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Browning HVAC Belt Drives & Bearings Reference Pocket Guide Catalog

Browning HVAC Belt Drives & Bearings Reference Pocket Guide Catalog

Product catalog summary

Introduction

This guide provides detailed information on belt drives and bearings, focusing on V-belts used in the HVAC industry. It covers specifications, maintenance procedures, and recommendations for enhancing efficiency and performance.

Specifications

The document details various V-belt types, including 3V, 5V, 8V, and classical belts like 'A', 'B', and 'C'. Each type is specified by dimensions to enhance performance and increase horsepower capacity in shorter center drives.

Energy Efficiency

Upgrading from wrapped to notched belts can significantly improve efficiency. The guide includes a cost analysis of efficiency drops in belt-driven applications, highlighting the financial benefits of maintaining optimal efficiency.

HVAC Monitoring Services

Browning offers services to optimize HVAC systems by monitoring energy usage, bearing and belt temperature, and shaft speeds to identify efficiency upgrade opportunities.

EPDM V-Belts

EPDM V-belts offer a wider operating temperature range (-60°F to 250°F) compared to industry standards, enhancing durability and performance in extreme conditions.

Maintenance and Installation

The guide outlines preventive maintenance steps for V-belt drives, including safety precautions, belt selection, and inspection of drive elements and sheaves. It emphasizes not mixing new and used belts and ensuring proper alignment and tensioning.

Technological Features

Advanced features of Browning V-belts include improved cord adhesion, wider notch spacing, and tubular fabric for enhanced flexibility and performance. The Tenso-set® motor base automatically maintains belt tension, reducing maintenance time and improving safety.

Conclusion

The guide emphasizes the importance of regular maintenance and the use of advanced materials and technologies to ensure the longevity and efficiency of belt drives in HVAC systems.

Preventive Maintenance and Installation of V-Belt Drives

Installing New Belts: Ensure the slack of each belt is on the same side by pressing the belts with your hand. Loosen the drive take-up in advance to facilitate this process. Avoid forcing belts onto sheaves; instead, move sheaves apart until belts are seated in the grooves. Tighten the drive until slack is taken up.

Sheave Alignment: While perfect alignment is not critical, better alignment improves performance. Sheaves should be mounted close to bearings to avoid excessive loads.

Applying Tension: Proper tension is crucial for the wedging action of the belt against the groove sidewall. The best tension is the least at which the drive will not slip under peak load. Use a belt tension checker for accuracy.

Rechecking Alignment and Starting Drive: After installation, recheck alignment and start the drive. Check tension after 8, 24, and 100 hours, and periodically thereafter. Properly designed V-belt drives should not squeal under peak load conditions.

Corrective Maintenance and Troubleshooting:

Common Issues: Misaligned sheaves, worn or damaged sheaves, and improper tension can lead to rapid wear, slippage, and vibration. Misalignment should be within a tolerance of 1/2° on notched belts and ±2° on wrapped belts.

Sheave and Shaft Misalignment: Three types of misalignment include horizontal angular, vertical angular, and parallel. Each requires specific checking and correction methods.

Worn or Damaged Sheaves: These can cause over-tensioning, leading to overheated bearings and shaft damage. Sheave templates can help check grooves for wear.

Excessive Tension: Can affect belts, bearings, and shafts. Apply only enough tension to prevent slipping during startup or peak loading.

Troubleshooting Installation Problems: Issues such as prying belts onto sheaves, misplaced slack, and rubbing against guards can cause belt damage. Proper installation techniques are crucial for long service life.

Troubleshooting Selection Problems: Using the wrong V-belt cross-section or type can lead to inefficiencies. Ensure the correct type is applied to your application.

Horsepower Ratings and Belt Selection

The document discusses the horsepower ratings of belts, which range from 2.2 HP to 11.9 HP per belt on a 5" diameter sheave with a 1750 RPM motor. It emphasizes the importance of not mixing mismatched belts or different brands, as they may not deliver the expected service life due to slight dimensional differences and construction variations.

Troubleshooting Selection Problems

Section 2B addresses issues such as mismatched belts, machine-induced vibrations, and the benefits of using banded V-belts to reduce whipping. It highlights the importance of checking for misalignment and sheave wear when belts appear mismatched.

V-Belt Selection Guide

The guide provides information on generic belt types, normal horsepower ranges, maximum belt speeds, temperature ranges, and resistance properties. It categorizes belts based on their applications, such as general-purpose heavy-duty industrial drives and high-performance compact industrial drives.

