How do I adjust the Gibbs?

[Pompey Dockyard]

Hi all,
When I did my fitting and turning apprenticeship (1956 - 1961) in Portsmouth Royal Naval Dockyard (in England) they were pronounced JIBS.
Depends on what part of the world and what part of the country you come from I suppose, but we had old, grizzled, very experienced instructors who had been around for about a century or two and they all called 'em JIBS, so did all the fitters, turners and machinists I ever knew - and they were from all parts of the UK.

Originally Posted by kong Thanks Jon, I say Gibbs with a g, but don't know a lot of machinists to speak to!

[Adobe Machine]

When woprking part time going to schools in a machine shop ,the owners were immigrant Europeans that pronounced the word as "jibbs".I became courious and asked one of the Senior professiors at my mechanical engineering school what the correct term was. He told us that as a young apprentice in Hungrary before the war, the english speaking staff said "jibbs".Since his credentials as an ME were not reconized in the US after immigration, started over at a ME college near Chicago where every one prounced it "gibbs". Quin sabe ?

Adobe (old as dirt)

[Pres]

"gib" it 'tis.
ref:
American Heritage Dictionary - 3rd Edition 1994
gib (g¹b) n. 1. A plain or notched, often wedge-shaped piece of wood or metal designed to hold parts of a machine or structure in place or provide a bearing surface, usually adjusted by a screw or key. --gib tr.v. gibbed, gib·bing, gibs. To fasten with a gib. [Origin unknown.]
---
jib (j¹b) n. 1. Nautical. A triangular sail stretching from the foretopmast head to the jib boom and in small craft to the bowsprit or the bow. 2.a. The arm of a mechanical crane. b. The boom of a derrick. [Origin unknown.]

[Greolt]

Originally Posted by Pres "gib" it 'tis. ref: American Heritage Dictionary - 3rd Edition 1994.............

That would be right, The world stops at the border of "The Good Old USA"

Don't be offended we love our US friends

[Pres]

Originally Posted by Greolt That would be right, The world stops at the border of "The Good Old USA"

Sorry to have presented the definition in an offensive manner.
I have been using the term "gib" for a long time (50+yrs), but then I saw it referred to as "gibb", "gibbs", "jib", etc.
Was there another (i.e. accepted) spelling or definition instead of gib?

Whenever I need a word defined (which is frequent) my PC is setup with a hot-key (Ctrl+Alt+h, Windows98) that pops up my local American Heritage Dictionary. Then I can simply cut and paste into whatever I'm working on.
I thought it best to show the source of where that definition came from.
Certainly, it was not to emphasize a US centric definition.

However, further examination on the web did not produce any other appropriate definitions using "gibb" or "jib".

Other web resources (non-US?) seem corroborate the definition.
They are:
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
Gib -Machinery
a. a thin, wedgelike strip of metal for controlling the area in which a moving part, as the table of a milling machine, slides.
b. a keylike part having a head at each end, used with a matching cotter as a fastening. See diag. under exploded view.
---

http://uk.encarta.msn.com/dictionary...07427/gib.html
gib noun (plural gibs)
Definition:metal wedge: something that is made of metal and holds another piece of metal or a machine part in place, e.g. a wedge, pin, bolt, or plate. [Late 18th century. Origin ?]
---

http://www.allwords.com/word-gib.html From The AND Dictionary:
gib noun
1. A small metal or wooden wedge used for keeping a machine part in place.
verb tr gibbed, gibbing 1. To secure with a gib. Etymology: 18c.
---

http://www.brainydictionary.com/words/gi/gib168979.html
Gib -A piece or slip of metal or wood, notched or otherwise, in a machine or structure, to hold other parts in place or bind them together, or to afford a bearing surface; -- usually held or adjusted by means of a wedge, key, or screw.
To secure or fasten with a gib, or gibs; to provide with a gib, or gibs.

Note:
I could not find any "gibb" related information.
All "jib" definitions seemed to focus on sail boats.

Thank you for taking the time to prompt me to reaffirm what the accepted spelling and definition is of that term.
Pres

[Greolt]

Wow Pres you've certainly done some research there

My Dad is a little older than you and was a machinist all his working life and he always called them gibs.

But if them Pommies want to call them jibs let em I say

They're all a bit eccentric over in the old country you know

Ha Ha that should get em going

[randyaz]

"irregardless" of the pronounciation...

How do you adjust the j/gib?

[martinw]

[QUOTE=Greolt;206936

But if them Pommies want to call them jibs let em I say

They're all a bit eccentric over in the old country you know

Ha Ha that should get em going [/QUOTE]


Dear Greolt,

Mad as a box of frogs I may well be, but......my Concise Oxford Dictionary (1983), a tome never less than a few inches from my grasp, says that GIBS and JIBS have equal validity.

Everyone's a winner!

Best wishes


Martin

[DragonV]

Hey, I see this post is old but, I will put the answer here for anyone who may need it in the future.

1) Center the table at the X-axis cold start position. Attach a magnetic base
and an indicator that reads in .0001 divisions just below the gib. Do not attach the indicator to the table! Place the indicator on the end of the table just above the gibb. Adjust and set
at a zero reading.
2) Place a pry bar between the front table gib/strap assembly and the saddle.
3) With the pry bar, move the table forward so the solid rear way of the table is
against the saddle.
4) Zero the indicator.
5) Place the pry bar between the rear table gib/strap assembly and the
saddle.
6) Gently pry the table the opposite way.
7) The indicator reading is the adjustment that needs to be made. A properly
adjusted set of gibs will have a front to back motion of .0003”.
8) If the gib needs adjusting, there is a gib adjuster screw located at the end
of the gib. Turning this screw clockwise will loosen the gib and turning it
counter clockwise will tighten the gib.
9) Repeat the above steps until a .0003” indicator motion is achieved. Then,
perform the procedure over again for the gib at the opposite end.
After both gibs have been completely adjusted, run the table to its extremes at
the plus and minus ends and then return the table back to center. Then, repeat
the above gib adjustment procedure for verification.