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Rexnord REX TableTop Series Engineering Manual

Conveyor chains
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Summary of Contents for Rexnord REX TableTop Series

  • Page 1 ® ® ® Engineering Manual...
  • Page 2 TableTop ® ® Engineering Manual...

  • Page 3: Maintenance

    However, products which must be delivered to a location per unit of time. based on many years of application experience, Rexnord is well The infeed and outfeed of each process machine will dictate qualified to point out general guidelines and alternatives in product flow width at the machines.
  • Page 4 Straight running chains were the original TableTop ® chains. There are many variations on this design, so Rexnord They required auxiliary means of transferring around corners Engineers are available to assist and make recommendations ® for any TableTop application. such as the dead plate and turntable shown below. The illustration on this page shows the basics of a simple straight running conveyor.
  • Page 5 ® TableTop . Consult Rexnord for additional information: attendant machinery. Rex® sideflexing conveyor chains solve speeds, inclines, guide rails, etc.; to suit your particular needs. those conveyor problems where high speed transfers of...
  • Page 6 RETURN WAYS STRAIGHT RUNS (For straight running & sideflexing (Bevel & Tab) chains) STRAIGHT RUNS ROLLER SLIDING RETURN WAY (For straight running & sideflexing (Bevel & Tab) chains) RETURN WAY 'SE RPE NTI N E STYLE" ROLLER SLIDING RETURN WAY RETURN WAY 'SE RPE NTI N E STYLE"...
  • Page 7 CARRYING WAYS STRAIGHT RUNNING 1" MIN. (Bevel Style) SIDEFLEXING CORNER STRAIGHT SECTION CORNER WEAR STRIPS WEAR STRIPS CURVE STRAIGHT 1/8" MINIMUM INSIDE CLEARANCE TURN 1" MIN. 1" MIN. (Tab Style) SIDEFLEXING CORNER STRAIGHT SECTION CORNER WEAR STRIPS CURVE STRAIGHT INSIDE 1/4"...
  • Page 8 TRANSFERS is essential for product protection and prevention of In the operation of TableTop® chain conveyors, smooth transfer of the conveyed product from one chain to another downtime. The various methods are described below. INFEED CHAIN SIDE TRANSFERS Side transfers are the least costly and the preferred method of product transfer.
  • Page 9 If chain sag is excessive or increases due to wear, it should be adjusted, by removing links, to the proper amount of sag. Take-ups are not recommended. If space does not permit catenary sag, consult Rexnord Corp. TAIL TRAVEL...
  • Page 10 SPROCKET & For Conventional Chains: A chain rises and falls slightly due to a chordal action as it WEAR STRIP Pitch Diameter enters a drive sprocket, or leaves a tail sprocket. Therefore, POSITIONING the sprocket should be mounted so that the highest point of the sprocket is no higher than the top of the carrying way B = Dimensional Values wear strip, otherwise the chain will rise out of the carrying...
  • Page 11 Dimension "B" is the dimension from the centerline of the ·Sprocket and Wear Track Positioning LBP CHAIN sprocket to the end of the wear track. Dimension "A" is the dimension from the centerline of the SPROCKET sprocket to the top of the wear track. &...
  • Page 12 Each intermediate drive operates in such a way that from the sprocket tooth, particularly under high peak loads. the same strand of chain continues on past the drive to the next Contact Rexnord Corp. for additional comments. drive. OFFSET WRAP DRIVE...
  • Page 13 ® MatTop ® Engineering Manual...

