ISO/TR 14521:2010
Withdrawn
A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.
View Superseded by
Gears Calculation of load capacity of wormgears
Hardcopy , PDF , PDF 3 Users , PDF 5 Users , PDF 9 Users
16-07-2021
French, English
11-11-2010
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ISO/TR 14521:2010 specifies equations for calculating the load capacity of cylindrical worm gears and covers load ratings associated with wear, pitting, worm deflection, tooth breakage and temperature. Scuffing and other failure modes are not covered by ISO/TR 14521:2010.
The load rating and design procedures are valid for sliding velocities over tooth surfaces of up to 25 m/s and contact ratios equal to or greater than 2,1. For wear, sliding velocities over tooth surfaces are not below 0,1 m/s.
The rules and recommendations for the dimensioning, lubricants or materials selected by ISO/TR 14521:2010 only apply to centre distances of 50 mm and larger. For centre distances below 50 mm, method A applies.
The choice of appropriate methods of calculation requires knowledge and experience. ISO/TR 14521:2010 is intended for use by experienced gear designers who are able to make informed judgements concerning factors. It is not intended for use by engineers who lack the necessary experience.
The geometry of worm gears is complex, therefore the user of ISO/TR 14521:2010 is encouraged to make sure that a valid working geometry has been established.
| DevelopmentNote |
Supersedes ISO/DIS 14521. (01/2012)
|
| DocumentType |
Technical Report
|
| Pages |
92
|
| PublisherName |
International Organization for Standardization
|
| Status |
Withdrawn
|
| SupersededBy |
| Standards | Relationship |
| FD ISO/TR 14521 : 2011 FD | Identical |
| NEN NPR ISO/TR 14521 : 2010 | Identical |
| PD ISO/TR 14521:2010 | Identical |
| 11/30235014 DC : 0 | BS EN 13135 - CRANES - SAFETY - DESIGN - REQUIREMENTS FOR EQUIPMENT |
| PD ISO/TR 10828:2015 | Worm gears. Worm profiles and gear mesh geometry |
| EN 13135:2013+A1:2018 | Cranes - Safety - Design - Requirements for equipment |
| ISO/TR 10828:2015 | Worm gears — Worm profiles and gear mesh geometry |
| BS EN 13135 : 2013 | CRANES - SAFETY - DESIGN - REQUIREMENTS FOR EQUIPMENT |
| I.S. EN 13135:2013 | CRANES - SAFETY - DESIGN - REQUIREMENTS FOR EQUIPMENT |
| UNE-EN 13135:2013 | Cranes - Safety - Design - Requirements for equipment |
| DIN EN 13135:2013-05 | CRANES - SAFETY - DESIGN - REQUIREMENTS FOR EQUIPMENT |
| DIN 1709:1981-11 | COPPER ZINC ALLOY CASTINGS (BRASS AND SPECIAL BRASS CASTINGS) |
| DIN 1714:1981-11 | COPPER-ALUMINIUM CASTING ALLOYS (CAST ALUMINIUM BRONZE) - CASTINGS |
| ISO/TR 10495:1997 | Cylindrical gears Calculation of service life under variable loads Conditions for cylindrical gears according to ISO 6336 |
| DIN 1693 : 1961 | |
| ISO 701:1998 | International gear notation Symbols for geometrical data |
| ISO 1122-2:1999 | Vocabulary of gear terms Part 2: Definitions related to worm gear geometry |
| ISO 6743-6:1990 | Lubricants, industrial oils and related products (class L) Classification Part 6: Family C (Gears) |
| ISO 10347:1999 | Worm gears Geometry of worms Name plates for worm gear units centre distances, information to be supplied to gear manufacturer by the purchaser |
| DIN 3974-2:1995-11 | Accuracy of worms and worm gears - Part 2: Tolerances for individual errors |
| DIN 1691:1985-05 | FLAKE GRAPHITE CAST IRON (GREY CAST IRON) - PROPERTIES |
| ISO/TR 10828:2015 | Worm gears — Worm profiles and gear mesh geometry |
| BS 721-2:1983 | Specification for worm gearing Metric units |
| DIN 3974-1:1995-11 | Accuracy of worms and worm gears - Part 1: General bases |
| DIN 1705:1981-11 | COPPER TIN AND COPPER TIN ZINC CASTING ALLOYS (CAST TIN BRONZE AND GUN METAL) - CASTINGS |
| EN 1563:2011 | Founding - Spheroidal graphite cast irons |
| ISO 6336-6:2006 | Calculation of load capacity of spur and helical gears Part 6: Calculation of service life under variable load |
| ISO/TR 10064-4:1998 | Code of inspection practice Part 4: Recommendations relative to surface texture and tooth contact pattern checking |
| EN 1982:2017 | Copper and copper alloys - Ingots and castings |
| EN 1561:2011 | Founding - Grey cast irons |
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