Power Transmission Belt Drive System Installation ...

1 Transmission belt Drive SystemInstallation, Maintenance and troubleshooting GuideTable of Contents Installation GuideTable of ContentsInstallation V-Belts V-Belts 3 Banded Belts Torque Team V-Belts 16 Poly-V Belts 25 Specialty Belts Variable Speed Belts 33 Synchronous Belts Synchronous Belts 35 Maintenance What to look for 44 What to listen for 45 troubleshooting V-Belts Performance Analysis 46V-Belts troubleshooting Chart 49 Synchronous Belts troubleshooting Chart 51 Synchronous Belts Tensioning Tables 53 Wedge TLP V-Belts Tensioning Tables 54V-Belts Tensioning Tables 55 Tools 58 Poly-V and Torque Team are registered trademarks of Continental GrooveAngle Industry Standard Groove Dimensions for V- belt SheavesFile Break All Sharp CornersbgdBRBhgSeSgStandard Groove DimensionsOutsideDiameterDatumDiameteraF ace Width of Standard and Deep Groove SheavesFace Width = Sg (Ng 1) + 2 SeWhere: Ng = Number of GroovesV- Belts Installation GuideV-BeltsInstallation GuideCheck sheaves for cleanliness, damage and wear each time belt maintenance is performed and whenever belts are changed.

2 The inspection procedure is described on page 7 of this guide . Use the Groove Dimensions Tables 1 and 2 (on pages 4-6) and tolerance data below as a reference to determine if excessive sheave wear has occurred. They can also aid in replacement belt cross section selection, if tables are based on industry standard dimensions for V- belt sheaves. Always check the original sheave specifications if possible. Variances from industry standards can occur to provide for special design or performance 1 Groove DimensionsStandard Groove Dimensions (in.) Cross Section Outside Diameter RangeGroove Angle 0. 33bgbghg , AXUp through (7/16) $ , BXUp through (9/16) + , AX & B, BXCombinationA , AXUp through (9/16) + , BXUp through (9/16) + , CXUp through to and including (25/32) + through to and including (1 ) + through (1* ;) + Other Sheave Tolerance sOutside DiameterUp through diameter: each additional inch of outside diameter Runout*Up through diameter: each additional inch of outside diameter Runout*Up through diameter: each additional inch of outside diameter in.

3 *Total Indicator Reading3 Table 1 Groove Dimensions Drive Design Factors (in.)Cross SectionDatum Diameter RangeMinimum Recommended Datum Diameter2aA , AXUp through : : , BXUp through : : , AX & B, BXCombinationA , AXUp through (1)Over : (1) AX: (2)B, BXUp through (1)Over : (1) BX: (2)C, CXUp through to and including : : through to and including : through : 1 Groove DimensionsDeep Groove Dimensions (in.)Cross SectionOutside Diameter RangeGroove Angle 0. 33bgbghg , BXUp through + , CXUp through to and including + through to and including + through + (1) Diameters shown for combination grooves are outside diameters. A specific datum diameter does not exist for either A or B belts in combination grooves.(2) The A values shown for the A/B combination sheaves are the geometrically- derived values. These values may be different than those shown in manufacturer s of the deviations from Sg for all grooves in any one sheave shall not exceed variation in datum diameter between the grooves in any one sheave must be within the following limits: Up through in.

4 Outside diameter and up through 6 grooves: in. (add in. for each additional groove). in. and over on outside diameter and up through 10 grooves: in. (add in. for each additional groove).This variation can be obtained easily by measuring the distance across two measuring balls or rods placed diametrically opposite each other in a groove. Comparing this diameter over balls or rods measurement between grooves will give the variation in datum groove sheaves are intended for drives with belt offset such as quarter-turn or vertical shaft drives. (See RMA Power Transmission belt Technical Information Bulletin IP-3-10, V- belt Drives with Twist).Joine d belts will not ope rate in de e p groove sheave s .Also, A and AX joined belts will not operate in A/AX and B/BX combination Sheave Tolerance sOutside DiameterUp through diameter: each additional inch of outside diameter Runout*Up through diameter: each additional inch of outside diameter Runout*Up through diameter: each additional inch of outside diameter in.

