Spline Shafts And Couplings

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Spline shafts and couplings are used in power transmission systems to transfer torque and rotation from one component to another. Spline shafts have a long, cylindrical rod-type design with a series... Read More

StyleModelRough Stock BoreMax. BoreLength through BoreOutside Dia.Overall LengthRated TorqueMax. Shock LoadPrice (inc. GST)
A685144260811"2.225"2.5"6.28"7.44"2000 In.Lbs.6000 In.Lbs.A$ 2294.43
A685144260852-1/8"4"4.34"11.09"12.66"12000 In.Lbs.36000 In.Lbs.A$ 8426.66
StyleModelCoupling SizeDimension ADimension BDimension FDimension HDimension JFree End Float +/-InertiaPrice (inc. GST)
AAX30305.63"6.3"1.88"3.3"3.18"0.065"51.7 lbs.-sq. ft.A$ 23.23
AAX35356.63"7.17"2 1/4"4.15"2.81"0.085"108 lbs.-sq. ft.A$ 25.81
StyleModelCoupling SizeDimension BcDimension DDimension FdDimension Fl1Dimension HdDimension SLengthPrice (inc. GST)
A68514413923UF501.5"1.88"2"0.25"2"1.56"1.56"A$ 608.51
A68514413952UF1504.38"5"5.38"0.5"3.75"3.44"3.44"A$ 2941.38
StyleModelBore SizeCoupling SizeDimension BcDimension DDimension FdDimension Fl1Dimension HdDimension HlPrice (inc. GST)
A685144137403/8"RRU752"2.38"2.5"0.38"2.5"1.25"A$ 390.98
RFQ
A685144136957/16"RRU501.5"1.88"2"0.25"2"1"A$ 308.58
RFQ
StyleModelAxial Misalignment (Δ Ka)Bore Dia.Bore SizeDimension HdHub SizeLength Through BoreMax. BoreMax. Parallel Misalignment (in.)Price (inc. GST)
A685144419500.01"0.5"3/8 x 3/8"1.04"U50S0.5"0.5"0.014"A$ 747.49
A685144131030.015"0.375"3/8 x 3/8"0.86"U37S0.52"0.375"0.009"A$ 886.03
A685144448090.015"0.375"1/4 x 3/8"0.86"U37S0.52"0.375"0.009"A$ 886.03
A685144133590.02"0.75"3/8 x 3/8"1.42"U75S0.84"0.75"0.019"A$ 1241.64
A685144508490.02"0.625"5/16 x 5/16"1.42"U62S0.62"0.625"0.019"A$ 1030.68
StyleModelAxial Misalignment (Δ Ka)Bore SizeDimension HdHub SizeItemLength Through BoreMax. BoreMax. Parallel Misalignment (in.)Price (inc. GST)
A685144130150.01"1/4 x 1/4"0.61"U18RShaft and Coupling0.31"0.25"0.008"A$ 597.88
A685144130400.02"5/16 x 5/16"0.73"U25RShaft and Coupling0.38"0.313"0.011"A$ 729.32
A685144130840.02"3/8 x 3/8"0.86"U37RFlange To Shaft Coupling0.52"0.375"0.014"A$ 886.03
