when measuring over 10 threads.
@GaWajn10 жыл бұрын
I like it that you took time to help another person with a youtube visual. That way we can all follow the investigation. Thanks!
@علي202410 жыл бұрын
Sir tom i do appriciate ur efforts u got really a good experiance wish u all the best .
@wyattoneable10 жыл бұрын
If I could hit the "like" button a thousand times I'd do it on this video for sure. It was very nice to take some time out to help Steve...and me too. I'll remember this when I get a lathe of my own.
@oxtoolco10 жыл бұрын
Hey Wyatt, Lots of other things to click on to help out. Thanks for the positive feedback. Cheers, Tom
@CruiserMac10 жыл бұрын
Very informative Tom, nice of you to help out a viewer.
@swarfrat31110 жыл бұрын
Hey Tom, Good information to know, from the guy that knows! Regards, Oxen Dave
@EVguru10 жыл бұрын
Hi Tom, The cut threads were apparently coming out OK, it's just the threading dial that's behaving strangely. The threading dial was fitted with a 15 tooth gear (meant for metric), now it has a 16 tooth. I'm beginning to wonder if the saddle isn't fitted with metric half nuts that are only partly engaging with an imperial leadscrew. I think we need to see dial gauge readings whilst the leadscrew is rotated whole turns.
@daque196010 жыл бұрын
Only thing I could suggest is maybe measure over a larger distance and only if you really don't know if it's English or metric.. Most dial calipers are 6" plus so maybe measure over 5 inches and divided 5 by the thread count. To check if it's metric I would switch to mm and measure threads in 100 mm the same way. Probably more work than is needed for this but averages out minor error you might get with no real point on acme threads.
@redman00710010 жыл бұрын
Hi Tom,really enjoy ur vid's.Thank's Terrence
@gestoriaradicacionradicaci93152 жыл бұрын
Thank Sir for share.you knowledge
@jusb106610 жыл бұрын
i think its a good idea to measure more than one peak to peak, as you did, you measured 4, he may want to measure 10 perhaps, and thus gain a more accurate measure of the pitch, one can more easily lead to error
@AmateurRedneckWorkshop10 жыл бұрын
Short and sweet huh? Still a good video and helpful to lots of people.
@mikeadrover517310 жыл бұрын
As always, thanks’ for taking the time to make this video! And I support this site. ~M~
@MarkHinchey14 жыл бұрын
Welcome back dog stools! Gotta love auto generated captions.
@ce208b210 жыл бұрын
the guy over at the AppliedScience channel had a similar problem on his Grizzly 4003g lathe. He has a review video of the lathe. He says that Grizzly shipped his lathe with a 15 tooth thread counting gear designed for a metric lathe and it should have been a 16 tooth gear.
@heatherx107110 жыл бұрын
Hey Tom I have a grizzly g4003g lathe also the lead is .864 in and I believe it is 9tpi. The thread chaser has 16 teeth. A friend of mine was having the same problem and it turned out they had installed a metric gear I think it was like 22 teeth she called them and they promptly mailed her the correct gear.
@lesthompson59072 жыл бұрын
hi Mr OXTOOLCO? , this question is one that need a bit of explaining i wuld love to hear your tack of the subject . I think it an interesting , subject. & as potential for grat development in the CNC Domain To , On with the suggest! , i live in England & own one of the UK School lathe's . it about 150 years old it as the ability to cut threads up to 4 treads to the inch , & as small as 50 to the inch. but it as no lead screw. & it perimetry . screwing drive . is the rack. I would love to fit a tread dial .So i no longer need to time the lathe to cut a tread ? Now the Question is wuld it be best to fit a sliding free turning Keyed sleeve as 8 thread's to the Inch Or an appropriate gear that rid on the rack tuning a Dial ? At present i ues a rotter & thread mill to cut the small threads in it appropriate gear seclusion on the banjo but single point therein still avails me as i cant start the tread consecutively in the same place without trading diel . is it possible you can cover this on a video to whach . [ Les in England] IV Raised the subject with so meny But they never Respond ?. thank you preps you will the German cheapy Stephon came up with using the third mill siystom. it work's well very well for small trad's But i won't to cut a Spindale tread for my lathe to mount a chuck plate . & wuld lick to single point thread it , we There's my problem can you help ? whit an ideal Some clarity . my drive spindle is Like a Milford Lath led screw, but with out the third my idea was to fit a sliding thread which is keyed ? & mount a diel to that ? Well their you have it what do you think ?
@erynthegrey10 жыл бұрын
If it has a threading dial, it's should an SAE thread, right? My thought is that metric threading half-nut is never disengaged, thus renderin thread dial as unneccesary. Did he give the model of the Grizzly lathe? Should be be easy to track on the grizzly website. My lathe is Chinese and has an SAE thread lead screw and a threading dial.
@EVguru10 жыл бұрын
Metric lathes have threading dials too! It's only the special case of cutting a non-native thread; metric with an imperial leadscrew, or imperial with metric, etc. that means the half nuts can't be disengaged without special techniques.
@erynthegrey10 жыл бұрын
Cool. Never knew. Thanks.