Troubleshooting Environmental Problems

Section 2C focuses on the impact of environmental conditions on V-belts. It provides guidelines for proper storage, addressing excessive heat, oil or grease exposure, and the effects of abrasive conditions. It also advises against using "belt dressings" and emphasizes the importance of shielding drives from foreign objects and moisture.

Troubleshooting Design Problems

Section 2D discusses design-related issues such as underbelting and overbelting, the effects of using small sheaves, and the problems caused by insufficient wrap on small sheaves. It provides recommendations for addressing these issues, including consulting with Browning Application Engineering for proper tensioning values.

Design and Installation Suggestions

The document concludes with design and installation suggestions for Browning® Gripbelt® "V" Drives. It outlines primary conditions for satisfactory drive design, such as center distance adjustment, arc of contact, belt speed limitations, and considerations for overload capacity and temperature effects.

Design and Installation Suggestions

Ensure shafts are parallel and sheaves are aligned; check alignment after eight hours of operation.
Avoid forcing belts over sheaves to prevent breakage; refer to tables on pages 38 and 39 for guidance.
Maintain proper belt tension, ensuring the tight side is straight and the slack side has a slight bow; recheck tension after eight hours.
Replace worn sheaves to prevent premature belt failure.
Store extra belts in a cool, dark, dry place and replace entire sets of belts to avoid mixing old and new belts.

Minimum Center Distance Allowance for Belt Installation and Take-Up

Tables 1 and 1A provide allowances for installation, initial tensioning, and subsequent take-up for various belt numbers.

Basic Drive Selection Procedure

Selections are based on horsepower ratings for single belts, not corrected for arc of contact, belt length, or ratio.
Drive calculations are based on motors or smaller sheaves operating at 1750 RPM.

Application Characteristics

Low horsepower applications are ideal for fan applications using FHP V-belts.
Medium horsepower applications are suited for industrial applications requiring single or multiple V-belt drives.
High horsepower applications transmit more horsepower than comparable belts, allowing for more compact drive systems.

Overload Service Factors

Drives must be designed for maximum load conditions to prevent premature belt failure.
Suggested overload service factors are provided for various typical driven units.

Datum System

The Datum System specifies the Datum Diameter as the effective diameter for determining the pitch length of the belt for center distance calculation.

Belt Velocity

Belt velocity is calculated using the formula: Belt Velocity in Feet per Minute (FPM) = D.D. or P.D. of Sheave × .2618 × Speed of Sheave (RPM).

Center Distance and Belt Length Interpolation

For every inch of belt length difference, there is approximately a 1/2 inch center distance change. Interpolation examples are provided for calculating center distances based on belt lengths.

Specifications and Calculations:

The document provides a formula for calculating the pitch length of a belt, which is essential for determining the correct belt size for a drive system. The formula is: L = 2C + 1.57(D + d) + (D – d)^2 / 4C, where L is the pitch length, C is the center distance, D is the datum or pitch diameter of the large sheave, and d is the datum or pitch diameter of the small sheave.

Driven Speed Variations:

V-Belt drives may experience speed variations due to factors such as motor speed changes, load variations, and manufacturing tolerances. For precise speed requirements, consulting with Application Engineering or using the Browning EDGE Selection Program is recommended.

Belt Section Selection:

The document includes a Belt Section Selection Chart that helps in choosing the appropriate belt section based on horsepower requirements. It also provides correction factors for belt length and loss in arc of contact to adjust horsepower ratings.

Tensioning Guidelines:

Proper tensioning is crucial for belt performance. The document outlines general rules for tensioning, emphasizing the importance of maintaining the lowest tension that prevents slipping under peak loads. It also provides a detailed procedure for measuring and adjusting belt tension using a tension checker.

Advantages of V-Belt Drives:

V-belt drives offer several advantages, including ruggedness, cleanliness, efficiency, smooth operation, and the ability to dampen vibrations. They also act as a safety mechanism by not transmitting severe overloads.

Product Information:

The document highlights Browning's extensive range of V-belts and sheaves, including the "CODE 1" one-match belt system for easy selection. It also mentions the availability of matched belts for precision requirements.

Overview: The document provides detailed specifications for various types of belts, including Super Gripbelt, Gripnotch, and FHP belts. Each section includes tables listing belt numbers, lengths, and weights, along with key features and construction details.

Super Gripbelt Belts:

These belts are static conducting.
Tables list belt numbers with corresponding lengths and weights.

Gripnotch Belts:

Features include precision molded raw edge construction, more horsepower in less space, deep molded notches, oil and heat resistance, and static conducting properties.
Tables provide belt numbers, lengths, and weights.

