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Martin Offers Two Complete Lines of Jaw Couplings —One for Greater Horsepower and One for Interchngeability.
Martin-Flex® flexible couplingssmoothly transmit power whilecompensating for shaftmisalignment to 4°, parallelmisalignment to 1/8” and endfloat to 5/16”. The two pieceflange design provides quick andeasy installation and theelastomeric element absorbsshock and torsional vibrationthrough a wide temperaturerange.
For the Most Complete Line ofChain Couplings Available.
Martin QUADRA-FLEX® • A Proven Design Which Offers Long Life, Torsional Flexibility,Ease of Installation, and Withstands Misalignment, Shock, and Vibration.
ML — Type MS— Type
S/B BS TB QD Aluminum Plastic
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COUPLINGS
QUADRA-FLEX®4-WayFlexing
Quadra-Flex® FLEXIBLE COUPLINGS
Stocked NationwideIn Sizes 3 Through 16
Styles J, S, B, andSC Spacers
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QUADRA-FLEX®4-WayFlexing
Martin QUADRA-FLEX® Couplings, Non Lubricated,Maintenance Free, Easy and Quick Installation
Handles All Combinations of Shock, Vibration, and Misalignment
QUADRA-FLEX® couplingsabsorb parallel misalignmentwithout wear and withminimal loss of energy.The amount of parallel offsethandled varies by size from.015″ on the size 5 up to .062″on the size 16. This minimizesthe radial loads on bearingswhen parallel misalignmentoccurs.
The axial flexibil ity of thesleeve allows the QUADRA-FLEX® coupling to accept alimited amount of end float.This serves to reduce thrustloads transferred to bearings.QUADRA-FLEX® units willaccept axial movement ofapproximately 1/8″.
Due to the flexingcharacteristics of the sleeveand the locking action of theteeth, QUADRA-FLEX®couplings easily handleangular misalignment up to 1degree without anyappreciable wear.
QUADRA-FLEX® sleeves aretorsionally resilient and arewell suited to absorbingshocks and dampeningvibrations that wouldotherwise be transmittedbetween the equipment.
Parallel Angular Torsional Axial
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COUPLINGS
Styles
Available inThreeStyles
Fast Coupling Disassembly Type SC Spacer FlangeMartin offers the first true drop-out spacer assembly for the4JSC spacer coupling. The center portion of the spacer can betaken out, just as in the 5SC thru 14SC, by simply removingfour cap screws in each hub. The couplings center section canthen be lifted out and the pump gaskets exposed. Flats on thespacer hubs facilitate turning shafts with a wrench.
QUADRA-FLEX® SC Spacer Couplings feature all standardspacing requirements for the pump industry. Spacer sizesrange from sizes 4 thru 14.
Type J and S Flanges Type B FlangesBored-to-size flanges are manufactured for a slip fit on standardshafting. Available from stock in a wide range of shaft sizes.
Manufactured from high strength cast iron to fit standard QDbushings in sizes 6 thru 16.
QUADRA-FLEX® couplings come in a variety of styles anddesigns to meet specific customer needs. These includeflanges and sleeves of various types and materials. The totalproduct line includes 13 sizes varying in torque ratings up to72,000 in-lbs.
When ordering QUADRA-FLEX® couplings, the following basicprocedure should help expedite order processing. For couplingflanges, give the basic coupling size, then the letter for the typeflange followed by the bore size required. For coupling sleeves,give the coupling size followed by the letter(s) designating thetype and material required. (See above)
The following are various examples for reference:
Example: Type J Flange
Size Flange Bore5J x 3/4″ 5 J 3⁄4″7S x 30mm 7 S 30mm
(Note: Bored-to-size flanges are furnished with standardkeyway and 2 setscrews unless specified otherwise.)
Example: Type B Flange
Size Flange Bushing8B — SH 8 B SH
(Note: The SH bushing with required bore size should bespecified separately.)
(Note: Unless specified, TPR (3 thru 12) or EPDM (13 thru 16)will be supplied.)
