NOTE: At 6:30, where I discuss pitch diameters, there is a transcription error. I show 76 / 50.8 = 1.5354. It should be 1.496. However the end result of 38mm is correct.
Hi Andrew , another excellent video. Those flywheels will look the part. I've been looking for some 3 1/2in ones for the Kerzel engine but not having much luck so will probably have to machine a pair. The more I read the 'Machinery's Handbook' the more respect I have for engineers. Theres just so much to this hobby. Regards Kevin
Hi Kevin. It's definately a mindblowing subject. My father was a draughsman and in those days he had to manually draw gears. His old version of the book still has some valuable info not covered in my new one. Good luck with the flywheels. I just couldn't face trying to machine two 6" ones - though lots of people do. The plans show the centre boss sticking out beyond the outer rim - so I think I might need to do some kind of modification. All the best. Andrew
Really enjoyed this one Andrew. Your thinking and working out to solve the gear distance problem was a great lesson to us all. I suppose with hindsight you would have set up the shafts before drilling to check the clearance. I am intrigued by hit and miss governors. It will be fascinating to see its mysteries unfold as you progress. That Machinists Handbook is quite a tome! Plenty of light reading for you in there. The engine will look really good with that chunky pair of flywheels. They should also give all the inertia you need to keep her ticking over.
Thanks Tim. Second time round it occurred to me too that it would have been better me setting up the shafts first time round. Hey ho, I learn best by making mistakes - hopefully I will remember next time. Yeah - those flywheels look the business. Cheers Andrew
Another lovely video. I got some of those Chinese hit and miss engines from banggood to play with and found that a cheap (Harbor Freight) 6 in 1 screwdriver I had was the perfect size socket to get the little spark plug out. If you get to fitting the spark plug and have issues finding a low clearance socket, you can try that. I think the Farm Boy plans use the same plug
Another great video Andrew, and thanks for the mention. I'm almost done with my flywheels and I estimate they took about 40 hours to machine from stock discs, so you did yourself a favour buying those castings. I'm not happy with my gears but I think they'll work okay - yours look much better than mine. As a matter of fact those gears are the reason I'm building a Farm Boy. I wanted to try making gears and bought a set of involute gear cutters and wanted to make a couple of gears for practice. I'd bought the Farm Boy drawings about three years ago when I set up my home machine shop and back then building it was a bit too advanced for me, but by the time I bought the gear cutters this year my skills had improved so I decided to have a go at making the gears. When they were completed I made a couple more parts and ultimately decided to make the entire engine. I just have to finish chamfering the flywheel spokes and then make the fuel mixer and hopefully I can make it "chooch" as AvE would say.
No worries mate. I pretty much followed your footsteps. I always (over the past couple of years) fancied having a go at making some gears, so that was the first thing I tackled on the Farm Boy. I didn't realise just how much work is needed to build the rest of it. It's a really good way to help develop your engineering skills though - lots of variety and challenges along the way. I would be interested in seeing a brief video of yours running if poss. All the best. Andrew
More I watch the more I love it , I did think you were going to say your new book turned out to have the same sizes as the 1940's one in it for your spring making .
Good point Nicholas. I'm not sure why I couldn't sus it out in the old version. The newer version seems to be a lot easier to understand and the format has changed considerably. All the best. Andrew
Very helpful videos, your a good mentor Andrew! and easy to follow. i am very fortuante to have found a full and good set of 48 pitch gear cutters made by Walter Spencer & Co Sheffield on ebay so i will give these ago and see how i get on with the gear cutiing. Lots of trouble sourcing 6 " flywheels so thanks again for your suggestion...hope he has some left for me!