  • Page 14: Selection Procedure

    They are, therefore, suited for consult the chemical resistance chart (Page 4, MatTop®) applications where abrasive particles are present either or Rexnord if unsure about material - chemical from the environment or from the products carried. compatibility. Consider pin material resistance, too.
  • Page 15 SELECTION STEEL ULTRA HIGH MOLECULAR WEIGHT PROCEDURE POLYETHYLENE UHMWP cont. Plain carbon, cold rolled steel is recommended. Surface finish should be 32-63 RMS. Use heat treatable grades UHMWP polyethylene (molecular weight of at least 1.0 where available and hardened to 25-30 Rc. Lubricants million) is recommended for both dry and wet applications.
  • Page 16 General conveying applications may use most sprocket high temperatures. Consult Rexnord more sizes. Product transfer, transfer distance, or retrofit applications will dictate the sprocket size in most cases. information. Round bore sprockets are most commonly used. Round...
  • Page 17 - or for chemicals environments. Chemical included contact Rexnord With LF/Acetal thermoplastics, do not use cleaning Corrosion recommendations. or lubricating agents with a pH below 4 or above 10, CORROSION RESISTANCE GUIDE- CHAIN AND WEAR STRIP MATERIALS (DATA BASED UPON 68°f)
  • Page 18 TABLE 1 FRICTION FACTORS BETWEEN CHAIN AND WEAR TRACKS (Fw). SELECTION PROCEDURE Friction Factors Between Chain And Weatherstrips (Fw) cont. Wear strip Material Carbon And Lubrication UHMWP and Chain Material Stainless ® Condition Nylatron Steel Chain Tension Calculations 0.25 0.20 0.20 0.18 Water...
  • Page 19 TYPICAL CONVEYOR CONSTRUCTION SELECTION PROCEDURE cont. Conveyor Design and Construction VIEW GUIDE CLEARANCE CHAIN WIDTH + "A" Figure 9 - Typical Conveyor Construction Calculation of guide clearance "GC" for Calculation of "GC" at Elevated Temperatures ® MatTop Conveyors Assume a 12ft. wide, 45 ft. lone pasteurizer For conveyors operating at room temperature operating at an average temperature of 190°F.
  • Page 20 Not recom- resist deflection. Roller beds are not mended for wet applications since suitable for all chains or applica- tions. Contact Rexnord for additional a "suction" can be created between information. the chain and bed, especially if used as a return support.
  • Page 21 SELECTION Return Way Supports chain without attachments PROCEDURE cont. Conveyor Design and Construction Figure 14 Full-Width Rollers, Thermoplastic, Figure 15 Staggered Rollers, Thermoplastic Rubber or Metal. Rubber. NOTE: The supports shown in the carry way section may also be used for return way supports.
  • Page 22 When a take-up or tensioning device is required to keep a chain under constant tension Rexnord The catenary should be directly after the drive or as recommends that a spring loaded or similar close as possible.
  • Page 23 Conveyor Design and SELECTION PROCEDURE Construction cont. CHAIN BACKFLEX RADII AND CATENARIES (mm) Chain No. Min. Radius Conveyor Design and (25) 2100 Construction (38) 4705/5705 1 - 1/2 cont. 4706/5706 1 - 1/2 (38) 2" - 5" 4707 (51) 5935/5936/6938 (25) 5966 (38)
  • Page 24 HEAD AND TAIL END CONSTRUCTION Transfer plate positioning - head and tail HEAD AND TAIL END CONSTRUCTION SELECTION Dimension "A" is the dimension from the PROCEDURE centerline of the sprocket to the top of the cont. Transfer plate positioning - head and tail wear track.
  • Page 25 COMB TRANSFER PLATE MOUNTING SELECTION PROCEDURE cont. Conveyor Design and Construction cont. Figure 26 Comb Transfer Plate Mounting Dimensions A = C/L OF SHAFT TO TOP OF WEAR STRIP B = C/L OF SHAFT TO CENTER OF MOUNTING SLOT C = C/L OF SHAFT TO BEGINNING OF WEAR STRIP D = C/L OF SHAFT TO TOP OF TRANSFER PLATE T = THICKNESS OF TRANSFER PLATE Comb transfer plate...
  • Page 26 Low Temperature Application SELECTION Chain Contraction Expected PROCEDURE cont. Conveyor Design and Construction cont. Figure 27 Comb Transfer Plate Mounting (Low Temperature) 1. Secure the 2 center most transfer plates 2. Position fasteners in the remaining as shown. transfer plates to the corresponding right side or left side of the slots to allow for contraction at low temperatures.
  • Page 27 SELECTION BI-DIRECTIONAL CONVEYORS PROCEDURE The following examples show two methods cont. of driving a bi-directional conveyor with one drive. Conveyor Design and Construction cont. SPAN DRIVE SUPPORT IDLER ROLLER ROLLERS IDLER ROLLER CATENARY Figure 29 End Drive Conveyor Sag Inches (mm) Span Inches 3.0 (75)