A685144260950.02"1/4 x 1/4"0.73"U25RShaft and Coupling0.38"0.313"0.011"A$ 579.78
A685144442170.035"3/8 x 3/8"1.04"U50RShaft and Coupling0.64"0.5"0.021"A$ 940.26
A685144131390.035"1/2 x 1/2"1.04"U50RShaft and Coupling0.64"0.5"0.021"A$ 940.26
A685144510460.035"5/16 x 5/16"1.04"U50RShaft and Coupling0.64"0.5"0.021"A$ 747.49
A685144132090.035"5/16 x 5/16"1.42"U62RShaft and Coupling0.84"0.625"0.019"A$ 1030.68
A685144510370.04"3/8 x 3/8"1.42"U75RShaft and Coupling0.84"0.75"0.028"A$ 1241.64
StyleModelAxial Misalignment (Δ Ka)Bore SizeDimension HdHub SizeItemKeyway SizeLength Through BoreMax. BorePrice (inc. GST)
A685144132550.035"5/8 x 5/8"1.42"U62RShaft and Coupling3/16 x 3/32"0.84"0.625"A$ 1030.68
A685144443070.035"1/2 x 5/8"1.42"U62RShaft and Coupling1/8 x 1/16 And 3/16 x 3/32"0.84"0.625"A$ 1030.68
A685144261050.04"3/4 x 3/4"2.11"U100RShaft and Coupling3/16 x 3/32"1.29"1"A$ 1767.54
A685144133510.04"3/4 x 3/4"1.42"U75RShaft and Coupling3/16 x 3/32"0.84"0.75"A$ 1241.64
A685144442190.04"1 3/8 x 1 7/16"2.98"U150RShaft and Coupling5/16 x 5/32 And 3/8 x 3/16"1.88"1.5"A$ 3664.67
A685144260990.04"5/8 x 5/8"1.42"U75RShaft and Coupling3/16 x 3/32"0.84"0.75"A$ 1241.64
A685144135410.04"1 1/4 x 1 1/4"2.17"U125RFlange To Shaft Coupling1/4 x 1/8"1.28"1.25"A$ 2145.75
A685144483250.04"3/4 x 3/4"2.17"U125RShaft and Coupling3/16 x 3/32"1.28"1.25"A$ 2145.75
A685144134610.04"1 x 1"2.11"U100RShaft and Coupling1/4 x 1/8"1.29"1"A$ 1916.71
A685144441080.04"5/8 x 3/4"1.42"U75RShaft and Coupling3/16 x 3/32"0.84"0.75"A$ 1241.64
A685144134090.04"7/8 x 7/8"1.73"U87RShaft and Coupling3/16 x 3/32"0.84"0.875"A$ 1259.66
StyleModelAxial Misalignment (Δ Ka)Bore SizeDimension HdHub SizeItemKeyway SizeLength Through BoreMax. BorePrice (inc. GST)
A685144260980.01"1/2 x 1/2"1.04"U50SFlange To Shaft Coupling1/8 x 1/16"0.5"0.5"A$ 940.26
A685144134930.02"1 x 1"2.11"U100SShaft and Coupling1/4 x 1/8"1"1"A$ 1916.71
A685144261030.02"5/8 x 5/8"1.73"U87SShaft and Coupling3/16 x 3/32"0.84"0.875"A$ 1350.15
A685144457170.02"7/8 x 7/8"2.54"U137SShaft and Coupling3/16 x 3/32"1.01"1.375"A$ 3013.71
A685144445840.02"1 x 1 1/4"2.17"U125SShaft and Coupling1/4 x 1/8"1.1"1.25"A$ 2145.75