Example: Complete spacer coupling
1 6EM (6 TPR 2 Piece Sleeve)2 6SC35 (Flanges for 31/2″ dropout)1 6H x 1″ (6 Spacer Hub for 1″ Bore)1 6H x 11/8″ (6 Spacer Hub for 11/8″ Bore)
� — #6 Currently Supplied in Cast Iron
Flanges Sleeves
Hubs – (For SC flanges)
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COUPLINGS
SleeveSelection
TPR(Sizes 3-12)
QUADRA-FLEX® couplingsare usually supplied with TPRsleeves in sizes 3-12. TPR isa general use sleeve whichcombines the characteristicsof both EPDM & Neopreneinto one. These sleevesoperate within a temperaturerange from -50° F to +275° F(-46° C to +135° C). Torsionalflexibility is 15°.
*HYTREL®(Sizes 6-14)
Hytrel sleeves are moldedspecifically for high torqueapplications. The type H willtransmit approximately fourtimes as much power as anequivalent TPR, EPDM, orNeoprene sleeve. Hytrel hasan operating temperaturefrom -65° F to +250° F (-54° Cto +121° C). Torsionalflexibility is 7°.Note: Do not use a Hytrelsleeve as a replacement for aTPR, EPDM, or Neoprenesleeve.
EPDM(Sizes 13-16)
QUADRA-FLEX® couplingsare usually supplied withEPDM rubber sleeves in sizes13-16. EPDM is a general usesleeve and can operate withina temperature range from-30° F to +275° F (-34° C to+135° C). Torsional flexibilityis 15°.
NEOPRENE(Sizes 11-16)
Neoprene flexible sleeves arealso available in sizes 11-14.These sleeves offer a higherresistance than EPDM andare self-extinguishing. Oper-ating temperature range forthis sleeve is 0° F to +200° F(-18° C to +93° C). Torsionalflexibility is 15°.
QUADRA-FLEX® coupling sleeves are available in fourdifferent types of compounds. These include TPR(ThermoPlastic Rubber) in types JEM, JEMS, EM; EPDM
Rubber in type E; Neoprene in type N; Hytrel in type H and HS.To determine the sleeve best suited for the application, thematerial characteristics are given below.
Resistance To: TPR EPDM Neoprene� Hytrel�
Acetone A A B BAmmonia, Anhydrous B T A NAmmonium HydroxideSolutions T A A(158F) T
ASTM hydrocarbon test fluid N C X AASTM oil no. 1 B C A AASTM oil no. 3 B C B(158F) AASTM reference fuel A B C A AASTM reference fuel B B C C AASTM reference fuel C B X C BBenzene C C C BButane B B A ACarbon Tetrachloride X C C CChlorobenzene C X X XChloroform X C C CChromic Acid, 10-50% T T C NDowtherm A Solvent X N B NEthyl Alcohol A A A(158F) AEthylene Glycol A A A(158F) AFuel Oil B X A AGasoline B B-C B AGlycerine A T A(158F) AHydraulic Oils B N A AHydrochloric Acid, 20% A T A BHydrogen Peroxide, 88¹⁄₂% N T B T
Resistance To: TPR EPDM Neoprene� Hytrel�
Isopropyl A T A AKerosene B X B TLacquer Solvents T ... C BLubricating Oils B X B(158F) AMethyl Alcohol A T A(158F) AMineral Oil B X A ANaphtha B C C ANitric Acid, 10% A T B BNitrobenzene T A C CPhenol T T B CPhosphoric Acid, 20% A T T NPhosphate Esters A A C APickling Solution(20% Nitric Acid, 4% HF) N X B-C X
Soap Solutions A T A(158F) ASodium Hydroxide, 20% A A A AStearic Acid T T B(158F) TSulfuric Acid, up to 50% A T A(158F) ASulfuric Acid, up to 80% A T B-C CTannic Acid, 10% T T A TToluene C C C BTrichloroethylene C X C CTurpentine B C C NWater A A(158F) A(212F) A(158F)Xylene C C X B
SleeveChemicalResistance
A — Fluid has little or no effectB — Fluid has minor to moderate effectC — Fluid has severe effect
N — No evaluation has been attempted.T — No data; likely to be compatibleX — No data; not likely to be compatible
*Hytrel is a Registered Trademark of Dupont
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SelectionProcedure
SelectionProcedureWhen the driver is an electric motor with standard speed.
Step 1. Determine Service Factor (SF) Symbol based onequipment listed on page C-10.