Thanks Andy. Lucky you! - regarding the gear cutters. I'm sure Lee will help you out with the flywheels (please mention my name). One thing to be aware of is that the hub in the drawings sticks out beyond the outer rim. I guess it's pretty impossible to get cast flywheels with that feature. I think I will attach a small piece of cast iron onto the hub before machining. I need to give it some thought first. Good luck with the build. Cheers Andrew
@@learningturningmetal Thanks Andrew will do, nothings simple is it, but makes it all the more interesting the word ingenity comes to mind or in our case enginuity ..i dont know
I had a similar problem with my build, I made an offset brass bush so the gear mesh can be infinitely adjusted, then locked off with grub screw. Clickspring makes his gears then uses a gear depth tool to mark up his hole pitches to suit the gears he has made
Hi James - I'm glad I am not alone. I did wonder about some kind of offset on the camshaft, but I thought that it might introduce more problems trying to get the fork end parallel with the base. I would be interested in seeing your design. I now need to be thinking about a base to hide away your electronics. Cheers Andrew
Ah it's just dawned on me what you mean. An offset brass bush is a really simple solution - why didn't I think of that! I was focusing on the camshaft. Great idea. Cheers Andrew
Learning Turning Metal - by Andrew Whale Hi Andrew, yes it gives good control of friction, noise and backlash. Too much friction and these small engines don’t “miss” much
I have Machinery's Handbook Edition 24 dated 1992. Table 22 Arbor Diameters for Springs made from Music Wire. Is on page 322. so a lot has been added or subtracted to Edition 30. I too like to read tech books. there is so much fascinating info!
Hi Mark - it sounds like your edition is reasonably up-to-date. The format/difference of Edition 30 is considerable compared to my 1944 version. I might only use 5% of the content, but it's a really interesting read. I've just learnt how to temper my hardened steel! All the best. Andrew
Hi Craig. Great stuff. It will be a bit of a journey and I found lots of challenges along the way. It's a really interesting project and I have learnt lots. I hope mine will run, and yours too of course. Drop me an email if you need any advice, and I will try to help. Have fun and good luck! Cheers Andrew
G’day Andrew it was unfortunate the instructions were incorrect as we don’t have that much hair to pull out in our advancing years, good to see you overcame the issue. Another way for a fix was to machine the gear section of the shaft offset by the requisite amount. Cheers Peter
Hi Peter I did wonder about an offset, but I thought it might introduce other problems in getting the fork end parallel with the base. Plus the challenge of me machining it correctly! James C says that he made an offset brass bush so the gear mesh can be adjusted. Interesting! Cheers Andrew
Yeah - unfortunately I like flicking between pages. I've never been a fan of electronic books. I also read somewhere that there are unlicenced pdfs kicking around the internet - not something I support. All the best. Andrew
@@learningturningmetal I'm not sure why you made the leap to knock-off's. Industrial Press, the publisher of Machinery's Handbook, sells it in both paper and electronic versions. It may have changed since I purchased my copy, it was on a CD-ROM in a secure PDF format which required activation. They now offer it via the internet. The electronic version has some significant advantages over paper: It's much easier to search and there are embedded hyperlinks, but the biggest to me is that I can print the pages I need and don't have to worry about damaging the manual with my oily hands ;-)
Back when I was "in the biz" my wife could never understand my taking a programming manual for bedtime reading. Nothing like a nice database rationalizing methods manual to keep me up way beyond when the light should have been off.
Yeah Jim I was pretty much the same. I took my 'C' programming manual on a two week holiday way back when and manually wrote a load of code. It keeps the old grey matter active. All the best. Andrew
I've never read The Machinist's Handbook... I've been waiting for someone to make the movie. They haven't yet but I live in hope. I just hope it hasn't got Brad Pitt in it (he gets in everywhere).
Hi Mark - I guess you are referring to the handbook. Yeah, I think that there is a 31st Edition out now, but I settled for this one. Quite expensive considering that 95% of the content might not get used - but who knows what the next project might bring! It's an interesting read too. Cheers Andrew
I have been enjoying your journeys immensely. But, alas, I will have less time to view since my brand new mini lathe arrived today. OK, I admit it, I watch machining vids on TH-cam before I turn the lights out.