A685144452480.02"5/8 x 7/8"1.73"U87SShaft and Coupling3/16 x 3/32"0.84"0.875"A$ 1350.15
A685144463090.02"5/8 x 1"2.11"U100SShaft and Coupling3/16 x 3/32 And 1/4 x 1/8"1"1"A$ 1767.54
A685144134260.02"7/8 x 7/8"1.73"U87SShaft and Coupling3/16 x 3/32"0.84"0.875"A$ 909.33
RFQ
A685144474420.02"1/2 x 1/2"1.42"U62SShaft and Coupling1/8 x 1/16"0.62"0.625"A$ 1030.68
A685144133840.02"3/4 x 3/4"1.42"U75SShaft and Coupling3/16 x 3/32"0.84"0.75"A$ 1159.59
A685144454770.02"1/2 x 5/8"1.42"U62SShaft and Coupling1/8 x 1/16 And 3/16 x 3/32"0.62"0.625"A$ 972.32
A685144261000.02"5/8 x 5/8"1.42"U75SShaft and Coupling3/16 x 3/32"0.84"0.75"A$ 1159.59
A685144441130.02"1 x 1"2.17"U125SShaft and Coupling1/4 x 1/8"1.1"1.25"A$ 2145.75
A685144133000.02"5/8 x 5/8"1.42"U62SShaft and Coupling3/16 x 3/32"0.62"0.625"A$ 1030.68
A685144261040.02"3/4 x 3/4"1.73"U87SShaft and Coupling3/16 x 3/32"0.84"0.875"A$ 1350.15
A685144135700.02"1 1/4 x 1 1/4"2.17"U125SFlange To Shaft Coupling1/4 x 1/8"1.1"1.25"A$ 1973.71
A685144451930.02"5/8 x 5/8"2.17"U125SShaft and Coupling3/16 x 3/32"1.1"1.25"A$ 2145.75
StyleModelCoupling SizeDimension ADimension FDimension GDimension HDimension JFree End Float +/-Inertia At D Min.Price (inc. GST)
AAP30305.63"1.88"0.47"3.3"1.14"0.065"77.7 lbs.-sq. ft.A$ 17.60
AAP35356.63"2 1/4"0.55"4.15"0.97"0.085"156 lbs.-sq. ft.A$ 19.24
StyleModelAngular MisalignmentCoupling SizeDimension BDimension CDimension HMax. Angular MisalignmentMax. BoreMax. Bore O/s
ATFI00380.5°386.3"1.77"2.891"-2.19" , 58" , 76"3"
RFQ
ATFI00270.5°275.91"1.57"2.143"0.5° /disc pack1.56" , 42" , 57"2 1/4"
RFQ
ATFI01400.5°1409.84"2.95"3.757"-2 3/4" , 75"-
RFQ
ATFI02600.5°26011.42"3.35"4.662"0.5° /disc pack3.44" , 95"-
RFQ
ATFI04000.5°40013.78"4.13"5.568"-116" , 4.19"-
RFQ
ATFI07500.5°75016.14"4.72"6.46"-132" , 4.63"-
RFQ
ATFI13100.5°131019.29"5.71"7.76"-162" , 5.63"-
RFQ
ATFI19000.33°190019.69"5.91"9.17"-192" , 6 3/4"-
RFQ
ATFI25000.33°250021.57"6.46"9.45"0.33° /disc pack197" , 6.88"-
RFQ
ATFI33000.33°330023.78"7.17"10.63"-220" , 7.63"-
RFQ
ATFI60000.33°600028.35"9.06"12.68"-265" , 9"-
RFQ
ATFI85000.33°850033.07"10.24"14.37"0.33° /disc pack10.63" , 302"-
RFQ
ATFI120000.33°1200036.38"11.5"16.02"0.33° /disc pack11.5" , 337"-
RFQ
TB WOODS -

