Should I mess with manufacturer recommended feeds and speeds?

[BajaFire]

Don't buy a copy of Machinery's Handbook - every single piece of information in that brick of paper is a 100 fucking years old and I don't know why people keep recommending it.

It's recommended because the mechanical trades have been around for 100+ years...hard to prevent tomorrow's mistakes when you don't remember what you learned yesterday
Besides, there's more information in there besides speeds/feeds (the formulas for beams in bending or sizes of H-beam haven't changed recently)

 

[Vancbiker]

……Don't buy a copy of Machinery's Handbook - every single piece of information in that brick of paper is a 100 fucking years old and I don't know why people keep recommending it.

IMO, how useful it is depends a lot on what you do. I use mine pretty regularly. Little odd things like Woodruff key sizes or wrench clearances. My CAD computer is not internet connected so googliing that type info means moving to a different machine or going into the shop to actually measure something. Too easy just to pop open the old Handbook and get what I need.

 

[Donkey Hotey]

Don't buy a copy of Machinery's Handbook - every single piece of information in that brick of paper is a 100 fucking years old and I don't know why people keep recommending it.

Tell us you haven't opened one in ten years without telling us you haven't opened one in ten years.

I looked up the numbers for cutting with carbide end mills and the answers I got out of a 20 year old book were actually higher than what Haas recommended. It's also going to have the starting point for all of his drilling feeds and speeds in all kinds of materials. That's where he'll go for guidance on various fits (loose clearance, clearance, light press fit, press fit, shrink fit, etc.). That's just a couple of examples right off the top of my head that I use it for regularly.

 

[AmericanMaker]

I found a PDF of the complete 29th edition to check it out. Tons of great stuff in there that I can learn from. I'll order the 31st edition from Amazon. $90 is cheap for all the useful content that is in it, and it will be nice to have a version that I can hold in my hand and reference easily.

Thanks for all the great comments in this post. They've been really helpful to me.

 

[gregormarwick]

My CAD computer is not internet connected so googliing that type info means moving to a different machine or going into the shop to actually measure something. Too easy just to pop open the old Handbook and get what I need.

This is a legitimate reason to use it, but it's the only legitimate reason!

Tell us you haven't opened one in ten years without telling us you haven't opened one in ten years.

I have a copy on my shelf, I think it's the 28th edition. I actually opened it about a month ago, but the information I was looking for wasn't in there so not sure if that counts

He already has the Engineer's Black Book, which contains all the actually useful information you mentioned, in a much easier to navigate format than the MH.

 

[Mtndew]

Don't buy a copy of Machinery's Handbook - every single piece of information in that brick of paper is a 100 fucking years old and I don't know why people keep recommending it.

Hey guys, disregard the pythagoreum theorem and all other geometric equations in that book because they are 100 years old.
Oh and the sections about threads too, that's old.

Care to share with the rest of the world the formulas and new thread sizes you use that were invented this year so we can stay up to date?

 

[Cole2534]

Hey guys, disregard the pythagoreum theorem and all other geometric equations in that book because they are 100 years old.
Oh and the sections about threads too, that's old.

Care to share with the rest of the world the formulas and new thread sizes you use that were invented this year so we can stay up to date?

Totally tangent- but that's what it sucks that college textbooks are so damn expensive. Newtonian physics, and all the engineering work derived from it, hasn't changed in quite a while, but by God you'd better have the latest textbook.... for $350.

 

[Mtndew]

you'd better have the latest textbook.... for $350.

Those prices are because people pretty much have no choice but to buy them.
College tuition and book prices are a scam. Have been for a LONG time.

 

[kenton]

Those prices are because people pretty much have no choice but to buy them.
College tuition and book prices are a scam. Have been for a LONG time.

Saturday Morning Breakfast Cereal - 2015-01-25

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[gregormarwick]

Hey guys, disregard the pythagoreum theorem and all other geometric equations in that book because they are 100 years old.
Oh and the sections about threads too, that's old.

Care to share with the rest of the world the formulas and new thread sizes you use that were invented this year so we can stay up to date?

As I already said, ALL of that information is in a book that he already has.

If you want to look up the dimensions of some esoteric spindle taper from a machine that was obsolete before your grandfather was born, then use the MH by all means.

 

[mhajicek]

Totally tangent- but that's what it sucks that college textbooks are so damn expensive. Newtonian physics, and all the engineering work derived from it, hasn't changed in quite a while, but by God you'd better have the latest textbook.... for $350.

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[Donkey Hotey]

Don't forget used. Here's two copies of the 28th edition for right around $30-35 shipped.

Machinery's Handbook, 28th Edition 9780831128012 | eBay

Find many great new & used options and get the best deals for Machinery's Handbook, 28th Edition at the best online prices at eBay! Free shipping for many products!

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Machinery's Handbook, 28th Edition Oberg, Erik Good Book 0 hardcover 9780831128012 | eBay

Find many great new & used options and get the best deals for Machinery's Handbook, 28th Edition Oberg, Erik Good Book 0 hardcover at the best online prices at eBay! Free shipping for many products!

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[???]

Don't buy a copy of Machinery's Handbook - every single piece of information in that brick of paper is a 100 fucking years old and I don't know why people keep recommending it.

If you are only a machinist a valid point. If you design and build or repair then you absolutely need it.

 

[CarbideBob]

This book is must have.

 

[gregormarwick]

If you are only a machinist a valid point. If you design and build or repair then you absolutely need it.

I do all of these things, maybe not repair so much these days, but still.

MH is big, unweildy, and bogged down with endless swathes of ancient, obsolete data. I have much better and more convenient sources of the frequently used information, and what's missing is quicker to just google it.