Steel Conveyor Rollers - Bryant Products Incbryantpro.com/major/wp-content/uploads/2015/10/teletrack-roller... · Steel Conveyor Rollers ... roller conveyor section. Chain driven

Steel Conveyor Rollers

■ Bearings■ Components■ Accessories

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CONVEYOR & INDUSTRIAL COMPONENTSCONVEYOR & INDUSTRIAL COMPONENTS

TAKE -UPS CONVEYOR & INDUSTRIAL COMPONENTS



COMPONENT & INDUSTRIAL INNOCOMPONENT & INDUSTRIAL INNOVATIONTION

PrProducts, Inc.oducts, Inc.

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Bryant Products manufacturers a complete line of steel conveyor rollers for every Unit Handling conveying application.Generally, all rollers fall into one of two categories:Rollers for Gravity Conveyors - typically a light duty roller with low precision light duty bearings. Most of these rollers turn on ahex shaft that is spring loaded and snaps into the conveyor bed. Gravity conveyors rely on the inertia of the conveyed product tomove - the rollers are not driven. Gravity rollers may be used in conjunction with driven rollers as idlers in a powered roller conveyor section.

Driven Rollers - fall into two classifications - those driven by chain or those driven by a belt. Either provide an effective poweredroller conveyor section. Chain driven rollers have a sprocket or sprockets fixed to one end. Belt driven rollers have one or twodrive grooves formed into one end of the roller and are driven by a belt that is circular in cross section. The belt may be a longserpentine unit driving a series of rollers or, in the case of a lineshaft system, one belt for each roller configuration where a singleshort belt engages one roller and a sheave on the lineshaft. Belt driven rollers are frequently equipped with higher capacity,higher precision bearings since the systems they are used in run heavier loads at higher speeds.

Bryant Products is pleased to offer a wide variety of designs and components for either driven or gravity roller systems. Ourdesign team will work with the application engineer to offer a perfect match of tubing material, bearings, axles and specialty components for each specific requirement. We carry an extensive assortment of materials, bearings and components whichenables us to offer our clients the maximum performance in a minimum of lead time.

There are four major component groups in a typical roller assembly:

Tubing - the outer body or shell of the roller

Bearings - the anti-friction member on which the roller shell rotates

Shaft - passes through the bore of the bearing and holds the roller in the conveyor frame. The bearings

rotate about the shaft

Specialty Components - items such as sprockets, belt grooves, springs, washers, adapters, seals

Roller Tube orShell

Hex Axle Flat &Backing Washer

ConveyorFrame

CompressionSpring

BearingDust Shield/Hex Adapter

Precision Bearing inPlastic End Cap

Press Fit Construction

RollerShaft

Typical Conveyor Roller Assembly

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Tubing

Tubing is available in a wide variety of sizes and gages ranging from 13/16" diameter to 6" in diameter. Several standardsizes; 1.5", 1.9", 2.5" and 3", can be manufactured from a pre-plated material, now commonly used by most large scaleunit handling conveyor manufacturers. This material is available in 16, 14 and 13 gage with 16 gage being the mostcommonly used wall thickness. A variety of post plating options are available with a Chromate Sealer over Bright Zincbeing the most common. Stainless steel is also available - 304 is the most commonly used grade.

Bearings

There is a wide variety of bearings and bushings available for conveyor roll applications. Most of the bearings producedfor rollers 3"in diameter and less have hex shaped bores to accommodate hex axles of 1/4", 7/16" and 11/16" size.Bryant stocks most commonly used bearings and has immediate access to a vast array of more application specific bearings.

Low Precision - Light Duty BearingsThese bearings are of a stamped steel construction. The outer raceways are formed inthe stamping process and integral with the outer cup of the bearing. The inner race istypically machined with a hardened ball track and an ID formed into a hex to acceptthe axle. They feature a full ball compliment. Full compliment bearings offer additionalload capacity at the sacrifice of some RPM.

Some may be fitted with a thermoplastic insert that contains the hex and provides aface shield for the bearings. While slightly more costly, these bearings offer quieteroperation, with higher speeds and load capacities. Most of the bearings in this seriesare limited to 2.5" OD and are used for lighter application rollers. It is important to notethat all of the standard bearings in this category are produced with bores to fit hexshafting only in sizes of 1/4", 7/16" and 11/16".

Bearings of one diameter may be stepped up to larger tube sizes with the use ofmachined washers, stamped steel adapters or thermoplastic end caps. We offer an all stainless bearing in this family, allcomponents - inner ring, outer race, end cap and balls are produced in stainless steel. This product, in addition to beingwell suited to the most demanding food processing applications, offers higher capacities than its carbon steel counterparts.