Hi Andrew, The gear look good... lots of maths in this episode... I have 21st edition of the machinery handbook... sounds like an upgrade would pay dividends. Take care Paul,,
Thanks Paul. I think it was worth me moving from 1944 to 2016. Not sure if you would see a great benefit moving from the 21st edition. Though I could be wrong! All the best. Andrew
Was just about to go to the lathe when you latest video appeared. I had to have a watch. Can you stop posting just as I am about to go and do some work please, you are delaying me!! 😎😁😂😂
Making springs is pretty much like cutting threads, you determine the diameter of the spring, the pitch and length. You just need to make a simple tool holder with a hole through which the wire is fed and then set your threading gears to the correct pitch. Allowing your spindle to make a few rotations before and after engaging the lead screw will give you a nice flat coil on each end. Here is a video of springs being made on a CNC lathe. th-cam.com/video/fgXaS_QyTio/w-d-xo.html&ab_channel=SHOPMASTERSHOPTASKCHICAGOLATHE
Excellent detective work on the gear centres - I bet you were gutted when they wouldn't mesh the first time - I know I would be! Make sure your inlet spring has got enough turns- I could only count 5 (the ends don't count) - If you like geeky stuff, have a look at the spring calculator spreadsheet here (not mine): sites.google.com/site/lagadoacademy/machining---lathes-mills-etc/tools---spring-making
Hi Mike - I can't believe that they are incorrect either. Can you point out the error in my maths and logic though? Like I say, my calculations indicate that they are wrong. Cheers Andrew
@@learningturningmetal sorry unfortunately i do not know were it went wrong your math skills are way over my head all's i know is when i made mine i followed the drawings and they came out near perfect anyways im glad to see you made it work in the end. if your interested i have a few short videos on my channel of my finished farm boy. and by the way you make great videos keep it up.
Thanks Mike - you made a fantastic job of yours. I doubt I will be able to achieve such a high quality finish. Your attention to detail is amazing. I think you have set the bar too high for me. All the best. Andrew
NOTE: At 6:30, where I discuss pitch diameters, there is a transcription error. I show 76 / 50.8 = 1.5354. It should be 1.496. However the end result of 38mm is correct.
Thank you again Andrew for another installment of your build. Great work as always.
Cheers John!
Beautiful job Andrew, the gears looks fantastic
Cheers Matty!
Hi Andrew , another excellent video. Those flywheels will look the part. I've been looking for some 3 1/2in ones for the Kerzel engine but not having much luck so will probably have to machine a pair. The more I read the 'Machinery's Handbook' the more respect I have for engineers. Theres just so much to this hobby. Regards Kevin
Hi Kevin. It's definately a mindblowing subject. My father was a draughsman and in those days he had to manually draw gears. His old version of the book still has some valuable info not covered in my new one. Good luck with the flywheels. I just couldn't face trying to machine two 6" ones - though lots of people do. The plans show the centre boss sticking out beyond the outer rim - so I think I might need to do some kind of modification.
All the best.
Andrew
Really enjoyed this one Andrew. Your thinking and working out to solve the gear distance problem was a great lesson to us all. I suppose with hindsight you would have set up the shafts before drilling to check the clearance. I am intrigued by hit and miss governors. It will be fascinating to see its mysteries unfold as you progress. That Machinists Handbook is quite a tome! Plenty of light reading for you in there. The engine will look really good with that chunky pair of flywheels. They should also give all the inertia you need to keep her ticking over.
Thanks Tim. Second time round it occurred to me too that it would have been better me setting up the shafts first time round. Hey ho, I learn best by making mistakes - hopefully I will remember next time. Yeah - those flywheels look the business.
Cheers
Andrew
Another lovely video. I got some of those Chinese hit and miss engines from banggood to play with and found that a cheap (Harbor Freight) 6 in 1 screwdriver I had was the perfect size socket to get the little spark plug out. If you get to fitting the spark plug and have issues finding a low clearance socket, you can try that. I think the Farm Boy plans use the same plug
Thanks for the info Henry - very much appreciated.
All the best.
Andrew
Another great video Andrew, and thanks for the mention. I'm almost done with my flywheels and I estimate they took about 40 hours to machine from stock discs, so you did yourself a favour buying those castings. I'm not happy with my gears but I think they'll work okay - yours look much better than mine. As a matter of fact those gears are the reason I'm building a Farm Boy. I wanted to try making gears and bought a set of involute gear cutters and wanted to make a couple of gears for practice. I'd bought the Farm Boy drawings about three years ago when I set up my home machine shop and back then building it was a bit too advanced for me, but by the time I bought the gear cutters this year my skills had improved so I decided to have a go at making the gears. When they were completed I made a couple more parts and ultimately decided to make the entire engine. I just have to finish chamfering the flywheel spokes and then make the fuel mixer and hopefully I can make it "chooch" as AvE would say.
