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New English version Design Guide
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New English version Design Guide - 1

Design Guide and Engineer’s Reference for Metal Belts

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New English version Design Guide - 2

Belt Technologies helps our client companies achieve optimal performance from machinery for precision positioning, timing, conveying, power transmission, packaging, and automated manufacturing operations. For more than 25 years, we have provided a comprehensive resource for application-specific design and manufacture of metal belts, metal tapes, and pulleys. Metal belts possess many unique properties that result in superior precision, control, longevity, and cost effectiveness. In many cases they are preferable to other belt types (such as rubber and fiberglass) and other...

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New English version Design Guide - 3

3 WHY CONSIDER METAL BELTS FOR YOUR APPLICATION Belt Technologies has produced this Design Guide to give engineers a reference publication detailing fundamentals of metal belt design and application, with topics including: 7 SURFACE TREATMENTS Teflon Neoprene or Urethane Silicone Hard Coat Anodize Options 8 - 14 DESIGN CONSIDERATIONS System Design Guidelines Loading Accuracy Positioning Accuracy Repeatability Belt Tracking Timing Tensioning System Frame Stiffness Reverse Bends Cantilevered Shafts Magnetic Permeability Belt Sag Elevated Temperatures Belt Creep Design Imposed Restrictions...

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New English version Design Guide - 4

METAL BELTS, DRIVE TAPES & APPLICATIONS CHAPTER 2 PLAIN BELTS: BELTS WITH ATTACHMENTS: COMBINATION BELTS/TAPES: Plain metal belts are created by welding together two ends of a metal tape to form an endless belt. High energy beam welding techniques, pioneered in the space program, form a high integrity butt weld that is extremely strong and smooth. Some typical plain metal belt applications include: Perforated metal belts can also be fitted with precision machined, cast, or molded attachments to provide unsurpassed positional accuracy and repeatability, to act as a product transport device,...

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New English version Design Guide - 5

TYPES OF PULLEYS: Even with all the variations in form, material, and design features, pulleys generally serve one of two purposes: friction driving or timing. Figure 6. Pocketed and Ball Bearing Pulleys Friction Drive Friction drive pulleys are generally flat faced with no timing element. Crowning pulley faces is not generally recommended. To discuss the reasons why, please contact a Belt Technologies engineer who is familiar with metal belt dynamics. When crowning is appropriate, two geometries may be used: full radius and trapezoidal. A full radius crown is less stressful on the belt,...

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New English version Design Guide - 6

DESIGN CONSIDERATIONS NOTE TO THE DESIGNER: With information from previous sections, you may have begun thinking about the design for your metal belt. This section builds on the previous sections by incorporating elements which will help you optimize system performance. Since every design is unique, it is not possible to discuss every design consideration. You are invited to review your design ideas, numbers, and methods with a Belt Technologies engineer. SYSTEM DESIGN GUIDELINES: Any system with metal belts is generally enhanced by following these guidelines: • Use as few pulleys as...

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New English version Design Guide - 7

DESIGN CONSIDERATIONS CHAPTER 5 DESIGN CONSIDERATIONS BELT LENGTH ACCURACY: BELT STRETCH: ZERO BACKLASH: One of the most important advantages of a metal belt is its overall accuracy. Perforated belts or belts with attachments can be fabricated with pitch accuracies of ±0.0005” Plain belts and drive tapes can also . be fabricated to a high degree of accuracy. Metal belts are unique, as they will not stretch in normal operation, after achieving a normal preload tension. To calculate preload stretch for a plain belt, use the following equation. For perforated belts, please contact a Belt...

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New English version Design Guide - 8

DESIGN CONSIDERATIONS Pulley Axis Adjustment: Crowning Friction Drive Pulleys When crowned friction drive pulleys must be used, it is in conjunction with—not in place of—axis adjustment. This is because crowned pulleys will not self-center a metal belt. Crowned pulleys work best on thin belts as the belt web must conform to the crowned face of the pulley. While increased tension can be used to achieve belt to pulley face conformity, tension cannot be so high as to cause permanent belt deformation. The best face geometry for a crowned pulley is a full radius, with the crowning being no more...

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New English version Design Guide - 9

DESIGN CONSIDERATIONS ELEVATED TEMPERATURES: Ultimate Tensile Strength, ksi Particularly demanding applications, such as those involving high temperatures, extremely corrosive environments, or unusual electrical or magnetic requirements may preclude the use of certain alloys for metal belts and drive tapes. The following Materials Table summarizes important selection criteria. Inconel® 718 Solution Annealed and Heat Treated DESIGN IMPOSED RESTRICTIONS: Table 4. Elevated Temperature Characteristics of Principal Alloys Belt Creep is a phenomenon associated with power transmission between a...

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New English version Design Guide - 10

Complete the design checklist on-line at: www.belttechnologies.com/englishguiderequest.htm STEEL BELT DESIGN CHECKLIST Use additional sheets for further information, if appropriate Belt Technologies Europe 4th Floor, Pennine House Washington Tyne and Wear NE37 1LY United Kingdom Tel: +44 (0)191-415-3010 Fax: +44 (0)191-415-0333 E-Mail: sales@bte.co.uk www.belttechnologies.co.uk Belt Technologies, Inc. Corporate Headquarters 11 Bowles Road Agawam, MA 01001 USA Tel: (413) 786-9922 Fax: (413) 789-2786 E-Mail: engineer@belttechnologies.com www.belttechnologies.com FROM:...

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New English version Design Guide - 11

In the Americas: Belt Technologies, Inc. Corporate Headquarters 11 Bowles Road Agawam, MA 01001 USA Tel: (413) 786-9922 Fax: (413) 789-2786 E-Mail: engineer@belttechnologies.com www.belttechnologies.com In the U.K. , Europe & the Pacific Rim: Belt Technologies Europe 4th Floor • Pennine House Washington Tyne and Wear NE37 1LY United Kingdom Tel: +44 (0)191-415-3010 Fax: +44 (0)191-415-0333 E-Mail: sales@bte.co.uk www.belttechnologies.co.uk

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