Stamped SteelOuter Housing

Full BallComplement

Machined InnerRace -

Hex Bore

Low Precision - CagedThese Medium to Heavy Duty bearings offer formed outerraceways that may be integral with the OD of the bearing andmachined ID, with or without thermoplastic hex adapter. Theballs are separated by a plastic or steel ball retainer or cage.They offer higher speeds and load capacities and are avail-able in stock diameters up to 4". Larger rollers can be builtwith this series using machined steel washers.

BearingCage

Hex AdapterInner Dust Shield

Outer Dust Shield

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Integral End Cap& Outer Race

Inner Race& Hex Axle Adapter

StainlessBalls

Molded BearingCage

Plastic Ball Bearings These are light duty bearings for low loads andspeeds where the primary concern is corro-sion, rust or chemical resistance. The bearingshave molded inner and outer races, generallyhave stainless steel balls and are available ineither full compliment or caged construction.These bearings are often used with stainlesssteel tubes for food grade or field applications.For additional information on these materials,please consult the section on Thermoplasticand Specialty Conveyor Rollers.

BushingsWe offer a large variety of bushing materials if a rolling ele-ment bearing is not desired. Bushings offer the advantage ofhigher load capacity under lower speed conditions. Bushingsare available in UHMW, Sintered and Oil impregnated bronzeand wood. For additional information on these materials,please consult the section on Thermoplastic and SpecialtyConveyor Rollers. Most bushings require a hex adapter tomate the round bore of the bushing to the hexagonal crosssection of the axle. The adapter then rotates within the boreof the bushing.

Bushing HexShaft Adapter

UHMWBushing

ThermoplasticStep-Up Adapter

Balls & Cage

Thermoplastic Hex Adapter

Machined, Ground &Hardened Inner & Outer Races

Precision Ball BearingsPrecision bearings are typically ABEC 1 motor grade bearings. Thesebearings feature machined inner and outer rings that are groundand hardened. They are fully sealed, factory pre-greased and offerthe highest load and RPM capabilities of all the bearing optionsavailable. ABEC bearings are mounted to the roller tube by press fit-ting directly into the bore, press fit into a machined washer or fittedinto a thermoplastic adapter.

ShaftingThe primary purpose of any axle is to mount the roller to the conveyor frame. A well designed axle will notrotate or move within the frame and will engage the bearing in such a manner as to cause the roller torotate on the bearings and around the locked axle.

Hexagonal AxlesThe overwhelming majority of conveyor rollers 3" in diameter and under use a hex shaft for an axle. All ofthe bearings used in these sizes from the light duty models to ABEC 1 precision units come with someform of hex adapter or form for the ID of the bearing.We offer hex shafting 1/4", 7/16" and 11/16" in both low carbon and stainless steel. The hex slips into ahex adapter in the bore of most bearings and locks into a mating hex on the conveyor frame insuring fullrotation of the rolling element bearing.

Hex Shaft Upset FlatsBacking WasherCompression Spring

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Round AxlesRound shafts are available in various configurations. It is important to note that a round axle must be locked on the frame to prevent it from rotating. This lock is necessary to force the roller to rotate on the bearings. Round axles can be tapped on theends and secured and locked to the frame with a bolt. They can also be milled flat on one side and placed into a hole similarlypunched or a round hole with a small strip of steel welded in such a manner as to engage the flat on the shaft and prevent it from rotating. Round shafts are typically used on larger diameter rollers with heavier loads and are fitted into the bore of precision bearings with a light press fit or with locking collars.

Specialty Components

SpringsMany hex shaft rollers are fitted with a spring to facilitate assembly. The spring is fitted between an upset flat on theaxle and the bearing. To install, one end of the axle is placed into the frame, the axle is then pressed against thespring and, in the retracted position, aligned with the hole on the opposite side of the frame. The rod is then releasedinto position. The upset flats on the rod may be backed with washers for a more positive stop.

SealsWhile many bearings offer seals, shields or fixed face shields, many highly contaminated environ-ments require additional mechanical shielding of the bearings. Bryant makes a variety of labyrinthseals and guards for harsh environments, with an exceptional degree of particulate contamination.Please consult the factory for details and be prepared to fully describe the environment and materials to be conveyed.

Drive Grooves We produce rollers with drive grooves, either single or double row, for lineshaft and belt drivenconveyor systems. The grooves are most commonly offered with 3/16" or 1/4" radius grooves ofvarying depths and can be formed in stainless or low carbon steel rollers.Most bearing and component options are compatible with drive groovedrollers and the rollers themselves are available in stainless and low carbon steel.

