Technical Gear Information

Omni Gear & Machine - For all your gearing needs.

AGMA Member

Omni Gear and Machine Corporation
90 Bissel Street
Joliet, Illinois 60432
Toll Free: (800) 876-7216
Fax: (815) 723-9207
Hours: Mon.-Fri. 7:00AM-4:30PM
Sat. 7:00AM-noon

Omni Gear & Machine Corporation

For All Your Gearing Needs

Technical Gear Information Index

Note:- These Technical pages are best viewed using Internet Explorer, Netscape will not displayed special characters in some tables. Printer friendly versions will print on a single page in most cases if the page margins are set to .5" or less (File>Page Setup... Margins).

Rules & Formulas

	Symbol for Rules & Formulas
	Diametral Pitch Spur Gears
	Circular Pitch Spur Gears
	Worm Gears
	Helical Gears
	Involute Splines & Serrations 30° PA
	Standard SAE Parallel Key Spline
	Point Width Conversion for Straight Sided Spline

Gear Verniers

	Gear Tooth Verniers
	Chordal Thickness & Chordal Addendum of Gear Teeth

Stub Involute Function

	Method of Producing Stub Depth Gear & Splines
	The Inverse of the Involute Function

Wire Measurements

External Spur Gears

	Determining Dimension Over Pins
	Determining Arc Teeth Thickness Given Dimensions Over Pins

Internal Spur Gears

	Determining Dimension Under Pins
	Determining Arc Space Width Given Dimensions Under Pins

External Helical Gears

	Determining Dimensions Over Pins or Balls
	Determining Tooth Thickness of External Helical Gear With Dimension Over Pins or Balls

Internal Helical Gears

	Determining Dimensions Under Pins or Balls
	Determining Space Thickness Given Dimensions Under Pins or Balls

Span Measurements

	Span Measurements 14-1/2° PA
	Span Measurements 20° PA
	Span Measurements 25° PA
	Span Measurements 30° PA

Tooth Dimensions

Standard Tooth Dimensions

	Tooth Chart, 2.157/DP System DP
	Tooth Chart, 2.25/DP System DP
	Tooth Chart, 2.20/DP + .002 System DP
	Tooth Chart, 2.15/DP System CP
	Tooth Chart Module, 2.25/DP Depth System

Timing Belt Chains & Sprockets

	American Standard Timing Belts
	Full Radius Timing Belt

Synchroflex Timing Belts

	Tooth Forms for Both T & AT Versions (T versions)
	Tooth Forms for Both T & AT Versions (AT versions) Omni Gear does not sell Belts.

DIN7721 Chain & Sprockets

	Synchroflex O.D., "T" & "AT" Chart
	Design Formulas for ASA Roller Chain Sprockets

Cycliodal Sprocket Chains & Sprockets

	Original Method of Developing Cycloidal Tooth Form
	Original Method of Developing Cycloidal Tooth Form (cont'd)

Conveyor Chain Chains & Sprockets

	Conveyor Chain (Pitch Diameter, Maximum Outside & Bottom, Diameter for Normal Range of Sprocket Teeth Available with a Type A Tooth Form Sprocket)
	Sprocket Tooth Form Type A Radius Tooth Form
	Sprocket Tooth Form Type B Straight Face Tooth Form

Straight Sided Serrations

	Serrated Shaft Ends - SAE J500
	British Straight-Sided Serration Standard
	British Straight-Sided Serration Standard (cont'd)

Involute Splines

Old American Standard

ANSI B92.1-1970

	Flat Root Major Diameter Fit
	Fillet Root Side Fit
	Flat Root Side Fit

ANSI B92.1-1970 Formulas for the Basic Dimensions 30°, 37.5° & 45° PA

ANSI B92.1-1970 Maximum Tolerance for Space Width & Tooth Thickness of Tolerance Class 5 Splines

ANSI B92.1-1970 Interchangeability

Internal Major Diameters 8/16 DP & 10/20 DP, 30° PA

Internal Major Diameters 12/24 DP & 16/32 DP, 30° PA

Internal Major Diameters 37-1/2° & 45° PA (Full Fillet Side Fit)

DIN 5480 Inv. Splines

Module-DIN 5480 Flat Root Involute Splines

DIN 5481 55° Inc.

DIN 5481 Serration -- 55° Included

DIN 5481 60° Inc.

DIN 5481 Serration -- 60° Included

DIN 5482 Inv. Splines

Module-DIN 5482 Involute Spline Profile Dimensions

JIS Inv. Splines

	Involute Spline for Automobiles (Japanese Industrial Standard)
	Involute Spline for Automobiles (Japanese Industrial Standard, cont'd)

External Parallel Spline

American Standard Parallel Splines

Internal Parallel Spline

American Standard Parallel Splines

Parallel Splines

	Metric Parallel Spline Shaft Connections DIN 5462
	Metric Parallel Spline Shaft Connections DIN 5463

Quick Reference Depth Charts

Base Pitch Chart

Helical Gear Conversion Chart

	Circular Pitch Conversion Chart
	Involute Spline Chart

Point Width Charts

	Roller Chain Sprocket
	Module Conversion Chart

Fine Pitch Spur & Helical Master Gears Arbor Mounted Type

	Master Gears
	Classification by Composite Tolerance

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