Step 2. Determine proper Service Factor from chart at top ofpage C-10.
Step 3. Refer to page C-12 and C-13 for proper selection ofcoupling. Based on chemical resistance and operatingenvironment found on page C-8, select from chart the type ofsleeve material. Find RPM of motor, then, in the column forservice factor determined in Step 2, read down to thecorresponding horsepower of motor being used as the driver.The number listed is the correct coupling size.
Example: A coupling is needed to connect a 25 HPstandard electric motor to a lumber log haul at 1750RPM.1. Service Factor Symbol — H2. Service Factor — 2.03. Coupling Size — 9 with TPR sleeve or 6 with Hytrel
Sleeve
Step 4. Select flanges from pages C-15 thru C-19, checkcoupling bore size range for proper shaft fit.
� NOTE: Do not oversize coupling hub — will causepremature wear of element.
When the driver is other than an electric motor or the speedsare different than those shown in the chart on page C-11.
Step 1. Follow steps 1 & 2 in previous procedure.
Step 2. Calculate Horsepower at 100 RPM as follows:
HP at 100 RPM = HP x Service Factor x 100coupling RPM
Step 3. Select coupling size from Tables A or C. Find a HPequal to or greater than the HP/100 RPM
Step 4. Check Maximum bore to be sure that both shaft sizesdo not exceed figure listed for size selected in step 4. Ifmaximum is exceeded select the next largest size which willallow for bore size. Do not exceed maximum RPM for new sizeselected.
Example: A bucket elevator is driven by a motor/reducerand requires a coupling to transmit 14 HP at 1300 RPM.1. Service Factor Symbol — M2. Service Factor — 1.53. HP at 100 RPM = 14 x1.5 x 100 = 1.61 HP/100 RPM
1300
4. Refer to page C-11; under column for 100 RPM therequired 1.61 HP falls between the size 7 (1.2) and thesize 8 (1.8). Correct selection is size 8 with TPR sleeve.Check bore sizes for flanges on pages C-15 thru C-19.
Maximum Types JEM, JEMS, EM, E and N Types H and HSSize RPM Parallel Angular Parallel Angular
Note: Values shown above apply if the actual torque transmitted is more than 1⁄4 the coupling rating.For lesser torque, reduce the above values by 1⁄2.
SelectionChart for TPR1, EPDM,&NeopreneSleeves860 RPM Motor 1160 RPM Motor 1750 RPM Motor 3500 RPM MotorService Factors Service Factors Service Factors Service Factors
Caution: Applications involving reciprocating engines and reciprocating driven devices are subject to critical rotational speeds which may damage the coupling and/orconnected equipment. Contact factory with specific requirements.
Type J sleeves are molded ThermoPlasticRubber (TPR). Available in 1 piece solid(JEM), and 1 piece split, construction(JEMS). TPR material will handle highertemperature ranges as well as be oilresistant.
Types JEM—JEMS
Type EM, E, and N sleeves are of two piecemolded construction with Retaining Ring.They are available in ThermoPlasticRubber (Type TPR), EPDM (Type E), orNeoprene (Type N). These can be usedwith any type flanges within a given sizerange.
TypesEM—E—N
Martin H & HS sleeves are molded Hytrelfor higher torque loading than standardEM sleeves. H & HS sleeves cannot beused with style J and B flanges. Hytrelsleeves are not a direct replacement forTPR, EPDM, or Neoprene sleeves.
TypesH&HS
JEM— JEMS EM - E - N H & HS SleevesCoupling Sleeves Sleeves Hytrel•Size D W Wt. (lb.) D W Wt. (lb.) D W Wt. (lb.)
QUADRA-FLEX® SleevesMartin flexible sleeve elements are offered in four material compounds (ThermoPlastic Rubber (TPR), EPDM, Neoprene, andHytrel) available in three construction styles. Our EM sleeve offers the combination of EPDM’s extended temperature range as wellas the higher oil resistance which Neoprene provides.
Type JEM Type JEMS
Type HSType H
Type EM, E, and N
• 13 & 14 Hytrel available with HS sleeves only.
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Type JFlanges
QUADRA-FLEX® TypeJFlanges
QUADRA-FLEX® TypeJFlangesMartin Type J Flanges are supplied bored to size withstandard keyway and two setscrews to slip fit onstandard shafting.
