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Synchronous

Product catalog summary

Overview: This document provides comprehensive specifications and guidelines for timing pulleys and synchronous drives, focusing on different types of pulleys and their applications in mechanical systems.

Sections:

Timing Pulleys (K-2 to K-21): Discusses terminology, specifications, and types of timing pulleys, including XL, L, H, and XH categories. It emphasizes the importance of pitch in selecting timing pulleys and provides guidelines on pulley diameters and flanged pulleys for optimal performance and longevity.
HTS® Synchronous Sprockets (K-22 to K-41): Provides details on HTS® sprockets, including various pitch sizes (5mm, 8mm, 14mm, 20mm). It includes engineering data and recommendations for sprocket diameters to ensure compatibility with timing belts.
MPC™ Synchronous Sprockets (K-42): Offers brief information on MPC™ sprockets, highlighting their use in high-performance applications.
High HP HTS® Synchronous Sprockets (K-43 to K-46): Focuses on high horsepower applications, detailing specifications for 8mm and 14mm pitch sprockets.
Notes (K-47 to K-48): Provides additional notes and clarifications on the use and selection of timing pulleys and sprockets.

Key Terminology:

Pitch: The distance between groove centers on the pulley and tooth centers on the belt, crucial for compatibility.
Flanged Pulleys: Used to prevent belts from riding off, especially in vertical or long-distance applications.
Minimum Pulley Diameters: Recommendations for minimum diameters to avoid reduced belt life due to flex fatigue.

Recommendations: Ensure matching pitch between belts and pulleys, use flanged pulleys where necessary, and adhere to minimum diameter guidelines to maximize belt life and drive efficiency.

Specifications and Data: The document provides detailed specifications for HTS® sprockets and pulleys, including dimensions, weight, and compatibility with various belt types. It includes tables listing the number of teeth, diameters in millimeters and inches, and other critical measurements for different sprocket models.

Drive Alignment: Proper drive alignment is crucial to prevent belt damage and ensure efficient operation. The document outlines the importance of avoiding misalignment, which can lead to inconsistent belt wear and premature failure. It describes parallel and angular misalignment and provides guidelines for checking alignment using a straight-edge tool.

Installation and Tensioning Allowances: Advises against fixed center drives and provides installation allowances to prevent belt damage. It includes a Distance Allowance Chart for standard installation and tensioning allowances, emphasizing the need for proper tensioning to avoid excessive wear.

Belt Tensioning and Deflection Force: Instructions are provided for measuring belt span and applying the correct force to achieve the desired deflection. A table lists the required force for different belt pitches and widths, ensuring optimal tensioning for various applications.

MPC™ and High HP HTS® Sprockets: Introduces MPC Synchronous Sprockets compatible with Poly Chain® GT®2 and Falcon Pd™ belts, available in various pitches and widths. It highlights the flexibility and cost-effectiveness of High HP HTS Sprockets, designed for high horsepower applications.

Conclusion: This technical document serves as a comprehensive guide for selecting, installing, and maintaining HTS® sprockets and pulleys, ensuring optimal performance and longevity in various industrial applications.

Catalog excerpts

Index SECTION K SYNCHRONOUS DRIVES

Open the catalog to page 1

Stock Timing Pulleys STOCK TIMING PULLEYS ′ ′ 1/5′′ - 7/8′′ PITCH QD — TAPER BUSHED AND STOCK BORE Taper Bushed Stock Bore PITCH IN. ⁄5″ PULLEY DESIGNATION Martin Timing Pulleys are manufactured to extremely close specications and are stocked in minimum plain bore, Taper Bushed and Q.D. bushed styles depending on size and pitch. See tables for stock pulley types. Bushings are priced separately and must be added to pulley price. Illustrations below indicate stock pulley construction type listed in tables. “F” designation in pulley type means pulley is anged. When drive center distance is eight...

Open the catalog to page 2

Timing Pulley Terminology Timing belts and pulleys — in order to handle a wide range of loads, speeds and applications at highest possible efciencies — are made in ve stock pitches. Circular pitch (usually referred to as pitch) is a basic consideration in the selection of timing pulleys as with gear and chain drives. Pitch is the distance between groove centers and is measured on the pulley pitch circle. On the belt, pitch is the distance between tooth centers and is measured on the pitch line of the belt. The pitch line of the belt is located within the tension member and coincides with the...

Open the catalog to page 3

Timing Pulley Terminology Timing Pulleys Timing pulleys have evenly spaced axial grooves cut in their periphery to make correct, positive engagement with the mating teeth of the belt. These pulleys are designed so that the teeth of the belt enter and leave the grooves with negligible friction. All pulleys, stock and made-to-order, have minimum tooth-to-groove clearance (backlash). The pulley’s pitch diameter will always be greater than its outside diameter. Pulleys are available in a wide range of stock widths and diameters. Minimum Pulley Diameters pitch recommended minimum* pitch diam. in....

Open the catalog to page 4

Stock Timing Pulleys Type AF Dash 1 = Solid Style Dash 2 = Web Style Dash 3 = Arm/Spoke Style “F” type description indicates anged. XL 037 For Belts 1⁄4″ and 3⁄8″ Wide Minimum Plain Bore No. Teeth Part Number Pitch Diam. Note: XL Pulleys stocked min. plain bore with 2 setscrews @ 90˚. If keyway is used, reduce max. bore by twice keyway depth. Pulley O.D. = P.D. – .02″.