@chrisstephens667310 жыл бұрын
Paul Compton Hi Paul, my metric Colchester Bantam has no threading dial, one would only be needed for threads that are not a factor of 6mm, as the half nuts can be engaged anywhere. For non factors, or Imp threads, a "clapper box" threading tool saves the day. ATB chris
@thedge710 жыл бұрын
It would be interesting to have a discussion about what features are desirable in a lathe. For instance is a larger dia. lead screw better than a smaller one? something along those lines. For prospective buyers.
@zyzzz6331 Жыл бұрын
What type of thread is it? Square thread?
@buddylineman10 жыл бұрын
Hey Tom, I have a grizzly G4003 lathe I don't know if I can help but I would be happy to try. Thanks for all your videos. Buddy
@lordmcted9 жыл бұрын
heya tom, i love your videos, a lot, you're one of the best people on youtube to watch and listen to, especially the detail you go into the way i go with this, is if i set a caliper to 1 inch, and it lands even on the threads, its inch, if not, its metric i mean, if we're trying to find out if the shoe fits, just check if the shoe fits
@oxtoolco9 жыл бұрын
+lordmcted Hi Lord, That works if all you care about is if the leadscrew is inch or metric. This video was created to help a friend that was having some difficulty determining the number of threads per inch. Thanks for the comment. Cheers, Tom
@lordmcted9 жыл бұрын
oh right, my bad, sorry about that, i must have missed that part, i was tired and covered in oil and crud- nothing worse than a know it all who's not even on the right track, sorry again. great videos and thank you for sharing them and the time you put in, also thank you for responding to my comment. all the best, take care
@gentharris10 жыл бұрын
Sounds more like 10 tpi to me which IS very close to 2.5 mm I have a small Grizzly lathe that is 16 tpi threading screw, the cross slide, compound and tailstock are all 20 tpi. I think that it is very unlikely that he has a metric leadscrew, unless the machine was not made for the US market?
@katzefrau110 жыл бұрын
Hey Thom. I have a Grizzly G4003G lathe. the lead screw is .864 inch and it is 8TPI . a friend of mine had the same problem with her Grizzly lathe and it turned out she had the wrong gear from the factory it was like 22 teeth or something and they do offer a metric lead screw. the correct gear for the G4003g for imperial measurement is 16tooth. I don't know if he has a G4003g but its the most common one so I'm hoping this will help.
@dalescott457010 жыл бұрын
Most of the Chinese lathes have a suffix "b" on the model number for metric leadscrew
@gichehasimon3 жыл бұрын
Hello Tom, Thanks for you great educational videos, I bought a drilling coupling that was indicated as T48*10, its a metric threads, i need to thread a joining drop pipe for it but am not sure what kind of thread that is. hope you have ideas you can help me out. The diameter of the coupling is 60mm and thread diameter is T48mm*10
@paulperrin21523 жыл бұрын
Some are stamped on the lead screw
@Muscle65car10 жыл бұрын
Also on the Grizzly 4003 you have to set compound to 59 deg on the scale not 29 deg.
@weaponstester89764 жыл бұрын
I thought u put the tread gauge in between the treads
@krazziee200010 жыл бұрын
good info , thanks
@andregross742010 жыл бұрын
Siege the makers of import machinery messed up the thread chasing dial on a lot of machines one time. Assembling them with a gear with one fewer teeth giving you false readings. Ben Krasnaw at Applied Scoence here on YT explains this in his grizzly 4003G lathe review.
@keldsor10 жыл бұрын
Hi Tom ! How did you know I was going to do exactly that, because I'm going to make a thread dial for my old Stanko lathe - thx !
@VijayKumar-vz5vb6 жыл бұрын
Hi
@johnatonince76795 жыл бұрын
Please help me out I'm going crazy trying to find the thread pitch on my 7x12 sunmore mini lathe leadscrew?? I see 16mm of diameter when I use my caliper and I use those SAE pitch measures for the threads and the only one that fits is 1.6 S.A.E! What is the name of the Tap or Die I'm looking for on this leadscrew???
@RaysGarage10 жыл бұрын
Tom, Great info! If it would help, I have a Grizzly G0709 14"X40" with a 8 TPI X .875" Dia Lead Screw. Thanks, Ray
@oxtoolco10 жыл бұрын
Hey Ray, Steve needs to work through this problem. What is the optional metric lead screw pitch? Is it shown in your manual? Cheers, Tom
@RaysGarage10 жыл бұрын
oxtoolco Hi Tom, I checked my manual, the only option was the one that came on my lathe, (Cuts 4-112 Standard TPI and 0.1-7 Metric, 7/8" Dia 8 TPI). Not sure if Grizzly sells a lathe with a metric lead screw as an option. I would have him contact Grizzly Tech Support and tell them of the issue. Could also be a half nut, or clocking gear issue... Maybe we can cut him a new Inch lead screw as a last resort??? ATB, Ray
@telosfd7 жыл бұрын
What going on with the lathes or the other machinery tools that made for the imperial system, how to change in metric, or no!