Coupling Dimensions Weight Finished Bore Sizes• Max.Size C D E G H L T X (lbs.)� (Inches) Bore Millimeters
* Approximate weight for each flange.** 3/8” Bore has no Keyway• J flanges can be rebored if necessary.
Type J Flanges use theMartin JEM 1 Piece,theMartin JEMS 1 piece split and theMartin EM 2 piecesplit sleeves.(Note: Hytrel sleeves are not intended for use withthis type of flange.)
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COUPLINGS
TypeSFlanges
QUADRA-FLEX® TypeSCouplings(Bored toSize)
Type S flexible coupling flanges are bored to size to fit on any standard shaft. They are produced from high strength cast iron.Units are easy to install and remove and are stocked in a wide range of bore sizes as shown on the next page.
Flange Bore (Inches) Hub (Inches)Coupling Diameter Rec. Rec. Hub Diameter Length Thru Hub Proj. WeightSize (D) Stock Max.� Max.�� (H) (C) (E) G L T X (Lbs.)•
� Recommended max. bore with standard keyway.�� Recommended max. bore with shallow keyway. See chart on page C-18 for recommended keyway size.• Approximate weight for each flange.
UP to 1 +.0000 to +.001011⁄16 to 21⁄8 +.0000 to +.001523⁄16 to 25⁄8 +.0000 to +.0020211⁄16 to 311⁄16 +.0000 to +.002533⁄4 to 43⁄4 +.0000 to +.0030413⁄16 to 6 +.0000 to +.0035
6S 21⁄2 15⁄16 15⁄83⁄8 x 1⁄8 3⁄8 x 5⁄16 x 11⁄4 13⁄4 3⁄8 x 1⁄16 3⁄8 x 1⁄4 x 11⁄4 17⁄8 1⁄2 x 1⁄16 1⁄2 x 5⁄16 x 11⁄2213⁄16 19⁄16 3⁄8 x 1⁄8
7S 213⁄16 127⁄32 17⁄8 1⁄2 x 1⁄8 1⁄2 x 3⁄8 x 113⁄168S 31⁄4 23⁄16 21⁄8 1⁄2 x 3⁄16 1⁄2 x 7⁄18 x 21⁄16 23⁄8 5⁄8 x 1⁄8 5⁄8 x 7⁄16 x 115⁄168S 31⁄4 115⁄16 21⁄8 1⁄2 x 3⁄16 1⁄2 x 7⁄18 x 21⁄16 23⁄8 5⁄8 x 1⁄8 5⁄8 x 7⁄16 x 115⁄16
9S 35⁄8 213⁄32 21⁄2 5⁄8 x 3⁄16 5⁄8 x 3⁄8 x 23⁄8 27⁄8 3⁄4 x 1⁄8 3⁄4 x 1⁄2 x 21⁄1641⁄8 29⁄32 21⁄2 5⁄8 x 3⁄16 5⁄8 x 3⁄8 x 23⁄8 27⁄8 3⁄4 x 1⁄8 3⁄4 x 1⁄2 x 21⁄16
10S 43⁄8 221⁄32 27⁄8 3⁄4 x 1⁄4 3⁄4 x 5⁄8 x 211⁄16 33⁄8 7⁄8 x 3⁄16 7⁄8 x 3⁄8 x 211⁄1643⁄4 211⁄16 27⁄8 3⁄4 x 1⁄4 3⁄4 x 5⁄8 x 211⁄16 33⁄8 7⁄8 x 3⁄16 7⁄8 x 3⁄8 x 211⁄1631⁄4 37⁄16 37⁄8 1 x 1⁄4 1 x 3⁄4 x 3
11S 47⁄8 37⁄16 37⁄8 1 x 1⁄4 1 x 3⁄4 x 351⁄4 37⁄16 37⁄8 1 x 1⁄4 1 x 3⁄4 x 355⁄8 31⁄16 37⁄8 1 x 1⁄4 1 x 3⁄4 x 333⁄4 4 315⁄16 1 x 1⁄4 1 x 3⁄4 x 315⁄16
12S 47⁄8 4 315⁄16 1 x 1⁄4 1 x 3⁄4 x 315⁄1653⁄4 4 315⁄16 1 x 1⁄4 1 x 3⁄4 x 315⁄16
FlangesType B flanges are made of high quality cast iron. Thesame high strength cast iron used in the Type S andSC QUADRA-FLEX flanges. Type B is designed toaccommodate Martin QD bushings for easyinstallation and removal. Type B flanges are notintended for use with Hytrel sleeves.