FHP Belts:

Characterized by wrapped construction for smooth, quiet operation, and formulated for flexibility with smaller diameter sheaves.
They are oil and heat resistant and static conducting.
Tables detail belt numbers, lengths, and weights.

Overview: This document provides technical specifications and cross-reference tables for various types of belts and sheaves used in mechanical applications. It includes details on belt types, dimensions, weight, and interchangeability, as well as information on sheaves and bushings.

Specifications:

Belts: The document lists different belt types such as 3VX, 5VX, 8V, 4L, A, AX, 5L, B, and BX. Each belt type is accompanied by its part number, outside length, and weight in pounds.
Sheaves: Information on single and two-groove sheaves for "4L" or "A" belts is provided, including diameter, weight, and compatibility with "3L" belts. The document also specifies stock sizes and bore options.

Procedures:

Cross-Reference: The document includes cross-reference tables for substituting belts. For example, a 4L230 belt can be interchanged with an A21 or AX21, but not vice versa.

Norms and Recommendations:

Material Properties: Belts are described as oil and heat resistant, capable of delivering more horsepower in less space, and static conducting.
Usage Guidelines: Specific sheaves should not be used with certain bore sizes when using gripnotch™ belt ratings.

Key Data from Tables:

Gripbelts® and Gripnotch®: The table lists part numbers, outside lengths, and weights for various belt types.
Cross-Reference Tables: These tables provide substitution options for belts, indicating which belts can be interchanged based on length and type.
Sheaves: Tables provide detailed dimensions and weight for single and two-groove sheaves, including stock sizes and bore options.

Critical Information:

Interchangeability: The document emphasizes the importance of correct belt substitution to ensure compatibility and performance.
Sheave Selection: Proper selection of sheaves based on belt type and bore size is crucial for optimal performance.

Overview: The document provides detailed specifications and stock sizes for cast iron sheaves, specifically focusing on single and two groove sheaves compatible with '4L' or 'A' belts and '5L' or 'B' belts. It includes tables listing part numbers, diameters, weights, and bore sizes.

Specifications: The document outlines the dimensions and weights of various sheaves, categorized by part numbers. It specifies the outside diameter, datum 'A' and 'B', and the weight in pounds for each sheave. The sheaves are designed for use with specific belt types and are not compatible with 'B' gripnotch™ belt ratings.

Stock Sizes: The tables provide a comprehensive list of stock sizes for both single and two groove sheaves. Each entry includes the part number, diameter, and weight, along with the bore sizes marked with 'X' to indicate availability. The tables also specify the use of split taper bushings and special keys for certain sizes.

Interchangeability: The document includes a section on stock sheave interchange, comparing sheaves from different manufacturers like Browning, Maurey, TB Wood’s, Dodge, and Maska. It provides equivalent part numbers for sheaves from these manufacturers, facilitating easy interchangeability.

Gripbelt® Sheaves: Specifications for Gripbelt® sheaves with split taper bushings are detailed, including part numbers, diameters, weights, and compatibility with '5V' belts. The tables list the dimensions and weights for one, two, three, and four groove sheaves, along with the corresponding bushings.

Key Points: - Do not use 'BK' sheaves with 'B' gripnotch™ belt ratings. - Part numbers are specified by 'H' and bore size. - Special keys are provided for certain sizes to fit standard depth keyseats. - The document provides a detailed interchange guide for sheaves from various manufacturers.

Overview: The document provides detailed specifications and guidelines for variable pitch cast iron sheaves and split taper bushings, along with air handling solutions and mounting instructions for bearings.

1. Variable Pitch Cast Iron Sheaves:

Single and two-groove sheaves are available for various belt types including "3L", "4L", "5L", "A", "B", and "5V".
Tables provide stock sizes, finished bore dimensions, and weight specifications for different part numbers.
Sheaves are designed to accommodate different belt types with specific diameter ranges and pitch adjustments.

2. Split Taper Bushings:

Specifications include dimensions, bore range, cap screws, and average weight for various bushing types.
Materials used include steel, cast iron, sintered steel, malleable iron, and ductile iron.
All bushings have a taper of 3/4" per foot on diameter.

3. Air Handling Solutions:

Includes mounted ball bearings, rubber mounted bearings, and stamped steel bearings.
Products are designed for light to industrial duty applications with features like anti-rotation rivets and misalignment adjustments.
Air Handling "AH" bearings undergo noise testing and have a controlled housing fit for self-alignment.