@user-bw4rr4kd9n7 жыл бұрын
Awsome video, very helpfull. Can i ask please, i mesured my lead screw from my uknown lathe and it come to 6,5 pitch and 30mm(exaclty) at diameter. I am trying to find a split nut but i cant so i cannot use the lathe for cutting thread nor feeding. Any ideas how to overcome my problem? Thank you!!
@oxtoolco7 жыл бұрын
Sorry to hear you have no split nut. You will most likely need to make a nut on another lathe. Another option would be to find a nut that fits your lead screw and somehow adapt it to reference to the carriage. Thanks for the comment. Cheers, Tom
@black5f3 жыл бұрын
Good video. If it's a 2.5mm pitch then 10 threads will be 25mm, 10 tpi will be 25.4 which will be hard to spot measuring in the center. Carefully measure the width of the top of a peak ... on a acme thread relatively easy? Now carefully zero your digital calipers. Now measure across say 10 threads from left side of peak to right side of peak ... not the centers, it's easier than the centre. Your calipers are zeroed at the width of a peak so will automatically deduct 1/2 width at either end? 6 inch caliper you can measure across 60 threads ... the difference should be 2.4mm less if it's a metric thread 2.5 pitch (61 threads (very nearly) per 6 inches?). Or with a 6 inch rule there will be either 60 threads or 61? On medium size metric lathes, 10 or 11inch swing, 3mm pitch is very common.
@Gottenhimfella2 жыл бұрын
I'm not sure why Tom didn't simply measure from left corner to left corner. Then there's no need either to factor in the width, or to guess the centre positions.
@clayz13 жыл бұрын
Count the full threads plus the two halves? Just count the spaces. Dont complicate it.
@alhagopian21007 жыл бұрын
Hi Tom Love your videos. Machining is new to me. I picked up a South bend fourteen lathe but it did not come with thread dial. I picked 1 up on e-bay that will fit but the gear is not right. I have a 1" 6TPI lead screw. Can you help me figure out what gear I need to make this work? Thanks Al
@desmondallen62926 жыл бұрын
Al Hagopian
@MrJTJINX6 жыл бұрын
Hi Tom, how does this work for miltu start acme threads. ive just taken my old Elliott 181 Milling machine apart to look at repairing a backlash issue in its x axis. Its probably an imperial thread. Just curious as the DIY CNC plasma table i built has 16mm twin start acme threads, how do do go about measuring them - at first glance if the ends were hidden by machine mechanics, all you see is what looks like a normal acme thread.
@Gottenhimfella2 жыл бұрын
Turn the leadscrew exactly ten turns and measure the movement of the table resulting. Divide that by ten times the pitch to get the number of starts
@hettinger10007 жыл бұрын
Hi Tom, I've got a 12 inch Clausing lathe that had a well worn split nut and a homemade leadscrew and I finally finished wearing the split nut out. I bought a new split nut from Clausing, but it doesn't work with the homemade leadscrew. (too tigxht) When I looked in Machinery's Handbook, the Acme threads for my size screw don't seem to exist. The Clausing one is 7/8" X 8 tpi. These are no longer available from the company. The one on my lathe didn't have the threads cut deep enough and they really don't look that good anyway. My hope was to find some 7/8" Acme allthread and make another one, but can find only 6 tpi. Is there somewhere you're aware of that might have what I need? Thanks
@oxtoolco7 жыл бұрын
Hi Ed, Try Horspool and Romine in Oakland CA. They do all kinds of acme stuff. Thanks for the comment. Cheers, Tom
@hettinger10007 жыл бұрын
Thanks Tom, We also found an outfit called Green Bay something or other and they also had what we needed. $28 per ft in cut lengths of 4140 of the 7/8 x 8tpi.
@MaulTechATV10 жыл бұрын
I think a 2.5mm pitch is the same as a 10 thread per inch. Going to be hard to figure out which one it is if so.
@daque196010 жыл бұрын
That's why I suggested measuring the threads in 100 MM and 5 inches, if its metric you get 40 right on the button, if its English you get 39 and a bit more. If you measure the threads in 5 inches and its 10 per inch you get 50 right on the button, if its really metric you get 50.8 or almost 51.
@garthn25619 жыл бұрын
MaulTechATV Measure the entire leadscrew - the more peaks included, the easier it gets - besides the counting.
@ricardomolina87735 жыл бұрын
Where can I get a large threaded rod like that Large enough where I can A large CNC machine to build boats
@vrsarojcomedyvlogs4 жыл бұрын
Nice information sir I'm from india
@jarisipilainen38755 жыл бұрын
more acurate measure over 10 pitch. you see is it metric or inch right away.10mm its 1pitch metric. 15mm 1.5 metric 20mm 2 pitxh 25mm 2.5
@saleemfarooqi78986 жыл бұрын
v v good 👍
@guilhermemassote702 жыл бұрын
Legenda em potuguês
@iraqresitance96633 жыл бұрын
My greeting from iraq
@GodsBattleAx4 жыл бұрын
This didnt say anything, if you dont have a thread gauge..
@user-kh8pu2sr5f4 жыл бұрын
جميل
@rocklives125 жыл бұрын
Wouldn't be such a headache if everyone used metric 😭