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.

Spline Shafts And Couplings

Filter

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

TB WOODS -

A5 Form Flex Couplings
TB Wood’s A5 Form-Flex couplings are designed for transmiting torque while compensating for axial, angular & parallel misalignment between two connected shafts. These easy-to-install couplings protect equipment from shock, vibration & misalignment, and are widely used in cooling fan drive applications. These metal couplings have zero backlash & high torsional stiffness and are ideal for printing applications & positioning systems. The brand’s A5 Series flexible couplings are available in 0.48, 1.27, 3.49, 6.03 & 18 HP ratings at 100 rpm. Choose from a wide range of TB Wood’s flex couplings in 5, 10, 20, 25 & 35 sizes on Raptor Supplies.

Style	Model	Coupling Size	Dimension A	Dimension F	Dimension G	Dimension H	Free End Float +/-	Inertia At D Min.	Max. Bore	Price (inc. GST)
A	A505	5	2.65"	1"	0.24"	1.3"	0.03"	1.93 lbs.-sq. ft.	0.88" , 1.19"	-	RFQ
A	A510	10	3.19"	1"	0.27"	1.8"	0.04"	4.83 lbs.-sq. ft.	1 1/4" , 1.63"	-	RFQ
A	A515	15	3.65"	1.13"	0.32"	2"	0.042"	9.36 lbs.-sq. ft.	1 3/4" , 1.38"	-	RFQ
A	A520	20	4.08"	1.32"	0.34"	2.4"	0.055"	15.36 lbs.-sq. ft.	1.69" , 2.13"	-	RFQ
A	A525	25	4.95"	1.62"	0.45"	2.8"	0.06"	42.07 lbs.-sq. ft.	2" , 2.56"	-	RFQ
A	A530	30	5.63"	1.88"	0.47"	3.3"	0.065"	84.97 lbs.-sq. ft.	2.38" , 2.88"	A$ 75.97	RFQ
A	A535	35	6.63"	2 1/4"	0.55"	4.15"	0.085"	170.84 lbs.-sq. ft.	2.94" , 3 3/4"	-	RFQ

LOVEJOY -

U Type without Keyway, Regular Version, Inch Bores

Style	Model	Axial Misalignment (Δ Ka)	Bore Size	Dimension Hd	Hub Size	Item	Length Through Bore	Max. Bore	Max. Parallel Misalignment (in.)	Price (inc. GST)
A	68514413015	0.01"	1/4 x 1/4"	0.61"	U18R	Shaft and Coupling	0.31"	0.25"	0.008"	A$ 597.88
A	68514413040	0.02"	5/16 x 5/16"	0.73"	U25R	Shaft and Coupling	0.38"	0.313"	0.011"	A$ 729.32
A	68514413084	0.02"	3/8 x 3/8"	0.86"	U37R	Flange To Shaft Coupling	0.52"	0.375"	0.014"	A$ 886.03
A	68514426095	0.02"	1/4 x 1/4"	0.73"	U25R	Shaft and Coupling	0.38"	0.313"	0.011"	A$ 579.78
A	68514451046	0.035"	5/16 x 5/16"	1.04"	U50R	Shaft and Coupling	0.64"	0.5"	0.021"	A$ 747.49
A	68514444217	0.035"	3/8 x 3/8"	1.04"	U50R	Shaft and Coupling	0.64"	0.5"	0.021"	A$ 940.26
A	68514413139	0.035"	1/2 x 1/2"	1.04"	U50R	Shaft and Coupling	0.64"	0.5"	0.021"	A$ 940.26
A	68514413209	0.035"	5/16 x 5/16"	1.42"	U62R	Shaft and Coupling	0.84"	0.625"	0.019"	A$ 1030.68
A	68514451037	0.04"	3/8 x 3/8"	1.42"	U75R	Shaft and Coupling	0.84"	0.75"	0.028"	A$ 1241.64

LOVEJOY -

UFH Type with Keyway, Short Version, Inch Bores

Style	Model	Bore Size	Item	Price (inc. GST)
A	68514413872	3/4"	Flange To Shaft Coupling	A$ 1241.64
A	68514413870	5/8"	Shaft and Coupling	A$ 1241.64

LOVEJOY -

Uniflex Couplings UF Type, RRU Drop Out

Style	Model	Coupling Size	Dimension Bc	Dimension D	Dimension Fd	Dimension Fl1	Dimension Hd	Dimension S	Length	Price (inc. GST)
A	68514413923	UF50	1.5"	1.88"	2"	0.25"	2"	1.56"	1.56"	A$ 608.51
A	68514413952	UF150	4.38"	5"	5.38"	0.5"	3.75"	3.44"	3.44"	A$ 2941.38