BushingsMartin QD bushings offer convenient mounting of theflange to the shaft securely without setscrews. Theyare tapered and are split through both the bushingflange and taper to provide a clamp fit, eliminatingwobble, vibration, and fretting corrosion. This is thesame bushing used inMartin sprockets and sheavesand is readily available.
Coupling Between Flange Hub Standard Weight2Size Shafts Number Number Keyway D L2 G R (Lbs.)•
� Short (HS) hub also available.• Approximate weight for completely assembled spacer coupling.1 4JSC35 x 11⁄8 has a shallow keyway.2 “L” dimension and weight will change if one or two short (HS) hubs are used.NOTE: Refer to page C-23 to order — specify components separately.
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TypeSCFlangesandHubs
Tables below provide dimensionalinformation for QUADRA-FLEX® Flangesand Hubs used for Spacer Couplings.Assembled dimensions are listed onopposite page. Any of the sleeves shownon page C-14 can be used.
TypeSCFlangesandHubs
� Flanges can be mixed to form different Between-Shaft Dimensions. See chart on page 23.• Approximate weight for each flange.
Stock Bores DimensionsCoupling Hub Max. Plain Bore with Standard Cap Screws WeightSize Number Bore Bore Keyway and Setscrew K H Furnished (Lbs.)•
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Between-ShaftSpacings
QUADRA-FLEX® Between-Shaft SpacingsSpacer couplings are available with the most popular betweenshaft dimensions. Spacings other than standard can beachieved by mixing flanges.The “Standard” column provides spacings using identical
flanges; the “Combination” column provides spacings withmixed flanges; the column headed “Semi-Spacer” uses oneflange that is not made for spacer coupling and therefore doesnot have a detachable hub.
� Check individual coupling size for flange availability.�� Non-StockNOTE: Other combinations available — consultfactory.
Martin QUADRA-FLEX® flanges (hubs) and elastomericelements (sleeves) come in a wide range of sizes and types.First, determine the size and type of coupling componentsrequired. Remove all components from their boxes and looselyassemble the coupling. Do not install the wire ring on the twopiece sleeves at this time. Check maximum RPM values intable against operating speeds.Martin EM sleeves are rated the same as other EPDM andNeoprene sleeves, and may be used interchangeably; however,Hytrel sleeves are rated at different values and may not beinterchanged with Martin EM sleeves, or the EPDM andNeoprene sleeves. Check horsepower and torque ratings whenselecting Hytrel sleeves.
Step 1. Make sure the motor driving the part or components islocked out electrically in such a manner that it cannot be startedby anyone, however remote from the area. The same type oflockout procedure applies to any other driving device whichmay be used. Failure to follow these instructions may result inpersonal injury or property damage.Step 2. Prepare shafts for coupling installation. Inspect allcoupling components and remove any protective coating orlubricants from bores, mating surfaces, and fasteners.Step 3. Slide one coupling flange onto each prepared shaftusing key stock where required. With the QD Type B flange, itmay be necessary to expand the QD bushing bore for ease ofinstallation.Step 4. Position the flange on the shafts to acheive theapproximate “Y” dimension (distance between flanges) shownin table. It is best to have equal shaft length into each flange.Tighten one flange in position, and slide the other flangesufficient distance back to install sleeve. Do not install wire ringon two piece sleeve in its final position at this time, but allow itto hang loosely in groove next to teeth.
Step 5. Slide loose flange on the shaft until the sleeve hasseated completely in teeth of both flanges. Refer to “Y”dimension although not a critical dimension. Secure the flangeto shaft and torque set screws and cap screws to correcttorque values.
Step 6. Check parallel alignment by placing a straight edgeacross the two coupling flanges and measure the maximumoffset at several points around the periphery of coupling. Donot rotate coupling when taking these measurements. Refer totable for maximum allowed offset of parallel alignment. Realignthe coupling if necessary.Step 7. Check angular alignment with a micrometer, vernier, orcaliper. Take measurement from outside to outside of flanges atseveral points around the periphery of coupling. Do not rotatecoupling when taking these measurements. Determine thedifference between maximum and minimum dimensions andcheck to make sure they do not exceed the angluar figure on thetable. If a correction is necessary, recheck parallel alignment.
