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Crossbows - Everything about Building, Modding, and Using your Crossbow Gear

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3 posters

    3-in-1 Mill/Drill/Lathe

    Ivo
    Ivo
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    Post by Ivo Sun May 09, 2010 7:37 pm

    Hello my respectable machinists Smile

    I do not own any mills/lathes yet and have only worked with such machines on a scale of clock work mechanisms - Very precise, but miniature in size and rather simple in construction with little number of features.

    I have little space, so I would like to hear your thoughts on the 3-in-1 combo machines and whether they are comparable to dedicated mill/drill and lathe machines.

    What popped up in one of my searches is Smithy 3-in-1 series.

    >>> http://www.smithy.com/products.php?cid=1

    3-in-1 Mill/Drill/Lathe Gn-13210

    It looks like a good package that is close to my budget(that is if I save up for a few months Razz ), what are your thoughts on these machines? ...are there any others you can recommend? ...and of coarse how big should I go on the size and features when targeting crossbow making? biggy

    Thank you for all your help,

    Ivo



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    Hermit
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    Post by Hermit Mon Nov 11, 2013 6:39 pm

    Hi Ivo.
            The Smithy is not a bad machine,but it is a 3 in 1,so it's a compromise.You can do all the milling you need for crossbow work in a lathe.I would suggest you read up on lathe work or watch some videos,better yet,subscribe to some magazines,there are 3 good ones,Model engineer,Model engineer's workshop,both of these are British publications,Home shop machinist is American.In order to mill on a lathe,you will need a Vertical slide,which is fitted on the lathe on the cross slide.The best lathe for this,is a Myford,as it has a "T" slotted cross slide,a good used one is ideal.Another lathe that is suitable is the American Atlas lathe,you can get milling attachments for it. There are quite a few good sites on the internet that describe and show machining operations on the lathe.
                                                        Lathe sizes:there are 2 dimensions that are used to define a lathe's size,one is "Swing",this is the distance from the centre of the lathe's spindle,to the top of the lathe bed,or ways.Most lathes of a size suitable to crossbow work will be either 7ins. or 9 ins. swing.double this measurement and it will give you the largest size of work you do on the lathe in theory,(practically,it works out to a bit less)the next dimensions will; be"between centres",this is the longest piece of work you can put in the lathe,a lathe suitable to you would be 20-24ins. between centres.As you can see,this is a HUGE subject.It would take a few hours of conversation to tell you all you need to know.My best advice to you,would be to find a really knowledgeable Model Engineer,or a skilled machinist,in that order,read books on model engineering,and watch videos on You tube,there are a lot out there.As I have said,you can do all the milling you need in crossbow making on a lathe,if you have the right kind of lathe and a top slide,in any material you want,steel,aluminium and plastics,a lathe is the first machine you should go for,but you really need knowledgeable advice from a machinist before you buy,particularly if you are on a limited budget.Any other questions you have,I would be pleased to answer,so if you have any P.M. me.With machining,you need the best advice you can get.otherwise you can spend a lot of money on machines that will dissapoint you,because they are not suitable to do the work you want them to.
                                              Hermit.
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    8fingers
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    Post by 8fingers Sat Nov 23, 2013 7:30 pm

    Vintageplans.com has plans for small make it yourself lathes. There is a series of books called the Machinists Bedside Reader http://www.amazon.com/Machinists-Bedside-Reader-complete-Vols/dp/B003JGIK2C/ref=sr_1_2?s=books&ie=UTF8&qid=1385259966&sr=1-2&keywords=machinists+bedside+reader has a lot of plans for your own accessories. I met the author when I was a small kid. He knows what he is doing. Another series is Gunsmith Kinks.

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