HSH Form Flex Couplings

TB Wood's HSH Form-Flex couplings are designed to transmit torque while compensating for angular, parallel and axial misalignment between two connected shafts. They minimise misalignment forces on the connected equipment and are widely used in cooling fan drive applications. These couplings are available with steel and composite spacer tubing that reduces total cost by eliminating the need for bearings and support structures. The brand's HSH Series Form-Flex couplings range from 1000 rpm to 3800 rpm. A wide range of these couplings (with bore length up to 11 inches) is available on Raptor Supplies.

StyleModelCoupling SizeDimension ADimension BDimension DDimension FDimension GDimension HFree End Float +/-
AHSH22225.88"8.02"3.02"2 1/2"0.43"3.87"0.036"
RFQ
AHSH26266.88"9.25"3 1/2"2.88"0.55"4 1/2"0.044"
RFQ
AHSH31318.12"10.87"4.12"3.37"0.62"5 1/2"0.052"
RFQ
AHSH35359.12"12.06"4.57"3 3/4"0.66"6.12"0.056"
RFQ
AHSH373710.06"13.12"5.14"4"0.81"6 1/2"0.062"
RFQ
AHSH424211"13.93"5.43"4 1/4"0.81"7"0.067"
RFQ
AHSH454511.87"14.75"5 3/4"4 1/2"0.87"7.43"0.072"
RFQ
AHSH505012.9"16.81"6.81"5"1.06"8.37"0.082"
RFQ
AHSH555515"18.68"7.68"5 1/2"1 1/4"9.5"0.092"
RFQ
AHSH606016"20.93"8.43"6 1/4"1.34"10.5"0.102"
RFQ
AHSH707018.5"23.62"9.56"7"1 1/2"11 3/4"0.115"
RFQ
AHSH757520"25"10.5"7 1/4"1.53"13"1/8"
RFQ
AHSH808022"26.87"11.37"7 3/4"1.56"13.75"0.136"
RFQ
AHSH858523.75"28.62"12.12"8.25"1.62"14.5"0.14"
RFQ
AHSH929225.75"31"13.01"9"1 3/4"15.87"0.156"
RFQ
AHSH92HT92HT25.75"31"13.01"9"1 3/4"15.87"0.156"
RFQ
Stafford Mfg -

Signature Series, One Piece Split Precision Sleeve Couplings

StyleModelBore SizeKeyway SizeOutside Dia.Screw SizeTotal LengthTypePrice (inc. GST)
A5L100100FKPSC1"1/4"2"1/4-28 x 3/43"High StrengthA$ 320.45
RFQ
B5L100100KPSC1"1/4"2"1/4-28 x 3/43"High StrengthA$ 247.10
RFQ
A5L108108FKPSC1-1/2"3/8"2.500"1/4-28 x 3/43.750"High StrengthA$ 410.94
RFQ
B5L108108KPSC1-1/2"3/8"2.500"1/4-28 x 3/43.750"High StrengthA$ 360.93
RFQ
A5L104104FKPSC1-1/4"1/4"2.250"1/4-28 x 3/43.375"High Strength-
RFQ
B5L104104KPSC1-1/4"1/4"2.250"1/4-28 x 3/43.375"High Strength-
RFQ
A5L008008FKPSC1/2"1/8"1.250"8-32 x 1/21.875"High StrengthA$ 268.19
RFQ
B5L008008KPSC1/2"1/8"1.250"8-32 x 1/21.875"High StrengthA$ 201.86
RFQ
B5L012012KPSC3/4"3/16"1.750"1/4-28 x 3/42.625"High StrengthA$ 230.69
RFQ
A5L012012FKPSC3/4"3/16"1.750"1/4-28 x 3/42.625"High StrengthA$ 269.22
RFQ
A5L010010FKPSC5/8"3/16"1.500"10-32 x 5/82.250"High StrengthA$ 313.06
RFQ
B5L010010KPSC5/8"3/16"1.500"10-32 x 5/82.250"High StrengthA$ 244.54
RFQ
C5LM012012KPSC12 mm4mm28mmM4 x 0.7 x 12 mm45 mmPrecision SleeveA$ 180.03
RFQ
C5LM014014KPSC14 mm5mm30mmM4 x 0.7 x 12 mm50 mmPrecision SleeveA$ 194.72
RFQ
C5LM015015KPSC15 mm5mm34mmM5 x 0.8 x 16 mm50 mmPrecision SleeveA$ 200.51
RFQ
C5LM016016KPSC16 mm5mm34mmM5 x 0.8 x 16 mm50 mmPrecision SleeveA$ 186.30
RFQ
C5LM018018KPSC18 mm6 mm36mmM5 x 0.8 x 16 mm60 mmPrecision SleeveA$ 191.52
RFQ
C5LM020020KPSC20 mm6 mm40mmM6 x 1.0 x 18 mm65 mmPrecision SleeveA$ 271.52
RFQ
C5LM025025KPSC25 mm8 mm45mmM6 x 1.0 x 18 mm65 mmPrecision SleeveA$ 227.23
RFQ
C5LM030030KPSC30 mm8 mm54mmM6 x 1.0 x 16 mm75 mmPrecision Sleeve-
RFQ
C5LM035035KPSC35 mm10mm57mmM6 x 1.0 x 18 mm80 mmPrecision Sleeve-
RFQ
C5LM040040KPSC40 mm12mm60mmM6 x 1.0 x 18 mm90 mmPrecision SleeveA$ 483.14
RFQ
C5LM045045KPSC45 mm14mm73mmM8 x 1.25 x 25 mm105 mmPrecision Sleeve-
RFQ
Stafford Mfg -