5 *Total Indicator Reading4 V- Belts Installation GuidebgbeaIndustry Standard Groove Dimensions for HY-T Wedge belt DrivesStandard Groove DimensionsDeep Groove DimensionshgRBdBSeSgGrooveAngle File Break All Sharp CornersaSeSgRBhgdBbe&bgE"ective andOutside DiameterPitchDiameterGrooveAngle File Break All Sharp CornersheOutside DiameterPitchDiameterE"ective DiameterFace Width of Standard and Deep Groove SheavesFace Width = Sg (Ng 1) + 2 SeWhere: Ng = Number of GroovesV-BeltsInstallation GuideTable 2 Groove Dimensions Standard Groove Dimensions (in.)Design FactorsCross SectionStandard Groove Outside DiameterGroove Angle 0. 25 Degreesbg Recommended Outside Diameter2a3V,3 VXUp through to and including to and including + : : ,5 VXUp through to and including + : : through to and including + : Belts Installation GuideSummation of the deviations from Sg for all grooves in any one sheave shall not exceed in.

6 The variations in pitch diameter between the grooves in any one sheave must be within the following limits:Up through in. outside diameter and up through 6 grooves in. (add in. for each additional groove). in. and over on outside diameter and up through 10 grooves in. (add in. for each additional groove).This variation can easily be obtained by measuring the distance across two measuring balls or rods placed in the grooves diametrically opposite each other. Comparing this diameter over balls or rods measurement between grooves will give the variation in pitch groove sheaves are intended for drives with belt offset such as quarter-turn or vertical shaft drives (see Power Transmission belt Technical Information Bulletin IP-3-10). They may also be necessary where oscillations in the center distance may occur. Joined belts will not operate in deep groove Sheave Tolerance sOutside DiameterUp through diameter: each additional inch of outside diameter, Runout*Up through diameter: each additional inch of outside diameter, Runout*Up through diameter: each additional inch of outside diameter, in.

7 *Total Indicator Reading5 Table 2 Groove DimensionsStandard Groove Dimensions (in.)Design FactorsCross SectionStandard Groove Outside DiameterGroove Angle 0. 25 Degreesbg hg Recommended Outside Diameter2a2he3V,3 VXUp through to and including to and including 1222 Over + : : ,5 VXUp through to and including + : : through to and including + : of the deviations from Sg for all grooves in any one sheave shall not exceed in. The variations in pitch diameter between the grooves in any one sheave must be within the following limits:Up through in. outside diameter and up through 6 grooves in. (add in. for each additional groove). in. and over on outside diameter and up through 10 grooves in. (add in. for each additional groove).This variation can easily be obtained by measuring the distance across two measuring balls or rods placed in the grooves diametrically opposite each other.

8 Comparing this diameter over balls or rods measurement between grooves will give the variation in pitch groove sheaves are intended for drives with belt offset such as quarter-turn or vertical shaft drives (see Power Transmission belt Technical Information Bulletin IP-3-10). They may also be necessary where oscillations in the center distance may occur. Joined belts will not operate in deep groove Sheave Tolerance sOutside DiameterUp through diameter: each additional inch of outside diameter, Runout*Up through diameter: each additional inch of outside diameter, Runout*Up through diameter: each additional inch of outside diameter, in. *Total Indicator Reading6 V- Belts Installation GuideLike thisNot thisWARNINGD isconnect Power supply to the machine before removing or installing sheaves or not reinstall damaged or worn sheaves on the belt should be flush with or slightly above the outer diameter of the sheave.

9 Remember that if the belt top is below the sheave s outer diameter, the groove is worn. Perform further inspection if possible. Use the Groove Dimension Tables 1 and 2 (on pages 3-6) to determine if excessive wear has occurred or to select replacement belts and sheave cross Install hardwareAlways remember to select the correct sheave. Then, after you make the correct selection, be sure to install the sheaves performing any Installation , follow correct lockout procedures to prevent any accidents. IMPORTANT: Disconnect Power supply to machine before doing ANY work. QD BushingIf the sheaves are made with a QD hub, follow these Installation and removal instructions:3. How to install a sheave with a QD hub Insert the bushing in the hub and line up bolt holes. Insert the pull-up bolts and turn until finger the loosely assembled unit so the bushing flange points toward the shaft bearings. Reverse mounting the QD bushing can be advantageous for some applications.

10 Slip the unit onto the shaft and align the hub in the desired position. V- Belts Installation GuideV-BeltsInstallation Guide1. Inspect sheavesThe following sections outline Installation procedures that will ensure maximum life and performance for your V-belts. Check sheaves for cleanliness, damage and wear whether you are replacing an existing belt , performing routine maintenance or installing a new a stiff brush to remove rust and dirt. Use a soft cloth to wipe off oil and grease. Select the proper sheave groove gauge and template for the sheave diameter. Insert the gauge in the groove and look for voids that indicate dishing or other uneven and abnormal wear. An alternative method for checking for sheave groove wear is to place a new belt in the sheave groove. Note that the top to to POOver Sheave Groove Gauge7 5. How to install split taper bushing sheavesPut the bushing loosely in the sheave and start the the assembly on the shaft.