SprocketsWe offer sprockets attached to any of our rollers. Sprockets can bewelded in place in a single or double row configuration or CNC machinedin our shop and added to the end of the tube as an end cap and bearing retainer. We also offer thermoplastic sprock-ets for wash down applications, where plastic chain is being used or where a reduction in noise is desirable. Again,these products are CNC machined on site to your specifications.

Adapters The OD of a particular bearing may be too small for the ID of the roller shell that it is intended for. Rather than go to theexpense of selecting a bearing with a larger OD, it is faster and more cost effective to use a step up adapter.

These adapters fall into three categories:

Machined Washers - Are produced in either stainless or low carbon steel. The washercan range in thickness from 1/8" to 1/2" and is welded into the ID of the tube. Following theweld, the washer is precision bored using the OD of the tube as the locating surface. Thisinsures a proper bearing fit and a bearing pocket that is concentric to the OD of the tube whichprovides a roller with reduced T.I.R.

Stamped Cup Adapters - Performs the same function as the machined washer and areproduced by the manufacturers of the bearings to insure a proper bearing to adapter fit. Theyare stamped from light gage steel. The bearing is press fit into the adapter and the resultingsubassembly is then staked or swaged into the ID of the roller tube.

Thermoplastic Adapters - Are most often used with precision ball bearings and areavailable for 1.9" and 2.5" diameter rollers. The most concentric adapters are insert moldedover the bearing, minimizing runout and insuring the best fit. Other designs require the bearingto be press fit into the adapter. Either subassembly is then press fit or hydraulically swaged intothe roller tube.

LabyrinthSeal

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StampedBearing Cup



Drive Grooves

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Specifying a Conveyor Roller Assembly

BF - Between FramesYou must specify the BF dimension for the rollers. This may be in inches or millimeters.

FW - Face WidthFace width is a function of the BF dimension. Measured from the outermost face of one bearing to the outermost edge of it’scounterpart, the standard face width of all rollers manufactured at Bryant Products is 1/8” less than the BF dimension.

OALOverall length is measured from tube edge to tube edge. Since we carefully control the BF dimension to insure a proper fit of theroller into the conveyor’s frame, OAL may vary within the same face width with particular bearings being used.

ShaftSpecify the materialCross section - round or hexSize - specify a diameter or hex sizeSpring loaded for push in assemblyLocking method if a round shaft is ordered

Tube MaterialPlease specify the tube diameter, gage and finish (plain, pre-plated or post plated)

BearingsSpecify the type of bearings required. Please note that not all bearings are available for every combination of tube diameter, shaftcross section and size. Consult the factory for availability.

Accessory ItemsBe prepared to specify such items as drive sprockets or grooves, secondary seals for the bearings, special frame to roller matingcomponents. For tapered conveyors, please consult the appropriate section of this catalog.

BF

FW

Bearings Tube Material

Shaft

OAL

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Thermoplastic& SpecialtyConveyor Rollers

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Conveyor Rollers From Bryant Products, Inc.Conveyor rollers are a highly customized product since the material to be conveyed, the environment in which it is being conveyed,and the speed at which the belt travels all vary greatly from application to application. Our rollers offer the designer customizedroller assemblies from a wide variety of readily available stock components. For ease of ordering and engineering selection, wehave grouped our component groups as follows:

Roller HardwareBushings

Conveyor Roll Bearings–Bushing, Solid & Bearing TypeConveyor Roll TubingConveyor Roll Drives

Roller HardwareConveyor Roll Pins – available in either stainless or low carbon steel. They fea-ture a 5/16 - 18 Internal Thread and are fixed to the conveyor frame with bolts. Theyhave 7/16" outer hex sections to allow the use of a wrench for tightening.Roll Pins are used in conjunction with blind hole bushings or end cap bearings. Thisconstruction is suggested when the interior of the roll needs to be sealed from outsidecontamination such as wash down applications or where the rollers may be partiallyimmersed.

Through Shaft – available in either stainless or low carbon steel. Shaft is 1/2" OD and has an internal 5/16 - 18 thread.Through shafts should be used for more heavily loaded applications where there is concern about the cantilevered loading on Conveyor Roll Pins. Shaft extends 1/4" beyond outside face of end cap on both sides.

