description
Tolerance Specification for Shaper Cutters
ANSI/AGMA 1104-A09 (reaffirmed February 2015)
ANSI/AGMA 1104-A09 (reaffirmed February 2015)

SCOPE
This standard covers types, sizes, tolerances, marking and nomenclature for finishing and pre-finishing type shaper cutters for generating involute spur and helical gears, splines and serrations.

Also provided are informational annexes containing reference tolerance tables, shaper cutter tool tolerance tables, suggested rack shaper cutter specifications, and gear shaping manufacturing terminology.

EQUATIONS FOR TOLERANCES
Equations for tolerances and their ranges of validity are provided in clause 6 for the defined accuracy of shaper cutters.  In general, these tolerances cover the following ranges:

  • 5 ≤ zc ≤ 200
  • 5 mm ≤ dT ≤ 350 mm
  • 0.5 ≤ mn ≤ 35
  • 4 mm ≤ bc ≤ 50 mm
  • β ≤ 45°

where

  • dT is reference diameter, mm;
  • mn is normal module;
  • bc is facewidth (axial);
  • zc is number of teeth in cutter;
  • β is helix angle.

FOREWORD
[The foreword, footnotes and annexes, if any, in this document are provided for informational purposes only and are not to be construed as a part of ANSI/AGMA Standard 1104-A09, Tolerance Specification for Shaper Cutters]

This standard was developed after intensive study of existing practices, standards and literature.  In general, the information in this standard is a consolidation of the most common practices and standards currently in existence.

An effort was made to incorporate ANSI/AGMA 2015-1-A01 gear tolerances in the development of this standard.

The first draft of ANSI/AGMA 1104-A09 was made in April, 2004.  It was approved by the AGMA membership in March, 2009.  It was approved as an American National Standard on May 14, 2009.

Suggestions for improvement of this standard will be welcome.  They should be sent to the American Gear Manufacturers Association, 1001 N. Fairfax Street, 5th Floor, Alexandria, Virginia  22314.

NORMATIVE REFERENCES
The following standards contain provisions which, through reference in this text, constitute provisions of this American National Standard.  At the time of publication, the editions indicated were valid.  All standards are subject to revision, and parties to agreements based on this American National Standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below.

  • AGMA 915-1-A02, Inspection Practices - Part 1:  Cylindrical Gears  - Tangential Measurements
  • AGMA 915-3-A99, Inspection Practices - Gear Blanks, Shaft Center Distance and Parallelism
  • ANSI/AGMA 1012-G05, Gear Nomenclature, Definitions of Terms with Symbols
  • ANSI/AGMA 2015-1-A01, Accuracy Classification System - Tangential Measurements for Cylindrical Gears
  • ANSI/AGMA ISO 18653-A06, Gears - Evaluation of Instruments for the Measurement of Individual Gears
  • ASME B5.10:1994, Machine Tapers
  • DIN 228 P1:1987, Morse Tapers and Metric Tapers; Taper Shanks
  • ISO 286-2:1988, ISO system of limits and fits - Part 2:  Tables of standard tolerance grades and limit deviations for holes and shafts
  • ISO/TR 10064-4:1998, Code of Inspection Practice - Part 4: Recommendations Relative to Surface Texture and Tooth Contact Pattern Checking
  • MIL-STD-105D, Sampling Procedures and Tables for Inspection by Attributes
ISBN: 978-1-55589-974-5 Pages: 54
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