NOTE: Values shown above may apply if the actual torque transmitted is more than1⁄4 the coupling rating. For lesser torque, reduce the above values by 1⁄2.� Type H & HS sleeves should not be used as direct replacements for JEM or EMsleeves.† Value when using 6J flanges is 2.125.
Step 8. If the coupling employs the two-piece sleeve with wirering, install ring in center groove of sleeve.Note: Some force may be required to seat the ring in groove.Step 9. Install protective guards and/or shields per OSHA andany other additional local or state safety codes as required.
WARNING: Coupling sleeves may be forced from couplingwhen subjected to a severe shock load or abuse.
MaximumRPMandAllowableMisalignment(Dimensions in Inches)
CAUTION: All rotating power transmission products are potentially dangerous and must be properly guarded for the speeds and applications for which they were intended.
�� Maximum bore shown is the maximum bore with standard keyway. It is recommended that this maximum not be exceeded in both halves of a coupling.† Minimum clearance required to remove the coupling half by using the screws as jack screws.
� Space needed for (1) tightening bushing with shortened hex key (2) loosening screws for puller to remove hub.† Minimum clearance required to remove the coupling half by using the screws as jack screws with shortened hex key.
Type TBH Type TBF Bushing DataCoupling Coupling Bushing Max. Min. A B C J� K† L OD Weight
Number Number Used Bore Bore Lbs.
C B
COUPLINGOD
L
AllMartin chain couplings have hardened teeth
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StockFlexibleCouplings
Roller chain couplings have a torque capacity in excess of the torque normallytransmitted by shafting which falls within the coupling bore range. Select the smallestcoupling which will accomodate both shafts. For a reversing operation, shock orpulsating loads, or other severe operating conditions, select the next larger couplingsize.
A cover should be used to assure maximum service life, particularly if the couplingoperates at high speeds or under moist conditions. For proper lubrication, fill the spacebetween the cover and the coupling with soft to medium consistency coupling grease.
CouplingWithPlainBores forReboring
Covers Fit Taper Bushed, QD and Stock, and Finished Bore Couplings. Covers allowexcellent lubrication, and their use is recommended to obtain maximum coupling life.Covers are of aluminum and are made in halves for easy installation. Synthetic rubberoil seals, which contact the coupling hubs, retain the lubricant and prevent the entry ofdirt. Covers are fitted with gaskets between the halves.
AllMartin chain couplings have hardened teeth
Type TBF
Type TBH
* Use 8018 cover — Special Seals Available** Furnished in Plastic unless specified with “AL”Suffix when ordering.
JawCouplingSelectionProcedureA. Determine Service Factor by Matching Driven Unit with Prime Mover in Service Factor Guide.B. Multiply Service Factor by Driven Unit or Motor H.P. to Obtain Adjusted H.P.C. Select Flexible Coupling with Horsepower Capacity Equal to or Greater than Adjusted H.P.
Service Factor Guide Prime MoverElectric Motor or Gasoline or Diesel Gasoline or Diesel
Driven Unit (Machinery) Steam Turbine Engine, 6 or More Cyl. Engine, Less Than 6 Cyl.
1.0 1.5 2.0
1.5 2.0 2.5
2.0 2.5 3.0
NOTE: Above H.P. capacities are for Buna-N rubber spider and service factor of one. When Hytrel spider is used multiply capacities by three.
NOTE: Above H.P. capacities are for Buna-N rubber spider and service factor of one. When Hytrel spider is used multiply capacities by three.Misalignment Capacities: Angular up to 1°, Parallel up to .015 inches.Hytrel is a registered trademark of E.I. DuPont & Co.