Signature Series, Two Piece Split Precision Sleeve Couplings

StyleModelBore SizeGradeKeyway SizeMaterialOutside Dia.Screw MaterialScrew SizeTotal LengthPrice (inc. GST)
A13C1001001"--316 Stainless Steel2.125"-1/4-28 x 5/83.250"-
RFQ
B13A100100PSC1"2024-Aluminum2.125"Alloy Steel1/4-28 x 3/43.250"-
RFQ
C15A100100PSC1"2024-Aluminum2.500"Alloy Steel1/4-28 x 3/43.750"A$ 365.09
RFQ
D13L100100PSC1"1215-Steel2.125"Alloy Steel1/4-28 x 3/43.250"A$ 345.38
RFQ
E15C1001001"--316 Stainless Steel2.500"-1/4-28 x 5/83.750"-
RFQ
F15S100100PSC1"303-Stainless Steel2.500"18-8 Stainless Steel1/4-28 x 5/83.750"A$ 338.05
RFQ
G15L100100PSC1"1215-Steel2.500"Alloy Steel1/4-28 x 3/43.750"A$ 214.85
RFQ
H13S100100PSC1"303-Stainless Steel2.125"18-8 Stainless Steel1/4-28 x 5/83.250"-
RFQ
E15C0080081/2"--316 Stainless Steel1.750"-1/4-28 x 5/82.625"-
RFQ
H13S008008PSC1/2"303-Stainless Steel1.250"18-8 Stainless Steel8-32 x 1/21.875"-
RFQ
A13C0080081/2"--316 Stainless Steel1.250"-8-32 x 1/21.875"-
RFQ
B13A008008PSC1/2"2024-Aluminum1.250"Alloy Steel8-32 x 1/21.875"-
RFQ
D13L008008PSC1/2"1215-Steel1.250"Alloy Steel8-32 x 1/21.875"A$ 151.39
RFQ
F15S008008PSC1/2"303-Stainless Steel1.750"18-8 Stainless Steel1/4-28 x 5/82.625"-
RFQ
C15A008008PSC1/2"2024-Aluminum1.750"Alloy Steel1/4-28 x 3/42.625"A$ 224.26
RFQ
G15L008008PSC1/2"1215-Steel1.750"Alloy Steel1/4-28 x 3/42.625"A$ 152.10
RFQ
E15C0040041/4"--316 Stainless Steel1.063"-6-32 x 3/81.625"-
RFQ
B13A004004PSC1/4"2024-Aluminum0.813"Alloy Steel4-40 x 3/81.250"A$ 191.33
RFQ
H13S004004PSC1/4"303-Stainless Steel0.813"18-8 Stainless Steel4-40 x 5/161.250"-
RFQ
G15L004004PSC1/4"1215-Steel1.063"Alloy Steel6-32 x 3/81.625"A$ 112.45
RFQ
C15A004004PSC1/4"2024-Aluminum1.063"Alloy Steel6-32 x 3/81.625"-
RFQ
F15S004004PSC1/4"303-Stainless Steel1.063"18-8 Stainless Steel6-32 x 3/81.625"-
RFQ
D13L004004PSC1/4"1215-Steel0.813"Alloy Steel4-40 x 3/81.250"A$ 195.62
RFQ
A13C0040041/4"--316 Stainless Steel0.813"-4-40 x 5/161.250"-
RFQ
H13S012012PSC3/4"303-Stainless Steel1.875"18-8 Stainless Steel1/4-28 x 5/82.875"-
RFQ
StyleModelBore SizeBore Size ABore Size BOutside Dia.Total Length
AUPS-A012008N-0.750"0.500"1.750"2.500"
RFQ
AUPS-A100008N-1"0.500"2"3"
RFQ
AUPS-A100012N-1"0.750"2"3"
RFQ
AUPS-A008008N0.500"--1.375"2"
RFQ
AUPS-A012012N0.750"--1.750"2.500"
RFQ
AUPS-A100100N1"--2"3"
RFQ
StyleModelBore SizeBore Size ABore Size BOutside Dia.Total Length
AUPS-A012008P-0.750"0.500"1.750"2.500"
RFQ
AUPS-A100008P-1"0.500"2"3"
RFQ
AUPS-A100012P-1"0.750"2"3"
RFQ
AUPS-A008008P0.500"--1.375"2"
RFQ
AUPS-A012012P0.750"--1.750"2.500"
RFQ
AUPS-A100100P1"--2"3"
RFQ
Stafford Mfg -

