Bench Lathe 3 in 1 (Lathe - Sander - Grinder/Sharpener)

Introduction:
 
When I submitted my instructable "The smallest workshop in the world" a lathe latter addition was presented as an add-on idea to the tool bench, after someone asked me... "Where is the lathe?"

At first I did a quick sketch lathe idea using a power drill for motor, just to show that a lathe was possible also to be added on that tool bench.
But then my visitors started trying to perfect the design idea with many positive comments.
It was on popular demand that I ended up sketching a woodworking Bench Lathe, as many visitors to my instructable where asking me for it.

There positive comments, feedback and rating votes, encourage me to publish this
"Bench Lathe 3 in 1" instructable.

So I started a research on how a lathe should be. I search for different ideas, for various parts of it and studying the mechanisms of other lathes in the market, as I wonted the bench lathe to be completely made out wood.

I was not ready to build the real thing as I have not the time at this moment, but I decided to give a workable 3D design that is easy to follow and to be build.

There are no exact measurements in the drawings firstly because I work in metric system and we all know how frustrating is to convert it to imperial (fractions do not much up, plywood thickness is 18mm for me but in U.S. is 19mm 3/4), and secondary because you can build it to measure your own space and needs. I will provide though the general measurements of this project.
I think that the 3D images I provide with the instructable are detailed enough to give you an accurate account of what is going on, how to build it and how to change its measurements.

The trick as I see it, is to find the right components that fit together to build the lathe's headstock turning mechanism. It should not be expensive, so everyone can build it, should be very safe, be solid and sturdy and with very good turning results.

I ended up designing a lathe that has also some add-ons like a faceplate to turn bowls. Has also the versatility to be used as a grinder/sharpening station and as a sanding station with its attachable disk sander and table.
The lathe I design is big enough to turn an 80cm (31") leg on it, but it could easily be extended either with a bed extension or by simply build longer.

So here it's what I came up with, I hope you enjoy and be inspired from the instructable.

Step 1 Materials & Hardware:

The materials I used for this lathe are very basic:

Mainly everything is made out of plywood always 18mm (3/4") thickness, except some parts that you could replace it with hardwood like the headstock, and 2 pieces of 2X2 pine wood stock for the lathe bed (base), the 2X2 stock length can be determent from  the length of the lathe you decide to build.

Hardware:

1 Bench grinder
2 Pulleys (3 step)
1 Belt
1 Double ended mandrel
2 Bearings
2 Stop collars
1 Drill chuck
1 Headstock spur drive center
1 Plate flange
1 On/off switch with box
2 Hinges
2 T-tracks
6 Flanged bolts
Various size woodscrews
Threaded inserts
2 Screw down threaded inserts
Bolts / washers / nuts / butterfly nuts / t-nuts
1 Threaded rod
1 Coupling nut
2 Acrylic guards
1 Steel wear plate

Comments

[gcook12]

I would like to build one of these with my son as a homeschool project. Do you have a sketchup file of it?

[wrsexton]

And an excellent project. My question is, how are you going to mount it on that fantastic small workbench you use that Fine Woodwoking Magazine published? Not sure you have enough room left there, although I guess it could be temporarily mounted atop the bench, then stored down below on the bench.

[steliart]

You have answered the question your-self :)
In my instructable The Smallest Workshop in the World you can see how and where is supposed to be stored on the multitool bench.

Thank you for visiting and commenting
Stelios

[bruji]

(removed by author or community request)

[steliart]

??? :)
English or Greek please

[bruji]

Hello, a question which I know used to winch motor bank 3 in 1 (Lathe - Sander - Grinder / Sharpener) if I have no right, is that really caught my attention thanks

[rapidprototyping]

some motors will work with motor speed controlers. this is i belive a reostate essentiall you dial in the speed you want from high speed to low speed I had one for my dremel tool. Motor speed controlers are available for routers as well so if that will work for some one with a router. I bought one combo mini lath at good will it ran for while then motor desenegrated so i took it apart and built similat pully arrangment to replace motor after finding the machine tool compay went out of business. the usable parts or a similatr lathe are the shaft bearing face plate tail stock and tool rest. always wear full face mask when turning on lathe.

[steliart]

I believe there many other ways to do a lathe and controll its speed. I just try to show one way of doing a low cost lathe. I am not a lathe expert put I beleive that the type of speed controll you will need it depence on the motor you will use. As for the full face mask... I totaly agree with you. Thanks

[jibbyjammin]

I think it is way cool and I totally get what you are trying to do. Thank you it is not for the professional but it is for the DIY'ERS. Thanks again

[steliart]

You are very welcome

[charles543]

 A grinder is too fast for a power source for a wood lathe using identical step pulleys.  A grinder runs around 3000 rpm or more (in the US).  This is about the maximum speed you want for a lathe, and you want to be able to get it down to about 500 rpm.  With equal pulleys your motor speed would be about the midrange of your lathe speeds making the top speed about 6000 rpm.  To use the grinder you would need step pulleys of unequal sizes so that the largest step on the grinder pulley would be about the same diameter as the smallest step on the headstock pulley, or you would need another set of pulleys to reduce the speed down.