LOVEJOY -

RRU Type Hubs without Keyway, Inch Bores

Style	Model	Bore Size	Coupling Size	Dimension Bc	Dimension D	Dimension Fd	Dimension Fl1	Dimension Hd	Dimension Hl	Price (inc. GST)
A	68514413740	3/8"	RRU75	2"	2.38"	2.5"	0.38"	2.5"	1.25"	A$ 390.98	RFQ
A	68514413695	7/16"	RRU50	1.5"	1.88"	2"	0.25"	2"	1"	A$ 308.58	RFQ

LOVEJOY -

U Type without Keyway, Short Version, Inch Bores

Style	Model	Axial Misalignment (Δ Ka)	Bore Dia.	Bore Size	Dimension Hd	Hub Size	Length Through Bore	Max. Bore	Max. Parallel Misalignment (in.)	Price (inc. GST)
A	68514441950	0.01"	0.5"	3/8 x 3/8"	1.04"	U50S	0.5"	0.5"	0.014"	A$ 747.49
A	68514413103	0.015"	0.375"	3/8 x 3/8"	0.86"	U37S	0.52"	0.375"	0.009"	A$ 886.03
A	68514444809	0.015"	0.375"	1/4 x 3/8"	0.86"	U37S	0.52"	0.375"	0.009"	A$ 886.03
A	68514413359	0.02"	0.75"	3/8 x 3/8"	1.42"	U75S	0.84"	0.75"	0.019"	A$ 1241.64
A	68514450849	0.02"	0.625"	5/16 x 5/16"	1.42"	U62S	0.62"	0.625"	0.019"	A$ 1030.68

LOVEJOY -

U Type with Keyway, Regular Version, Inch Bores

Style	Model	Axial Misalignment (Δ Ka)	Bore Size	Dimension Hd	Hub Size	Item	Keyway Size	Length Through Bore	Max. Bore	Price (inc. GST)
A	68514413255	0.035"	5/8 x 5/8"	1.42"	U62R	Shaft and Coupling	3/16 x 3/32"	0.84"	0.625"	A$ 1030.68
A	68514444307	0.035"	1/2 x 5/8"	1.42"	U62R	Shaft and Coupling	1/8 x 1/16 And 3/16 x 3/32"	0.84"	0.625"	A$ 1030.68
A	68514426105	0.04"	3/4 x 3/4"	2.11"	U100R	Shaft and Coupling	3/16 x 3/32"	1.29"	1"	A$ 1767.54
A	68514426099	0.04"	5/8 x 5/8"	1.42"	U75R	Shaft and Coupling	3/16 x 3/32"	0.84"	0.75"	A$ 1241.64
A	68514413461	0.04"	1 x 1"	2.11"	U100R	Shaft and Coupling	1/4 x 1/8"	1.29"	1"	A$ 1916.71
A	68514444108	0.04"	5/8 x 3/4"	1.42"	U75R	Shaft and Coupling	3/16 x 3/32"	0.84"	0.75"	A$ 1241.64
A	68514413409	0.04"	7/8 x 7/8"	1.73"	U87R	Shaft and Coupling	3/16 x 3/32"	0.84"	0.875"	A$ 1259.66
A	68514413351	0.04"	3/4 x 3/4"	1.42"	U75R	Shaft and Coupling	3/16 x 3/32"	0.84"	0.75"	A$ 1241.64
A	68514444219	0.04"	1 3/8 x 1 7/16"	2.98"	U150R	Shaft and Coupling	5/16 x 5/32 And 3/8 x 3/16"	1.88"	1.5"	A$ 3664.67
A	68514413541	0.04"	1 1/4 x 1 1/4"	2.17"	U125R	Flange To Shaft Coupling	1/4 x 1/8"	1.28"	1.25"	A$ 2145.75
A	68514448325	0.04"	3/4 x 3/4"	2.17"	U125R	Shaft and Coupling	3/16 x 3/32"	1.28"	1.25"	A$ 2145.75

HUB CITY -

Precision Splined Hubs

Style	Model	Price (inc. GST)
A	0332-00031	A$ 216.67	RFQ
B	0332-00033	A$ 189.59	RFQ
C	0332-00074	A$ 419.80	RFQ
D	0332-00073	A$ 311.43	RFQ
E	0332-00037	A$ 516.50	RFQ
F	0332-00093	A$ 311.43	RFQ