4. Mounting Installation:

Instructions for inspecting shafts and bores, checking support surfaces, and installing units.
Guidelines for fastening units and tightening locking mechanisms, including setscrew and eccentric locking inserts.
Emphasizes the importance of proper alignment and torque specifications to ensure optimal performance.

5. Locking Solutions:

BOA concentric locking collar design for reduced vibration and noise.
Setscrew and eccentric locking mechanisms are detailed with torque specifications.

Installation Procedures:

1. Rotate the shaft by hand until eccentrics engage. Insert a drift pin into the collar hole and lock it with a hammer. Torque the setscrew to the recommended values in Table 3.

2. Ensure the BOA collar is square against the inner ring shoulder. Torque the BOA collar cap screw to the recommended torque in Table 4. Check the shaft for freedom of rotation.

Torque Specifications:

Tables 2 and 3 provide recommended torque values for setscrews and eccentric locking screws based on screw size and hex size.

Bearing Basics and FAQs:

- Static misalignment refers to a constant angle misalignment, while dynamic misalignment involves continuous changes.

- Grease is preferred over oil for bearings due to reduced maintenance and cost. Compatibility of grease types is crucial to avoid issues.

Lubrication Guidelines:

- Browning bearings come pre-lubricated with lithium complex grease. Relubrication should be done with compatible grease.

- Table 1 provides grease charge recommendations based on shaft size and series.

- Table 2 offers relubrication frequency based on environment and temperature.

Product Interchange Tables:

Tables 8, 9, and 10 provide interchange information for set screw ball bearings, BOA ball bearings, and rubber mounts with various manufacturers.

Application Considerations:

Proper selection and application of power transmission products are the customer's responsibility. Operating conditions can significantly affect product performance.

Catalog excerpts

Browning HVAC Belt Drives & Bearings Reference Pocket Guide Catalog-1

BELT DRIVES & BEARINGS REFERENCE GUIDE

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Browning HVAC Belt Drives & Bearings Reference Pocket Guide Catalog-2

V-BELTS Unique design enhances performance and provides increased HP capacity in shorter center drives. FHP

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Browning HVAC Belt Drives & Bearings Reference Pocket Guide Catalog-3

V-Belt Drives and Bearings Electronic Tools for the HVAC Industry • eCatalog • Smart Interchange • EDGE selection program

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Browning HVAC Belt Drives & Bearings Reference Pocket Guide Catalog-4

ENERGY RESPONSIBILITY IN FOUR EASY STEPS Upgrade from wrapped to notched belts and improve efficiency Worn sheaves allow belt slip. Inspect sheaves for wear. Wear greater than 1/32" can decrease efficiency 5% or more Properly tension belts Install Tenso-Set™ self-adjusting motor base

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Browning HVAC Belt Drives & Bearings Reference Pocket Guide Catalog-5

UPGRADE FROM WRAPPED TO NOTCHED BELTS AND IMPROVE EFFICIENCY 150 HP $2,125.78 125 HP $1,777.93 100 HP $1,422.00 75 HP $1,081.17 60 HP $860.16 50 HP $717.71 40 HP $576.11 30 HP $430.93 25 HP $362.25 “A single 100HP belt 20 HP $294.27 driven application that 10 HP $148.79 drops from 98% to 7.5 HP $111.92 95% in efficiency costs 5 HP $77.25 $1422.00 annually 3 HP $45.75 in added electricity.” 2 HP $32.44 (Based on $0.12/kWh, 18hrs/7 1.5 HP $23.57 day wk usage at 75% load) $16.82 1 HP 0.75 HP $13.06 0.5 HP $9.46 www.Regal PTS.com Try Out Our Free ® Toolbox Technician App • Energy Efficiency Calculator...

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Browning HVAC Belt Drives & Bearings Reference Pocket Guide Catalog-6

HVAC MONITORING SERVICES The movement of air is often the largest consumer of electricity in a commercial building. Browning® can help you recommission your equipment for maximum efficiency and payback, using products and monitoring services to recover lost efficiency. We measure these variables to calculate efficiency upgrade opportunities and projected payback: • Real energy usage • Humidity • Bearing temperature • Differential pressure • Belt temperature • Inside/outside air • Shaft speeds temperature

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Browning HVAC Belt Drives & Bearings Reference Pocket Guide Catalog-7

FIELD DIAGNOSTIC EQUIPMENT •• Temperature Sensors •• Rotational Speed Sensors •• Power Meter •• Differential Pressure Sensors •• Independent Network These sensors deliver realtime data directly to your smartphone via EVA, the "Energy Evaluation App". View our HVAC Services and Monitoring video at YouTube channel ThePowerTransmission or s