  • Page 28 BI-DIRECTIONAL CONVEYORS, CONT. SELECTION PROCEDURE Bottom Drive Conveyor cont. (For heavy-duty service) Bottom Drive Conveyor END TERMINAL END TERMINAL IDLER ROLLER BOTTOM DRIVE Figure 30 Bottom Drive Conveyor SUPPORT ROLLERS BOTTOM DRIVE 2' - 3' (0.51M) spacing, depending on speed and other All sprockets must be keyed in-line.
  • Page 29 C/L 820 DOUBLE C/L 820 DOUBLE SPROCKET SPROCKET 12" WIDTH 12' WIDTH Figure 32 N4700 and N5700 Sprockets Sprockets C/L SPROCKET C/L SPROCKET 4700 4700 12" WIDTH Figure 33 For molded-to-width sizes or chains not shown, contact Rexnord. ® Engineering Manual MT-16...
  • Page 30 5900 Chains SELECTION PROCEDURE cont. 5935 and 5936 Chains Sprocket Requirements and Location 1-1/2 1-1/2 1-1/2 1-1/2 1-1/2 1-1/2 1-1/2 cont. C/L SPROCKET POCKET 12" WIDTH Figure 34 5966 and 5995 Chains 1-1/2 1-1/2 SPROCKET POCKET SPROCKET C/L SPROCKET C/L SPROCKET POCKET POCKET 12"...
  • Page 31 SELECTION ROUND BORE SPROCKETS PROCEDURE cont. Sprocket Installation Figure 37 Use round bore sprockets on conveyors on the shaft, with identification marks all operating at room temperature. When facing the same direction, as shown above. installing the sprockets, make sure that all After positioning all sprockets in line with sprocket faces are positioned the same way sprocket tooth pockets in the chain, secure...
  • Page 32 TOLERANCES on all above actual widths +/-1/32" (0.8 mm). For chain widths less thank 12", use nominal width +/-1/32" (0.8 mm). 5705 and 5706 chains are the same as 4705 and 4706 respectively. For molded-to-width sizes or chains not shown, contact Rexnord. MT-19 ®...
  • Page 33 Rexnord provides the soldering iron tips at 3. Using a soldering iron to form a pin head a nominal cost. A 40 watt to 80 watt so that the head is recessed in the end of soldering iron is recommended.
  • Page 34 Rexnord has pin extracting tools available A chain assembly tool is also available for disassembling 5900 series chains. Also, from Rexnord. This device will help pull chain together during final assembly when standard sheet metal or wood screws may the last pin in inserted. The assembly tool be used.
  • Page 35 ® Multiflex Engineering Manual...
  • Page 36 STRAIGHT RUN MULTIFLEX CHAIN The figure at right shows a typical straight section of conveyor. ENGINEERING Note that the conveyor frame is designed to support the chain on 9/ 32 " MIN. the bottom of the link. The wear strip spacing is varied to (58 mm) distribute the wear evenly across the bottom of the link.
  • Page 37 MULTI-INCLINE CONVEYORS MULTIFLEX CHAIN ® As illustrated earlier, the Rex Multiflex chains are ideally suited 2. That any change in the angle of chain travel should occur ENGINEERING for use on multi-incline conveyors. To assure proper functioning through downflexing of the chain - not backflexing. of these conveyors it is important: Maximum incline angle for Multiflex chains should not exceed 1 1.
  • Page 38 PRODUCT TRANSFERS MULTIFLEX CHAIN Chain downstream should be at the same height of slightly lower ENGINEERING 1 / 32 " ) than chain upstream to prevent product tippage. By using simple switching devices at different transfers, Multiflex Chain can be further utilized to continuously distribute products to different points in the plant.
  • Page 39 CHAIN RETURNS MULTIFLEX CHAIN ® A great variety of chain returns are possible with Rex Multiflex The best type of return for a specific case depends on the ENGINEERING chains. This variety of returns offers considerable conveyor conveyor configuration and other application considerations (product flow, available space, etc.).
  • Page 40 CHAIN RETURNS (Continued) MULTIFLEX CHAIN ENGINEERING ELEVATING CONVEYORS DRIVE ® Multiflex chains have the ability to elevate or DRIVE SPROCKET* lower products in a very compact area. This figure SPROCKET* TYPICAL For mounting shows a typical elevating system and how the chain is details, See CONVEYOR being returned on such a unit.
  • Page 41 CHAIN RETURNS (Continued) MULTIFLEX CHAIN For supported returns on conventional or elevating conveyors, ENGINEERING sliding returns are recommended, not roller returns. The straight corner section design for the sliding return can be the same as for the carry section. The chain is simply run in the conveyor upside down through the return section.
  • Page 42 CHAIN RETURNS DEFINITION OF CATENARY LENGTH MULTIFLEX (Continued) CHAIN CATENARY SAG ENGINEERING (For elevating and lowering only. For conventional multiflex Elevating System Lowering System conveyors see Page 7, TableTop ® important considerations in return design are: TAIL HEAD TYPICAL SHAFT SHAFT 1.