Spring Loaded 7⁄16" Hex Shafts – a through shaft design that is used in conjunction with conveyor frames thathave been pre-punched for their use. These 7/16" hex shafts are available in low carbon or stainless steel and facilitate rapidinstallation on the frame without the use of tools. The hex protrudes 13/16" on either side. Hex shafts require through bore bush-ings or ball bearing end caps.

Hex adapters are used as an interface between the hex shaft and the circularbore of bushings or solid bearing material end caps and many of the ball bearingsused in our Conveyor Roll bearings. Stainless or Low Carbon Steel bushings requireeither a self lubricated bushing or ball bearing for rotational movement. A self-lubri-cated UHMW adapter is offered that requires no additional bearing components andprovides long life and excellent performance under rotational loads.

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Bearings & End Caps – Bushing TypeThere are two varieties of Bushing Type Conveyor Roller Bearing End Caps – Solid bearing material end caps aremade from a self lubricated bushing grade material and require no bushings or bearings. Molded end caps accept either self-lubricated bush-ings or ball bearings. End caps that are equipped with bushings or ball bearings have the advantage over solid bearing material end caps in thatthey can be rebuilt and are less expensive than solid bearing material end caps. Worn bushings or ball bearings can be extracted from the rollerend cap and new bushings press fit into the bore of the end cap. The advantage offered by solid bearing material end caps are greater loadcapacity, a simple one piece design and a greater lubricant supply. The use of bushings in conveyor rolls are recommended for driven applica-tions or gravity feed applications for heavier products. Bushings have the advantage of longer life, higher load capacity and greater resistance to contamination and corrosion. Ball bearings may offer lower friction and can be preferable for lighter loads where starting torque is a concern.

UHMW Bushings are self lubricated Ultra High Molecular Weight Polyethylene using a food grade greaselubricant. UHMW is the most abrasion resistant of all bearing grade thermoplastic materials. With excellent surfacelubricity and internal lubrication – they offer high performance, long life and high PV Values.

Wood Bushings are made from hard maple and are internally lubricated with a food grade fluid lubricant. This provides on demand lubrication during rotating motion in the presence of heat and friction. The lubricant film also offers some protection against corrosion and rusting to the mating metal surface. Wood is suitable for heavy loads and high speed applications – offering greater static and dynamic capacity than plastic bushings.

Molded End Caps are designed to accept our UHMW or Wood bushings and offer an economical, high PVand rebuildable bearing system for your conveyor rollers. This is the strongly preferred method of constructionwhen sliding contact bearings are desired. ABS End caps require the use of a self lubricated bushing. Moldedspecifically to precisely fit all of our standard tubing and bushingsizes, these end caps, when installed, provide atight, even, seamless fit in retaining the bushing in the roller tube. End Caps for Roller Diameters of 2.38" or lessare molded from Acetal. ABS is used in End Caps for the larger roller diameters.

Solid Bearing Material End Caps Conveyor Roll Bearings do not require the use of bushings as theyare machined as a solid piece from either our UHMW or Wood Bushing material as described above. They areformed from the same materials and exhibit the identical mechanical properties to the corresponding bushings.They are finished to the diameter of the shaft bore and are available in Blind Hole or Through Bore configurations.Generally, these bearings are used in conjunction with low carbon and stainless steel gage tubing sizes as they canbe machined to fit the pipe bore. These roll bearings, however, cannot be rebuilt. These Conveyor Roll bearings aregenerally recommended for driven applications or gravity feed applications for heavier products. These bearingsoffer longer life and accommodate higher static loads than ball bearing end caps.

Bearings & End Caps – Ball BearingBall Bearing Conveyor Roll End Caps are generally recommended for gravity feed applications of lighter materials.They offer lower starting torque than bushing equipped end caps but do not have the life or static load capacity ofbushing type end cap assemblies.

Acetal Molded Ball Bearing End Caps are an injection molded ball bearing end cap. These are the leastexpensive ball bearing design units we offer and are suitable for light duty applications where cost efficiency is ofparamount concern. They are available in stock sizes to fit a variety of bore and tubing diameters.

Plastic Race Ball Bearing End Caps are a higher precision, higher capacity alternative to the MoldedAcetal Ball Bearings. They feature 420 Stainless balls and, therefore, offer a non-corroding construction suitable forwet applications. The bearing elements are an integral part of the end cap assembly. Plastic Race Ball Bearings aredesigned to be used in conjunction with our PVC tubing and are typically used with hex shafting. Special Poly-propylene Cap and race bearings with 316 Precision Stainless balls are available for highly corrosive environments.