Open the catalog to page 5

Stock Timing Pulleys L050 For Belts 1⁄2″ Wide Minimum Plain Bore Part Number L Pulleys 10 - 16 teeth min. plain bore stocked with 1 set screw. If keyway is used, reduced maximum bore by twice keyway depth. Dimensions in inches. Weight in pounds Pulley O.D. = P.D. – .03″ L050 For Belts 1⁄2″ Wide (3⁄8″ Pitch) QD Type No. Teeth Part Number Pitch Diam. Dimensions in inches. Weight in pounds Pulley O.D. = P.D. – .03″ *Reverse mount drilled only +Bushing Projects 1⁄16 on Small End. Bore Range L050 Taper Bushed on Page K7

Open the catalog to page 6

Stock Timing Pulleys Type CF L050 For Belts 1⁄2″ Wide (3⁄8″ Pitch) Taper Bushed Type Part Number Dash 1 = Solid Style Dash 3 = Arm/Spoke Style Pitch Diam. Bore Range Dimensions in inches. Weight in pounds Pulley O.D. = P.D. – .03″ L075 For Belts 3⁄4″ Wide (3⁄8″ Pitch) Minimum Plain Bore Part Number Pitch Diam. Dimensions in inches. Weight in pounds. Pulley O.D. = P.D. – .03″ L Pulleys 12 - 16 teeth min. plain bore stocked with 1-SS. If keyway is used, reduce maximum bore by twice keyway depth.

Open the catalog to page 7

Stock Timing Pulleys L075 For Belts 3⁄4″ Wide (3⁄8″ Pitch) QD Type Part Number Pitch Diam. Bore Range Bore Range Dimensions in inches. Weight in pounds Pulley O.D. = P.D. – .03″ *Reverse mount only L075 For Belts 3⁄4″ Wide (3⁄8″ Pitch) Taper Bushed Type No. Teeth Part Number Pitch Diam. Dimensions in inches. Weight in pounds Pulley O.D. = P.D. – .03″

Open the catalog to page 8

Stock Timing Pulleys L100 For Belts 1″ Wide (3⁄8″ Pitch) Minimum Plain Bore Part Number Pitch Diam. Dimensions in inches. Weight in pounds Pulley O.D. = P.D. – .03″ L Pulleys 14 - 16 teeth min. plain bore stocked with 1-S.S. If keyway is used, reduce maximum bore by twice keyway depth. L100 For Belts 1″ Wide (3⁄8″ Pitch) QD Type Part Number Pitch Diam. Bore Range Dimensions in inches. Weight in pounds Pulley O.D. = P.D. – .03″ *Reverse mount only

Open the catalog to page 9

Stock Timing Pulleys Dash 1 = Solid Style E Dash 3 = Arm/Spoke Style K “F” in type description indicates anged. L100 For Belts 1″ Wide (3⁄8″ Pitch) Taper Bushed Type No. Teeth Part Number Pitch Diam. Bore Range Dimensions in inches. Weight in pounds Pulley O.D. = P.D. – .03″

Open the catalog to page 10

Stock Timing Pulleys H100 For Belts 3⁄4″ and 1″ Wide (1⁄2″ Pitch) Minimum Plain Bore F = 15⁄16 Bore Part Number Pitch Diam. Dimensions in inches. Weight in pounds Pulley O.D. = P.D. – .054″ H100 For Belts 3⁄4″ and 1″ Wide (1⁄2″ Pitch) QD Type F = 15⁄16 No. Teeth Part Number Pitch Diam. Bore Range Dimensions in inches. Weight in pounds Pulley O.D. = P.D. – .054″ *Reverse mount only

Open the catalog to page 11

Stock Timing Pulleys Dash 1 = Solid Style Dash 3 = Arm/Spoke Style “F” in description indicates anged. H100 For Belts 3⁄4″ and 1″ Wide (1⁄2″ Pitch) Taper Bushed Type F = 15⁄16 No. Teeth Part Number Pitch Diam. Bore Range Dimensions in inches. Weight in pounds Pulley O.D. = P.D. – .054″

Open the catalog to page 12

Stock Timing Pulleys Type AF Dash 1 = Solid Style Dash 3 = Arm/Spoke Style “F” in type description indicates anged. H150 For Belts 11⁄2″ Wide (1⁄2″ Pitch) Minimum Plain Bore Part Number Pitch Diam. Dimensions in inches. Weight in pounds Pulley O.D. = P.D. – .054″

Open the catalog to page 13

Stock Timing Pulleys H150 For Belts 11⁄2″ Wide (1⁄2″ Pitch) QD Type No. Teeth Part Number Pitch Diam. Bore Range Dimensions in inches. Weight in pounds Pulley O.D. = P.D. – .054″ *Reverse mount only H150 For Belts 11⁄2″ Wide (1⁄2″ Pitch) Taper Bushed Type No. Teeth Part Number Pitch Diam. Dimensions in inches. Weight in pounds Pulley O.D. = P.D. – .054″ Bore Range

Open the catalog to page 14

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