No worries mate. I pretty much followed your footsteps. I always (over the past couple of years) fancied having a go at making some gears, so that was the first thing I tackled on the Farm Boy. I didn't realise just how much work is needed to build the rest of it. It's a really good way to help develop your engineering skills though - lots of variety and challenges along the way. I would be interested in seeing a brief video of yours running if poss.
All the best.
Andrew
More I watch the more I love it , I did think you were going to say your new book turned out to have the same sizes as the 1940's one in it for your spring making .
Good point Nicholas. I'm not sure why I couldn't sus it out in the old version. The newer version seems to be a lot easier to understand and the format has changed considerably.
All the best.
Andrew
Have you thought of making a depthing tool for setting dimensions of gear centers?
Hi Nick - I've not heard of that before. Can you point me in the right direction?
Cheers
Andrew
@@learningturningmetal Search the Clickspring YT site. Chris made a nice one for sorting gear spacing out.
@@jimmurphy6095 Thanks for the tip Jim!
Very helpful videos, your a good mentor Andrew! and easy to follow. i am very fortuante to have found a full and good set of 48 pitch gear cutters made by Walter Spencer & Co Sheffield on ebay so i will give these ago and see how i get on with the gear cutiing. Lots of trouble sourcing 6 " flywheels so thanks again for your suggestion...hope he has some left for me!
Thanks Andy. Lucky you! - regarding the gear cutters. I'm sure Lee will help you out with the flywheels (please mention my name). One thing to be aware of is that the hub in the drawings sticks out beyond the outer rim. I guess it's pretty impossible to get cast flywheels with that feature. I think I will attach a small piece of cast iron onto the hub before machining. I need to give it some thought first.
Good luck with the build.
Cheers
Andrew
@@learningturningmetal Thanks Andrew will do, nothings simple is it, but makes it all the more interesting the word ingenity comes to mind or in our case enginuity ..i dont know
I had a similar problem with my build, I made an offset brass bush so the gear mesh can be infinitely adjusted, then locked off with grub screw. Clickspring makes his gears then uses a gear depth tool to mark up his hole pitches to suit the gears he has made
Hi James - I'm glad I am not alone. I did wonder about some kind of offset on the camshaft, but I thought that it might introduce more problems trying to get the fork end parallel with the base. I would be interested in seeing your design. I now need to be thinking about a base to hide away your electronics.
Cheers
Andrew
Ah it's just dawned on me what you mean. An offset brass bush is a really simple solution - why didn't I think of that! I was focusing on the camshaft. Great idea.
Cheers
Andrew
Learning Turning Metal - by Andrew Whale Hi Andrew, yes it gives good control of friction, noise and backlash. Too much friction and these small engines don’t “miss” much
I have Machinery's Handbook Edition 24 dated 1992. Table 22 Arbor Diameters for Springs made from Music Wire. Is on page 322. so a lot has been added or subtracted to Edition 30. I too like to read tech books. there is so much fascinating info!
Hi Mark - it sounds like your edition is reasonably up-to-date. The format/difference of Edition 30 is considerable compared to my 1944 version. I might only use 5% of the content, but it's a really interesting read. I've just learnt how to temper my hardened steel!
All the best.
Andrew
Just received my plans for this project Andrew. Ordered the aluminium, wish me luck.😄
Hi Craig. Great stuff. It will be a bit of a journey and I found lots of challenges along the way. It's a really interesting project and I have learnt lots. I hope mine will run, and yours too of course. Drop me an email if you need any advice, and I will try to help.
Have fun and good luck!
Cheers
Andrew
@@learningturningmetal I'm hanging on your shirtails Andrew 🤣
Good save!
Cheers David!
G’day Andrew it was unfortunate the instructions were incorrect as we don’t have that much hair to pull out in our advancing years, good to see you overcame the issue. Another way for a fix was to machine the gear section of the shaft offset by the requisite amount.
Cheers
Peter
Hi Peter
I did wonder about an offset, but I thought it might introduce other problems in getting the fork end parallel with the base. Plus the challenge of me machining it correctly! James C says that he made an offset brass bush so the gear mesh can be adjusted. Interesting!
Cheers
Andrew
I bought one of those flywheels, they are good quailty the best I've got off Ebay.
Yeah - they look like really good quality. Lee seem like an OK bloke too.
Cheers
Andrew
The Machinerys Handbook is also available as a PDF which I find to be far more convenient than the paper version.