Light: Uniform or steady load never exceeding horsepower rating, infrequent starting. Agitators,Blowers, Conveyors, Evaporators, Fans, Generators, Centrifugal Pumps, Stokers
Moderate: Heavy inertia, moderate shock, frequent starting; peak loads do not exceed 125 per centaverage horsepower. Uneven load. Beaters, Rotary Pumps and Compressors, Cranes, Elevators,Mine and Propellor Fans, Generators, Pulp Grinders, Hoists, Kilns, Machine Tools, Mixers, GearPumps, Woodworking Machines
Heavy: Heavy shock conditions or frequent reversing. Peak loads do not exceed 150 per centaverage horsepower. Uneven load. Reciprocating Pumps and Compressors, Crushers, Freight andPassenger Elevators, Mills (Hammer, Ball, Rolling, Turf, Flour), Vibrating Screens, Winches, WireDrawing Machines, Punches, Shears
Torque Rating Buna-NCatalog Lb. — In. Horsepower Capacity at Various RPM Max. (Each)
Number Buna-N Hytrel® 100 300 1200 1800 3600 Bore Weight
ML or MS 090-095 .04 0.17095 095SUL099/ SBL099/ ML or MS 099-100 .07 0.50100 100SUL110 SBL110 ML110 — MS110 .14 0.62SUL150 SBL150 ML150 — MS150 .21 1.00SUL190 SBL190 ML190 — MS190 .27 1.30SUL225 SBL225 ML225 — MS225 .41 1.60
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COUPLINGS
Stock JawCouplings
Bore sizes are standard in 1/16″ increments from minimum to maximum bore range and have keywayand set screw except as shown below:1/8 through 3/8 Bore — No KW—No SS#050 — 7/16 through 5/8 Bore — No KW— 1-SS#070, 075, 090, 095 — 7/16 and 1/2 Bore — No KW— 1-SS#099, 100, 110 — 1/2 Bore — No KW— No SS#150 — 5/8 Bore — No KW— No SS#190, 225 — 3/4 Bore — No KW— No SSNOTE: In each coupling size a min. plain bore is available that can be used to make special boressuch as spline, hex, metric, or other shapes or sizes.
For Standard Keyway sizes seeMartin Catalog, page E-158 and E-159.
NOTE: Coupling Sizes are based on the rated torque, max. bore and a have a service factor of 1.0.
* When Using Hytrel or Bronze spider multiply above horsepower ratings by 3.† When using Urethane spider multiply above horsepower ratings by 1.5.
Y Z Clamp Ring BoltsCoupling A B C D E F H J K* L M N P B.C. B.C. No. and Size*** TorqueSize Dia. Dia. Capscrews In Lbs.
* Clearance required to remove bushing using pull-up capscrews as jackscrews.** Shaft ends are normally M or N apart; they may project beyond the bushings. In this case allow space for end float and misalignment.*** Grade 8.Dimensions in inches.
Other Sizes Available as Made-to-Order
Rubber tire element also available in Neoprene.
Dimensions
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COUPLINGS
Martin-Flex®Couplings
Martin Flex® flexible couplings smoothly transmit power while compensating for shaft misalignment to 4°, parallel misalignmentto 1/8″ and end float to 5/16″. The two piece flange design provides quick and easy installation and the elastomeric element absorbsshock and torsional vibration through a wide temperature range.
Selection Procedure1. Select the proper service factor from Chart 1.2. Determine Design Horsepower by multiplying the Service Factor and the Drive Horsepower.3. Locate the intercept of Shaft Speed and Design Horsepower from Chart 2.4. Order per coupling: (2) bushings, (2) flange assemblies, (1) flexible tire element.
Chart 1 ServiceFactors
Chart 2 SizeSelection
AGITATORSPaddle or Propeller(Vert. or Horiz.), Screw ..... 1.0
BREWING AND DISTILLINGBottling Machinery,Brew Kettle, Cooker(Cont. Duty), Mash Tub ..... 1.0Scale Hopper —Frequent Starting Peaks .... 1.5
The service factors listed are intended only as a general guidefor smooth power sources such as electric motors and steamturbines. Add 0.5 to factor for somewhat rougher power sourcessuch as internal combustion engines of four or more cylinders,steam engines and water turbines. Where substantial shockoccurs or starting or stopping is frequent as on some “inching”drives and on some reversing drives or where the power sourceis an internal combustion engine with less than four cylinders —consult factory. Where torsional vibrations occur as in, forexample, internal combustion engines or reciprocatingcompressors or pump applications, check the coupling forpossible development of damaging large amplitude vibrations.