Belt tensioning procedures

Product catalog summary

Overview: This document provides technical specifications and procedures for using the MacFrame Tensioning Tool and associated torque wrenches. It includes detailed instructions for verifying belt pre-tension in actuators using various belt types and sizes.

Specifications:

MacFrame Tensioning Tool: Part #399-25 is used for 12mm and 25mm belts, and Part #399-50 is for 50mm belts. These tools are used in conjunction with a Pound Inch Torque Wrench.
Torque Wrench: Part #397 with a range of 25-250 lbs-in (3.61 to 29.03 N•M).

Procedures:

To verify belt pre-tension, the document provides graphs showing the relationship between actuator pulley center distance and the torque required to reach preload for different belt types and sizes.
For example, for an actuator using a 25S belt with a pulley center distance of 3300 mm, the required torque is 13,390 Nmm or 118 Lb-in.

Graph Analysis:

The graphs illustrate the torque required to achieve preload for various belt types (12S, 12H, 25S, 25H, 50S, 50H) and pulley sizes (40 and 80).
Each graph provides data in both metric (Nmm) and imperial (Lb-in) units, allowing users to determine the appropriate torque settings based on their specific actuator configurations.

Recommendations:

Users must ensure the suitability of Macron Dynamics products for their specific applications. While defective products will be replaced, no liability is assumed beyond replacement.

Catalog excerpts

P AR T NO. DESCRIPTION #399 - 25 (For 12&25mm)Used in conjunction with Pound Inch Torque Wrench#399 - 50 (For 50mm) >

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Belt tensioning procedures

Belt tensioning procedures

Catalog excerpts

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