Yeah - unfortunately I like flicking between pages. I've never been a fan of electronic books. I also read somewhere that there are unlicenced pdfs kicking around the internet - not something I support.
All the best.
Andrew
@@learningturningmetal I'm not sure why you made the leap to knock-off's. Industrial Press, the publisher of Machinery's Handbook, sells it in both paper and electronic versions. It may have changed since I purchased my copy, it was on a CD-ROM in a secure PDF format which required activation. They now offer it via the internet.
The electronic version has some significant advantages over paper: It's much easier to search and there are embedded hyperlinks, but the biggest to me is that I can print the pages I need and don't have to worry about damaging the manual with my oily hands ;-)
Fair enough, but I just prefer paper books.
All the best.
Andrew
Back when I was "in the biz" my wife could never understand my taking a programming manual for bedtime reading. Nothing like a nice database rationalizing methods manual to keep me up way beyond when the light should have been off.
Yeah Jim I was pretty much the same. I took my 'C' programming manual on a two week holiday way back when and manually wrote a load of code. It keeps the old grey matter active.
All the best.
Andrew
I've never read The Machinist's Handbook... I've been waiting for someone to make the movie. They haven't yet but I live in hope. I just hope it hasn't got Brad Pitt in it (he gets in everywhere).
Di you get it form new? M
Hi Mark - I guess you are referring to the handbook. Yeah, I think that there is a 31st Edition out now, but I settled for this one. Quite expensive considering that 95% of the content might not get used - but who knows what the next project might bring! It's an interesting read too.
Cheers
Andrew
Awesome
Thanks mate!
I have been enjoying your journeys immensely. But, alas, I will have less time to view since my brand new mini lathe arrived today. OK, I admit it, I watch machining vids on TH-cam before I turn the lights out.
Thanks T! I wish I had kept my SC3 mini lathe cos two lathes are better than one! Have fun with your new toy.
Cheers
Andrew
Hi Andrew,
The gear look good... lots of maths in this episode...
I have 21st edition of the machinery handbook... sounds like an upgrade would pay dividends.
Take care
Paul,,
Thanks Paul. I think it was worth me moving from 1944 to 2016. Not sure if you would see a great benefit moving from the 21st edition. Though I could be wrong!
All the best.
Andrew
Was just about to go to the lathe when you latest video appeared. I had to have a watch.
Can you stop posting just as I am about to go and do some work please, you are delaying me!!
😎😁😂😂
Sorry Graham - I'll schedule all future ones at midnight ha ha.
I hope I didn't distract you too much.
Cheers
Andrew
Making springs is pretty much like cutting threads, you determine the diameter of the spring, the pitch and length. You just need to make a simple tool holder with a hole through which the wire is fed and then set your threading gears to the correct pitch. Allowing your spindle to make a few rotations before and after engaging the lead screw will give you a nice flat coil on each end. Here is a video of springs being made on a CNC lathe.
th-cam.com/video/fgXaS_QyTio/w-d-xo.html&ab_channel=SHOPMASTERSHOPTASKCHICAGOLATHE
Very neat!
Excellent detective work on the gear centres - I bet you were gutted when they wouldn't mesh the first time - I know I would be! Make sure your inlet spring has got enough turns- I could only count 5 (the ends don't count) - If you like geeky stuff, have a look at the spring calculator spreadsheet here (not mine): sites.google.com/site/lagadoacademy/machining---lathes-mills-etc/tools---spring-making
TH-cam windy Hill foundry He cast a lot of stuff in cast iron For people all over the country
Hi Howard - really good info for North America followers especially considering the Farm Boy originates from the USA.
Nice one!
Andrew
the drawings arnt wrong
Hi Mike - I can't believe that they are incorrect either. Can you point out the error in my maths and logic though? Like I say, my calculations indicate that they are wrong.
Cheers
Andrew
@@learningturningmetal sorry unfortunately i do not know were it went wrong your math skills are way over my head all's i know is when i made mine i followed the drawings and they came out near perfect anyways im glad to see you made it work in the end. if your interested i have a few short videos on my channel of my finished farm boy. and by the way you make great videos keep it up.
Thanks Mike - you made a fantastic job of yours. I doubt I will be able to achieve such a high quality finish. Your attention to detail is amazing. I think you have set the bar too high for me.
All the best.
Andrew