Solution Series, UPS Sliding Mounts

StyleModelInside Dia.Outside Dia.Total Length
AUPS-A008SM0.500"1.375"1.375"
RFQ
BUPS-A008SMU0.500"1.625"2.750"
RFQ
AUPS-A012SM0.750"1.750"1.750"
RFQ
BUPS-A012SMU0.750"1.750"3"
RFQ
AUPS-A100SM1"2"2.125"
RFQ
BUPS-A100SMU1"2"3.250"
RFQ
HUB CITY -

Involute Splined Couplings

StyleModelPrice (inc. GST)
A0332-00028A$ 154.74
RFQ
B0332-00043A$ 158.63
RFQ
C0332-00030A$ 344.35
RFQ
D0332-00027A$ 147.00
RFQ
E0332-00350A$ 164.43
RFQ
HUB CITY -

Involute Splined Shafts

StyleModelPrice (inc. GST)
A0332-00025A$ 317.25
RFQ
B0332-00395A$ 390.74
RFQ
HUB CITY -

Precision Splined Hubs

StyleModelPrice (inc. GST)
A0332-00031A$ 216.67
RFQ
B0332-00033A$ 189.59
RFQ
C0332-00074A$ 419.80
RFQ
D0332-00073A$ 311.43
RFQ
E0332-00037A$ 516.50
RFQ
F0332-00093A$ 311.43
RFQ
StyleModelBore SizeItemPrice (inc. GST)
A685144138723/4"Flange To Shaft CouplingA$ 1241.64
A685144138705/8"Shaft and CouplingA$ 1241.64
TB WOODS -

AX Form Flex Couplings

TB Wood's AX Series Form-Flex couplings transfer mechanical power & torque between two shafts and accommodate angular, parallel & axial misalignment. They are ideal for pumps, centrifugal & screw compressors, fans, blowers, mixers and turbo compressors, where two fully supported shafts are located very close together (1/8 to 2 inches). Choose from a wide range of AX Series Form-Flex couplings, available in bore sizes of 1.69, 1.75 and 2 inches on Raptor Supplies.

StyleModelCoupling SizeDimension ADimension BDimension FDimension GDimension HDimension JFree End Float +/-Price (inc. GST)
AAX552.65"3.34"1"0.48"1.3"1.68"0.03"-
RFQ
AAX10103.19"3.4"1"0.48"1.3"1.79"0.04"-
RFQ
AAX15153.65"3.8"1.13"0.44"2"1.85"0.042"-
RFQ
AAX20204.08"4.22"1.32"0.48"2.4"1.66"0.055"-
RFQ
AAX25254.95"5.36"1.62"0.69"2.8"2.39"0.06"A$ 22.06

Spline Shafts And Couplings

Hub City spline shafts are specially designed for transmitting high amount of torque force and rotation. These plain and involute splined shafts feature 1215 cold-rolled steel to deliver fair vibration damping and excellent chemical resistance. We also offer Hub City couplings in 1144 stress-proofed steel to connect and transmit torque between two rotating shafts. These couplers feature Kwik-D-Tach connection for safe and secure attachments.

