Gear cutter help

[RobonthemoorParticipant @robonthemoor]

#1 Module 14.5 PA #7 horizontal gear cutter where can I buy one?

rob

[RobonthemoorParticipant @robonthemoor]

[John Stevenson 1Participant @johnstevenson1]

Never seen one, not saying they don't exist but Mod cutters and hobs are universally 20 degrees.

What is it for ?

[Rufus RoughcutParticipant @rufusroughcut]

Hi Rob

Try Maxsharp Tools on ebay or tinternet, are you sure it's not a # DP at 14.5 PA as john says there usually 20 PA

Rufus

[Rufus RoughcutParticipant @rufusroughcut]

Hi Rod

Must have followed you to Practical Machinist thread also, fair the well on thy quest

Rufus

[RobonthemoorParticipant @robonthemoor]

It's to make a new quill lever, a guy in the stats has made a new one & he told me what cutter I need to cut the gears, see picture below.

[RobonthemoorParticipant @robonthemoor]

Found one across the pond USA, this is the wording, but what does the 5P mean???

Involute gear cutter 14.5 PA 5P Cutter #7, New old Stock, mfr. National Detroit

Rob

[Anonymous]

It signifies a 5DP cutter – Andrew

[John Stevenson 1Participant @johnstevenson1]

Followed that post over on PM where the guy said he'd bought the cutter from Travers tool so had a look.

What a total mess of a web page. Sure it lists in 14.5 degree and 20 degree but nowhere could i find 1 mod, everything is in pitches.

Anyway we have had this conversation before and if it's Deckel it will be 20 degrees PA.

[RobonthemoorParticipant @robonthemoor]

Hi John, yes my thoughts on Travers web page was the same, but as I am a beginner I thought it was me being a div! I have rang them & they will contact me when they stock check the item.

rob

[JasonBModerator @jasonb]

There is a massive difference between the tooth size on a 5DP cutter and a MOD one. I can't see how you will get enough teeth into the shaft with a 5DP cutter.

Can't quite count the teet but say its 14T. if you use a MOD1 cutter the shaft will be 16mm dia. If you use a 5DP cutter the shaft needs to be 3.200" dia

Edited By JasonB on 27/09/2013 08:23:48

[RobonthemoorParticipant @robonthemoor]

Hi Jason yes your right, but I'm looking for a module 1 14.5 PA number 7 gear cutter with ether a 1" or a 7/8" centre.. The shaft is 16mm OD 14 splines. Look on PM for full dicushon, thread Deckel FP1 quill feed lever help under the Deckel section.

Rob

[John Stevenson 1Participant @johnstevenson1]

Personally i think the info on PM is wrong.

Just because he's made a shaft doesn't mean to say it's right, By altering depth of cut you can make a 14.5 fit in where a 20 is needed and visa versa.

In this case, slow moving hnad operated it probably won't make any difference but doesn't meant to say it's right.

You can buy a stick of gear rod from HPC the right size and turn / sleeve the rest to fit.

[RobonthemoorParticipant @robonthemoor]

John have you got a tel number for HPC?

Rob

[JasonBModerator @jasonb]

Contact details for HPC

[Brian WoodParticipant @brianwood45127]

Hello Rob,

I would also be keen to establish what caused the crash in the first place, the picture clearly shows helical twisting in the gear section, strongly suggesting an excessive loading before the worm drive got to work and stripped off all the teeth..

Then I would repair it, knowing what had gone wrong and put that right as well. A nice suggestion of John's by the way, some lateral thinking there..

Kind regards Brian

[RobonthemoorParticipant @robonthemoor]

Hi guys, this drive could have been used for something else when the damage was done! As the mill is 100% ok, we will never know. I have taken it all to bits & totally rebuild it, very dirty but in top condition it is so nice to use I'm impressed. I wanted a Bridgeport with a passion & still like them, but this as a horizontal system as well where the BPort has to be fitted with a different head, and finding one could prove a challenge. Al204 & I are going to look at a larg 6' bed lathe tomorrow night so my myford will need a new home if I buy it! And I think I will. Will post photos to see if you guys can tel me how good a lathe they are, we don't know the make as yet the owner just sent photos.

Rob

[Brian WoodParticipant @brianwood45127]

Hello again Rob,

One final thought on restoring that damaged shaft, particularly as you say you don't know how it happened, would be to let in the gear rod section that John Stephenson suggested with a shear pin coupling at the end that matters; just in case it happens again.

When I worked locally for an agricultual engineers, the BOKO verical mill tried to plunge cut the hardened table while the operator was in the office answering the phone. OK, it shouldn't have happened, but you know how it is, the job was on auto. We found out afterwards that the 'sealed' electrical terminal box on the control apron along the front of the table was full of coolant and had switched on the down feed.

I'm not saying that sort of thing happened in your case, but sometimes unexpected events of that kind occur and a shear pin is an easily replaced safety component in a drive system

Kind regards Brian

[Ian S CParticipant @iansc]

Perhaps the quill was used as a press, a bit much heave ho! Ian S C

[RobonthemoorParticipant @robonthemoor]

Hi guys, the mill has a shear pin, & it was sheared when I recived the deckel FP1 on the pallet.

rob

[RobonthemoorParticipant @robonthemoor]

This is the new toy.

[John Stevenson 1Participant @johnstevenson1]

Wow a vertical boring lathe, – rare.

[RobonthemoorParticipant @robonthemoor]

Lay down to view, silly

rob

[RobonthemoorParticipant @robonthemoor]

Well I have finally got round to the shaft but it is going badly! Could not find a gear cutter mod 1 14.5 PA #7 so trying with a fly cutter but it just keeps taking the edge off it! I have coolant running 10thu at a time how else can I do this.

rob

[John Stevenson 1Participant @johnstevenson1]

What speed you running at ? and what diameter is the cutter set at ?

Looks to be set in the edge of a largish disk.

You sure it's 14.5 PA, very very rare for a mod cutter to be other than 20 degrees ?

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