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RE-NEW MACHINE & MAINTENANCE, A Division of Repair Parts, Inc.
2415 Kishwaukee Street, Rockford, Illinois 61104
Phone: (815) 968-4499 Fax: (815) 968-4694
The One-Stop Shop for
Barber-Colman Machine Tools
- Machine tool reconditioning
- Repair and replacement parts
- Factory trained service
- Training -- operator, set up, or maintenance -- in your facility or ours
- Gear Machine Sales -- We have reconditioned hobbers & sharpeners in stock -- can be seen under power
- Hob sharpening
- Consulting and appraisals
The "Tips & Techniques" section offers helpful hints on the use and maintenance of your
Barber-Colman gear cutting and hob sharpening machines. We have a wealth of information available on
this kind of equipment and we think that this would be the ideal forum to share some of it with you.
We update these monthly, so be sure to bookmark this page and check back often.
The last two months we gave you a
number of formulas that are used for figuring gear setup for hobbing machines. We thought that
this month we would give you a list of commonly used gear nomenclature.
Gear Nomenclature
| a |
Addendum |
| b |
Dedendum |
| B |
Backlash |
| C |
Center distance |
| c |
Clearance |
| D |
Pitch diameter |
| Db |
Base diameter |
| F |
Face width |
| h |
Height |
| L |
Lead |
| mr |
Involute contact ratio |
| mF |
Face contact ratio |
| mt |
Total contact ratio |
| N |
Number of teeth |
| R, r |
Ratio |
| P |
Diametral pitch |
| Pn |
normal diametral pitch |
| Pt |
transverse diametral pitch |
| Pb |
Base pitch |
| P |
Circular pitch |
| Pn |
Normal circular pitch |
| Pt |
Transverse circular pitch |
| T |
Torque |
| tn |
Normal tooth thickness |
| tt |
Transverse tooth thickness |
| W |
Load |
| Y |
Tooth form factor |
| Z |
Length of action |
| e (Epsilon) |
Involute rool angle |
| q (Theta) |
Involute polar angle |
| l (Lambda) |
Lead angle |
| r (Rho) |
Radius of curvature |
| f (Phi) |
Pressure angle |
| fn |
Normal pressure angle |
| ft |
Transverse pressure angle |
| y (Psi) |
Helix angle |
| w (Omega) |
Angular velosity |
If you have any questions or have a
particular topic you would like to see discussed here, please contact us.
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The "Tips" Archive |
| January, 2001 |
January, 2002 |
January, 2003 |
January, 2004 |
January, 2005 |
| February, 2001 |
February, 2002 |
February, 2003 |
February, 2004 |
February, 2005 |
| March, 2001 |
March, 2002 |
March, 2003 |
March, 2004 |
March, 2005 |
| April, 2001 |
April, 2002 |
April, 2003 |
April, 2004 |
April, 2005 |
| May, 2001 |
May, 2002 |
May, 2003 |
May, 2004 |
May, 2005 |
| June, 2001 |
June, 2002 |
June, 2003 |
June, 2004 |
June, 2005 |
| July, 2001 |
July, 2002 |
July, 2003 |
July, 2004 |
July, 2005 |
| August, 2001 |
August, 2002 |
August, 2003 |
August, 2004 |
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| September, 2001 |
September, 2002 |
September, 2003 |
September, 2004 |
September, 2005 |
| October, 2001 |
October, 2002 |
October, 2003 |
October, 2004 |
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| November, 2001 |
November, 2002 |
November, 2003 |
November, 2004 |
November, 2005 |
| December, 2001 |
December, 2002 |
December, 2003 |
December, 2004 |
December, 2005 |
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