  • Page 43: Location And Positioning

    MULTIFLEX SPROCKET AND WEAR STRIP POSITIONING CHAIN For Multiflex Chains Only ENGINEERING Pitch Diameter TOP OF WEAR STRIP SPROCKET & WEAR STRIP IDLER +1/32 POSITIONING Chain (50mm) 1701, 1702 1.968 " 15/32" (40mm) 1/4" 1755 1.575 " (76mm) 45/64" 2500 3.0"...
  • Page 44 MULTIFLEX Friction Factors Between Chain and Wearstrips (Fw) CHAIN ENGINEERING Wear strip M aterial Carbon and UHMWP and Lubrication Stainless Steel Nylatron Chain Material Condition 0.30 0.25 Water STRAIGHT 0.23 0.21 Acetal Soap & Water RUNNING 0.15 0.15 CHAINS 0.10 0.10 0.25 0.20...
  • Page 45 SECTION #3 CALCULATION OF CHAIN TENSION FOR IDLER MULTIFLEX WHEEL CORNER CHAINS DISCS 30" SECTION #1 SECTION #2 (CASE B) RETURN EXAMPLE 1 : SUPPORT SECTION #4 IDLER 20" CONVENTIONAL CONVEYOR PARAMETERS: Chain Weight = 1 0 Lb /Ft. (1701 TAB) DRIVE Product Weight = 5 Lb /Ft.
  • Page 46 MULTIFLEX CHAIN SECTION #8 ENGINEERING DRIVE DRIVE SPROCKET SPROCKET (CASE C) EXAMPLE 2: SECTION #2 ELEVATOR PARAMETERS: Chain Weight W = 0.85 Lb./Ft/ (1700) SECTION #5 Product Weight M = 7 Lb./Ft. SECTION #6 fw = 0.25, fm - 0.18 Sections 3 through 8 SECTION #4 are inclined at...

  • Page 47: Environmental Conditions

    For continuous operation on 150° F, water, allowable load on one-piece link Acetal and LF Acetal chains should be reduced. Consult Rexnord, Inc. *Properties other than ability to resist temperature should be considered. i.e. stress corrosion cracking, corrosion, etc.
  • Page 48 - or for chemicals environments. included contact Rexnord With thermoplastics, do not use cleaning or recommendations. lubricating agents with a pH below 4 or above 10. CORROSION RESISTANCE GUIDE- CHAIN AND WEAR STRIP MATERIALS (DATA BASED UPON 68°f)
  • Page 49 Drink 24 oz. 3 1/8 Dia. Cafeteria Products 28 oz. 3 3/8 Dia. 32 oz. 3 5/8 Dia. (Weights and sizes will vary; consult Rexnord Inc. for assistance in selection.) Soft Drink Metal 2 5/8 Dia. 12 oz. Food 16 oz.
  • Page 50 The worst condition is high speed, dry operation. ACETAL Rexnord has accumulated many years of application experience as well as laboratory test data on chain-wear strip Not recommended for use with Acetal chains. It is best not to compatibility.
  • Page 51 WEAR STRIP ® Nylatron UHMWP Steel sideflexing chains C.F. Stainless Steel MATERIAL ® Nylatron *C.F. Stainless Steel dry** - Steel consult Rexnord * Can be noisy in completely dry applications. ** Selective lubrication is required in corners. ® Engineering Manual MF-16...

  • Page 52: Installation And Maintenance

    Proper care and maintenance of TableTop ® chains will of tight clearance. Make sure TAB chains have plenty INSTALLATION provide smooth, efficient operation and, in turn, of clearance, especially on the inside of curves. extended chains and conveyor life. It is, therefore, 5.
  • Page 53 CLEANING INSTALLATION In many applications, rapid build-up of grease, dirt, grit, MAINTENANCE sand, spilled syrup and beverage can occur. These result in: 1. Soiling and damage to the conveyed product. 2. Increased work demands for the chain and motor. CLEANING 3.

This manual is also suitable for:

Rex mattop seriesLbp883 tabRex multiflex series4705 lf4705 ht4705 lt ... Show all