Working Mechanism

  • The shafts of the machinery are positioned in such as way that their ends are facing each other.
  • The spline shaft is inserted securely into the grooves of the coupling.
  • The coupling is then fastened onto the end of the other shaft by using bolts or clamps.
  • When torque is applied to one of the shafts, it is transmitted through the spline shaft and coupling to the other shaft, causing both shafts to rotate at the same speed.

Features

TB Woods Form-Flex Couplings :

  • They help transmit torque while compensating for angular, axial and parallel misalignment between two connected shafts.
  • These spacer couplings allow enough space for installation and maintenance without moving the connected machinery.
  • They feature a metal disc that uses a double hinge effect through two flexible discs and a spacer, causing both shafts to rotate at the same speed.
  • If the shafts are misaligned, the flexible element deflects and absorbs the displacement, reducing the transmission of vibration and shock between the two shafts.

Lovejoy U-Type Couplings :

  • These Uniflex couplings are used in a variety of applications, including high misalignment, space limitations, high temperature and exceptionally low backlash or windup conditions.
  • They feature a flexible triple-wound spring design that helps transmit torque between two rotating shafts while accommodating vibrations.
  • These compact couplings contain two hubs that are brazed to the speed spring pack to create a durable one-piece flexible coupling.
  • They are supplied with keyways and set screws for offering a secure and accurate connection between the coupling and the shafts.
  • These short-version couplings can accommodate different length requirements and provide a maximum OAL (overall length) tolerance of 1/8 inches.
  • They are ideal for applications like textile equipment, robotic / positioning, conveyors, carton folding and glueing equipment, machine tools, blowers and the steering mechanism.

Frequently Asked Questions

What is overall length tolerance?

OAL (overall length tolerance) refers to the allowable deviation from the nominal or desired length of the coupling. It helps to position and align the coupling on the shafts it is connecting.

What is the purpose of keyways in Lovejoy couplings?

Keyways are grooves or slots that are machined into the bore of the coupling hub and include a matching key that is installed in the keyway to connect the hub to the shaft. These keyways help transmit torque, ease installation and provide accurate alignment between the shaft and the coupling.

How to maintain a spline coupling?

  • Regular visual inspections are needed to identify any signs of wear or damage of the spline coupling, such as cracks and corrosion.
  • Ensure the coupling is properly aligned to maintain smooth operation and prevent premature wear.
  • Regularly lubricate the coupling to prevent wear and reduce friction.
  • Ensure that spline couplings are not subjected to overload conditions, as this can cause permanent deformation and reduce the strength of the spline teeth.

How do I select the right type of shaft coupling for my application?

The choice of coupling depends on shaft misalignment, torque requirements, speed and environmental conditions.

What is the difference between rigid couplings and flexible couplings?

Rigid couplings do not allow any angular or parallel misalignment between shafts. They provide a solid, backlash-free connection. In contrast, flexible couplings accommodate some degree of misalignment and are often used to dampen vibrations and shock loads in machinery.

How do I calculate the torque capacity of a spline shaft?

    To calculate the torque capacity of a spline shaft, you can use the formula:
    • Torque (T) = Shaft Diameter (D) x Material Strength (S) x Safety Factor (SF)

What is the difference between external spline and internal spline configurations?

External spline refers to the presence of the splines on the outside surface of a shaft, while internal spline refers to the splines inside a cylindrical bore.

How does rigid, flexible and fluid connection coupling differ from each other?

Rigid couplings provide a solid connection with no flexibility, flexible couplings offer misalignment compensation, and fluid couplings use hydraulic principles for torque transmission and speed control.

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