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Browning HVAC Belt Drives & Bearings Reference Pocket Guide Catalog-8

IT'S 150°F ON YOUR ROOFTOP TODAY. ARE YOU USING BROWNING® EPDM V-BELTS IN YOUR HIGH-PERFORMANCE AIR HANDLER? For decades, customers have asked for greater temperature range due to high ambient and operating temperatures in many applications. Industry standard v-belts utilize polychloroprene synthetic rubber compounds which limit operating temperatures from -30°F to +140°F Our EPDM (Ethylene Propylene Diene Monomer) Browning v-belts* expand that temperature range considerably. Operating temperatures for EPDM v-belts are -60°F to +250°F. This expanded range helps ensure long-life and reliable performance...

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Browning HVAC Belt Drives & Bearings Reference Pocket Guide Catalog-9

WHAT IS EPDM? EPDM or Ethylene Propylene Diene Monomer, is a synthetic rubber compound. EPDM is strong, flexible, and resists decay. It is ozone, oxidation, humidity, and heat resistant. Operational temperature for EPDM v-belts are -60°F to 250°F . ADVANTAGES • Greater operating temperature range • Increased efficiency up to 3% with 3VX, 5VX, 8VX, AX, BX, CX • Longer belt life • Smoother running due to higher tolerance for misalignment • TUBULAR FABRIC Unique tubular woven knit fabric, designed for maximum flexibility and performance. • OIL/HEAT RESISTANCE & STATIC CONDUCTIVITY Meets RMA standards...

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Browning HVAC Belt Drives & Bearings Reference Pocket Guide Catalog-10

The Browning®Tenso-set® Series 600 horizontal sliding motor base with optional quick release (QR) is an industry first for V-belt drives, enhancing technician convenience and belt drive efficiency by automatically maintaining belt tension for extended periods and allowing quick belt changes in just minutes. BENEFITS • Significantly reduces time required to change v-belts • Promotes greater efficiency by constantly maintaining v-belt tension • Tube rail and one-piece carriage design promotes and maintains superior drive alignment • Improved safety. No need to cut off belts or roll them onto sheaves...

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Browning HVAC Belt Drives & Bearings Reference Pocket Guide Catalog-11

NEMA Base - Quick Release Self-Adjusting

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Browning HVAC Belt Drives & Bearings Reference Pocket Guide Catalog-12

BELTS & SHEAVES TECHNOLOGY LEADERSHIP TO MEET DRIVE REQUIREMENTS WITH SHORTER CENTER DISTANCE AND HIGHER SPEEDS VARIABLE SPEED SHEAVES Engineered Features • External rib design provides cooling for longer belt life • Increases wall thickness by 30% • Increased hub diameter by 20% • Tighter tolerances by 25% • Balanced as components • Twice balanced after assembly • Larger MVP® sheaves dynamically balanced in two planes • Tightened micro-finish on groove walls for increased belt life • Now accommodates 5VX belts BROWNING® BRAND V-BELTS Engineered Features • Special blend of fiberglass and polyester...

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Browning HVAC Belt Drives & Bearings Reference Pocket Guide Catalog-14

V-BELT DRIVE ADVANTAGES V-belt drives provide many maintenance advantages that help in your daily struggle to reduce equipment repairs and to hold forced downtime to the lowest possible level. 1. They are rugged–they will give years of trouble-free performance when given just reasonable attention...even under adverse conditions. They are clean–require no lubrication. They are efficient–performing with an average of 94-98% efficiency. They are smooth starting and running. They cover extremely wide horsepower ranges. They permit a wide range of driven speeds, using standard electric motors. They...

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Browning HVAC Belt Drives & Bearings Reference Pocket Guide Catalog-15

V-BELT CONSTRUCTION Unique design enhances performance provides increased HP capacity in shorter center drives. GripBelt® Gripnotch® Belt Before we talk about “Avoiding Problems” and “Solving Problems” let’s take a brief look at how V-belts are constructed. There are basically two types of construction. One has a fabric wrapper (or jacket) surrounding it; the other – usually rated higher in horsepower – is made in a raw edged, cogged construction. GripBelt® Gripnotch® V-Belts 1. Single Fabric Design • More flexible - use with subminimal pitch diameters. 1. Ground Form • Reduces vibration, increases...

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Browning HVAC Belt Drives & Bearings Reference Pocket Guide Catalog

Browning HVAC Belt Drives & Bearings Reference Pocket Guide Catalog

Catalog excerpts

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