Lanz tractor

You have two roads that you can follow.

1. One is the make a cutter as per the details on the drawing and cut the 57T & 19T or to another shape and adjust tooth count to suit. Cut the rest with your MOD1 set.

2. If you are ordering a set of cutters then they will have what is needed to do a 25T:77T MOD1 for the two gears in question so you could do them all MOD1

So really upto you if you want to have a go at making a cutter or not. maybe check what tooth numbers you can produce with your indexing/dividing setup and base your decision taking tat into account as it is not worth making a cutter for 19T if you can't get 19 divisions. If the single point cutter doe snot work out you can always fall back to cutting them all MOD1, for the use they are likely to get I can't see the smaller teeth being much of an issue.

Michael, glad I'm not the only one who thinks Julius likes to use as few sheets a possible

Lights on l think.

Right there is 3 gears that have 30 teeth ,so thats one cutter in module 1 if l have that worked out right

The rest of the gears use fly cutter to made to the dia on the drawing, so if l am right all l need to get is one cutter,lets hope l am there now

Hi John,

I have sent you a PM

Regards

Gray,

Thanks graham have sent back ,with regards to my last post forget it,l had not seen jasons post then ,sooooooo its all going to be module 1 set up , l take it the diameters stay the same, l have said to graham l feel bad l have to keep asking you kind people for help ,but have still loads to learn and to be honest the drawings could have been bigger with more space around them. So thanks

regards john

If you go with teh 25:77T sizes then the large brass diff gear needs to be 79mm overall diameter and the smaller output from the gearbox 27mm diameter for MOD1. Cut is 2.4mm deep.

Simple formula is (number of teeth plus 2) x MOD so taking the 77T you get (77 + 2) x 1 = 79.

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These might help a little [if you decide to make your own cutters]

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MichaelG.

Edited By Michael Gilligan on 12/07/2019 16:31:25

Though it would have been better if he had dimensioned the gap (cutter shape) rather than the tooth.

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I suppose you must be grateful for what you're given.

MichaeG.

Well all mybe l can sleep tonight without thinking about what cutters to use,will place order on monday for cutter set ,so in the next couple of weeks till they come will carry on making bits and also l will have to make a cutter holder ,my 48 dp cutters have a 1" bore and the holder for them is an old slitting saw arbor ,never did get round to putting a key way in it but the cutters never seemed to slip ,but the new cutters will have a 22mm bore , so will make new arbor again l may try without a key again but will se.

Going back to the drawings like michael said must be grateful for them plus they was free.

Now to you very kind people on here so many thanks for your time and help over this ,l will try not to bother you all again but expect l will need help when l get to the diff gear wheels,but have got a gear book by lvon law on the way ,so hope that will give me some help,but you all take good care .

many regards john

Hi graham

Have sent you a PM

john

For those wishing to make the tractor as it is drawn I have produced a drawing of the gear tooth cutter for the 19 and 57 tooth gears. Based on the information given on the drawing.

Regards

Gray,

Yes l like that cutter design very clear as to how it would work , l no one of my lathe gears is a bit worn ,so looking at that design ,if you have a gear on the bench you can then make the cutter to the right profile ,one could make almost any gear set up ,will have a play when l get my gears out of the way,just to say l can do it,this week has been a week of learning for me and very nice people to go with it.

john