Precision, High Performance Ball Bearing End Caps feature a shielded or sealed, precision machined 6000 Series precisionball bearing in either a molded ABS or reinforced polypropylene end cap. Optional, stainless ball bearings are available. 6000 Series ball bearingsoffer the highest precision, longest life and greatest RPM and load capacity of our ball bearing end cap selections. These bearings are available ineither a hex or round bore and in sizes to fit a variety of tubing diameters. End caps are available for 1.9", 2.38", 2.5", 2.88" diameter rollers.

WOOD BUSHING

AND

ABS END CAP

UHMW BUSHING

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TubingWe use only the highest quality tubing for our rollers. This tubing is specifically extruded to our specifications and is ID, OD and Runoutcontrolled. In comparison to commercial grades of thermoplastic pipe, our high quality PVC and reinforced UHMW tubing can runsmoothly at higher speeds, is quieter under load, have heavier wall thicknesses and more durable surface finishes. We also offer a fullrange of steel pipe and tubing sizes where economy is a concern and where higher noise and resistance to corrosion or rust are not amajor design issue.

Steel Tubing is available in 2" or 2.50" Schedule 40 pipe in either low carbon or stainless steel. We also offer low carbon steel EMTtubing in 1.25", 1.5", 1.9" and 2" diameters, 16 gage.

PVC Tubing is a high impact thermoplastic material and is available in outside diameters ranging from 1.90" to 2.88" in a variety ofpipe sizes and wall thicknesses. PVC tubing has a service temperature range from -10 to +140 degrees Fahrenheit.

Steel Reinforced PVC Tubing offers a steel reinforcement tube within the PVC roller. This construction greatly limits rollerdeflection and increases stiffness by a factor of ten. If rust or corrosion are anticipated, we suggest that Blind hole bearings or bushingsbe used to seal the interior of the tube from moisture and contaminants.

Aluminum Reinforced UHMW Tubing provides a hard, slick surface and is the most abrasion resistant thermoplastic rollermaterial available. It is longer wearing and therefore offers longer life than PVC tubing but a premium in price. It consists of a 16 gagealuminum liner in 1/8" wall UHMW. This brings added stiffness and load capacity to the benefits of UHMW tubing described above.

Tapered PVC Rollers are machined from our standard grade of PVC and are designed for belt drive systems. Tapered rollers canbe configured in a number of ways. For driven applications, tapered rollers can be configured with either a straight 2" drive sleeve or witha UHMW sprocket. For gravity applications, simply specify a tapered profile over the length of the tube.

Roller Drive ComponentsWe offer two types of Roller Drives - grooved tubing for 3⁄16" round belt drives orSprockets for #40 Chain. The sprockets are machined from UHMW material andcan be reinforced with a steel sleeve for heavily loaded driven applications. Ourround belt drives are roll formed directly into the tubing offering a seamless, singleunit design. This eliminates additional components and potential fit and leakageproblems at a reduction in cost to multiple component configurations.

METAL REINFORCED THERMOPLASTIC TUBING

METALREINFORCING

TUBE

OUTERTHERMOPLASTIC

LAYER

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Component Construction Options

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Usage and AvailabilityThe list below represents the most common sizes and combinations of components used in the manufacture of conveyor rollers. We recognize that there are many special needs andcan readily offer additional sizes and components that provide solutions tailored to your specific application requirements. For information on products not listed below, please contact the factory or your local Bryant Field Sales Representative.

Roller TubeRoller diameter - OD 2.88 2.38 2.25 1.88Pipe Size 2.50 2.00 1.50EMT Size 2.00 1.50 1.38 1.2516 Gage 1.90

Hardwareconveyor roll pin * * * * * * * *through shaft internal thread * * * * * * * *spring loaded hex shaft - 7⁄16” * * * * * * * * *UHMW hex adapter * * * * * * * *stainless or low carbon steel hex adapter * * * * * * * *

BushingsUHMW * * * * * * * *Wood * * * * * * * *

End Caps - Bushing InsertABS * * * *

Conveyor Roll Bearings - Sliding ContactUHMW * * * * * * *Wood * * * * * * *

Conveyor Roll Bearings - Rolling Elementmolded acetal * *plastic race *precision * * * *semi - precision * *stamped metal bearing * *

Drive Unitssingle sprocket * * *dual sprocket * * *belt drive - single or dual * * * *

TubingPVC - schedule 40 * * * *PVC / steel * *UHMW / aluminum * *stainless steel * * * * * * *low carbon steel * * * * * * *

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Steel Conveyor Rollers - Bryant Products Incbryantpro.com/major/wp-content/uploads/2015/10/teletrack-roller... · Steel Conveyor Rollers ... roller conveyor section. Chain driven