[steliart]

Thank you for your comment.
If you have a look at step 3 that's what is about exectly, pulleys of unequal size.
It all comes down to what can you get to build this. As I say in the instructable is even better if you can get a low speed motor or if you have a look at step 11 you will also find an alternative solution using an old inexpensive drill press.

Thank you for visiting

[Woogaus]

Option B is to get a grinder with variable speed already built into it. I bought an inexpensive grinder at Sears that would work pretty good for this project. The only drawback I see is that the speed control is on the front of the grinder, so you would have to set the speed prior to starting your work, unless you feel comfortable doing some work on the grinder and relocating the on/off - speed control face plate to a safer location.

[steliart]

Thank you very much for your points.
 

I am not a lathe expert, and this is why at the end of my instructable I welcome every comment, suggestions, information and ideas.

Also this is why I was saying in my instructable that the difficult part is to find the right hardware for this project.
 

The information I found on this, it used a 1/4 HP (1725 RPM) and identical 3 step pulleys and by crossing the belt you get speeds from 4150 to 700 RPM. My grinder is double that speed as you said 2950, so yes it seems that it needs to be reduced either with unequal size of pulleys or another set of pulleys to reduce the speed down. I will look into this.
 

Anyway because I had my doubts, this is why I came up with the drill press dismantling idea which will give you speeds from 2650 to 580 RPM which I believe might be a good solution to the hardware problem.

I will have to correct the instructable according to your remarks.
 

Thank you very much for the constructive comments on this project

[woodworker101]

how about using a washing machine motor instead of the grinder?

[steliart]

Yes that can also work as long as you can control your speed. Please have a look at step 3.

Thank you for visiting

[fresnelman90]

I really like how you hinged the grinder to act as a tensioner for the belt.

Quite the engineer good sir!

[steliart]

thank you for visiting and commenting

[Dumchicken]

did you make that in google sketch up

[steliart]

Yes V.7pro

[Dumchicken]

cool!

[underground carpenter]

Although I already have 4 lathes, this project is very tempting to build, just to show off at my woodturning club. "Hey, Donna, bet my whole lathe cost less than your Oneway drive spur."

[steliart]

I would love to see my design build, I will apreciate a couple of photos when your done.
Thank you for visiting

[mr. clean]

so how well does the dead center work instead of a live center

[steliart]

Well both could work pretty good. Live center It allows higher turning speeds without the need for separate lubrication, and also greater clamping pressures. while a dead center produces friction between the workpiece and center, due to the rotation of the workpiece, therefore Lubrication is required.
You could made some changes to the design and mount another chuck on the tail and that will give you the possibility to change from dead to live center.

Thank you

[kleinjahr]

Yet another nice idea, well done. I didn't notice any means to lock the tail center in position, vibration can loosen it. Causes all kinds of problems. I'm not really fond of the position of the motor. Personal preference is to have it out of the way. Though I have seen commercial lathes with the motor in that position.
You suggestion about using a drill press is good, I've seen where someone did it. Sorry can't remember where I saw it, maybe it was another 'ible.

[steliart]

You mas have missed it. Look at stage 5 again (all pictures), there is a stop locking nut that keeps it in position. As for the motor, well you can modify the design and have it where you feel more safe with it, i.e you can make the lathe body longer and have the motor's pulleys facing inn and reverce the spin.

Thnks for visiting and comments

[profpat]

very nice and well designed!!

[steliart]

Thank you

[Thefsxmad]

Hi. I found your instructable interesting and very useful as I am attempting to build my own lathe from wood. Seeing as you made the model in Google SketchUp I would find it really useful if you uploaded it to the 3D warehouse and posted the link to it. Thanks.

[steliart]

Hope this instructable will help you on your project. Good luck & thanks for visiting

[tnek]

 Thanks for these ideas!!!  Your small workshop has had me looking at everything in a new light. I was about halfway done with building my new workshop here on the farm and these have given me great ideas to recycle old tools and equipment.  I now have additional funds to add a vacuum dust collection system!

[steliart]

 Since you were thinking of a vacuum dust collector check his out

http://www.instructables.com/id/Mini-Cyclone-Bucket-Dust-Collector/

[tnek]

Great idea!  Thanks! 
That gives me a great idea for recycling my dad's old shop vac.  It'll take some modifications, but the fittings would already be properly sized for me.  I can pull the fittings out of the top of the old vac and mount them into the top bucket.  Then remove the motor and patch the lid.  The old vac has wheels so I won't need to build a cart.

[steliart]

Glad that I could inspire you.
Thanks

[stampST]

Very clear cut intstructable plan. Maybe the best I have seen

[steliart]

 Thank you very much

[spiderboy]

 Cool design, is it difficult to learn to do something like this?

[steliart]

 Well I cannot answer if it's difficult or not, I think is up to the individual.
SketchUp has a good tutorial to get you started and even further.
Thank you

[tarataz]

Like your small workshop, your bench lathe design is amazing. I am not a woodworker but I know design and understand functionality of one.
My husband would love this.

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Thank you