LOVEJOY -

U Type with Keyway, Short Version, Inch Bores

Style	Model	Axial Misalignment (Δ Ka)	Bore Size	Dimension Hd	Hub Size	Item	Keyway Size	Length Through Bore	Max. Bore	Price (inc. GST)
A	68514426098	0.01"	1/2 x 1/2"	1.04"	U50S	Flange To Shaft Coupling	1/8 x 1/16"	0.5"	0.5"	A$ 940.26
A	68514413493	0.02"	1 x 1"	2.11"	U100S	Shaft and Coupling	1/4 x 1/8"	1"	1"	A$ 1916.71
A	68514426100	0.02"	5/8 x 5/8"	1.42"	U75S	Shaft and Coupling	3/16 x 3/32"	0.84"	0.75"	A$ 1159.59
A	68514444113	0.02"	1 x 1"	2.17"	U125S	Shaft and Coupling	1/4 x 1/8"	1.1"	1.25"	A$ 2145.75
A	68514413300	0.02"	5/8 x 5/8"	1.42"	U62S	Shaft and Coupling	3/16 x 3/32"	0.62"	0.625"	A$ 1030.68
A	68514426104	0.02"	3/4 x 3/4"	1.73"	U87S	Shaft and Coupling	3/16 x 3/32"	0.84"	0.875"	A$ 1350.15
A	68514413570	0.02"	1 1/4 x 1 1/4"	2.17"	U125S	Flange To Shaft Coupling	1/4 x 1/8"	1.1"	1.25"	A$ 1973.71
A	68514413384	0.02"	3/4 x 3/4"	1.42"	U75S	Shaft and Coupling	3/16 x 3/32"	0.84"	0.75"	A$ 1159.59
A	68514426103	0.02"	5/8 x 5/8"	1.73"	U87S	Shaft and Coupling	3/16 x 3/32"	0.84"	0.875"	A$ 1350.15
A	68514413426	0.02"	7/8 x 7/8"	1.73"	U87S	Shaft and Coupling	3/16 x 3/32"	0.84"	0.875"	A$ 909.33	RFQ
A	68514445193	0.02"	5/8 x 5/8"	2.17"	U125S	Shaft and Coupling	3/16 x 3/32"	1.1"	1.25"	A$ 2145.75
A	68514445477	0.02"	1/2 x 5/8"	1.42"	U62S	Shaft and Coupling	1/8 x 1/16 And 3/16 x 3/32"	0.62"	0.625"	A$ 972.32
A	68514445717	0.02"	7/8 x 7/8"	2.54"	U137S	Shaft and Coupling	3/16 x 3/32"	1.01"	1.375"	A$ 3013.71
A	68514444584	0.02"	1 x 1 1/4"	2.17"	U125S	Shaft and Coupling	1/4 x 1/8"	1.1"	1.25"	A$ 2145.75
A	68514445248	0.02"	5/8 x 7/8"	1.73"	U87S	Shaft and Coupling	3/16 x 3/32"	0.84"	0.875"	A$ 1350.15
A	68514446309	0.02"	5/8 x 1"	2.11"	U100S	Shaft and Coupling	3/16 x 3/32 And 1/4 x 1/8"	1"	1"	A$ 1767.54
A	68514447442	0.02"	1/2 x 1/2"	1.42"	U62S	Shaft and Coupling	1/8 x 1/16"	0.62"	0.625"	A$ 1030.68

TB WOODS -

AX Series Closed Coupled Couplings

Style	Model	Coupling Size	Dimension A	Dimension B	Dimension F	Dimension H	Dimension J	Free End Float +/-	Inertia	Price (inc. GST)
A	AX30	30	5.63"	6.3"	1.88"	3.3"	3.18"	0.065"	51.7 lbs.-sq. ft.	A$ 23.23
A	AX35	35	6.63"	7.17"	2 1/4"	4.15"	2.81"	0.085"	108 lbs.-sq. ft.	A$ 25.81

TB WOODS -

TFI Form Flex Couplings

Style	Model	Angular Misalignment	Coupling Size	Dimension B	Dimension C	Dimension H	Max. Angular Misalignment	Max. Bore	Max. Bore O/s
A	TFI0038	0.5°	38	6.3"	1.77"	2.891"	-	2.19" , 58" , 76"	3"	RFQ
A	TFI0027	0.5°	27	5.91"	1.57"	2.143"	0.5° /disc pack	1.56" , 42" , 57"	2 1/4"	RFQ
A	TFI0140	0.5°	140	9.84"	2.95"	3.757"	-	2 3/4" , 75"	-	RFQ
A	TFI0260	0.5°	260	11.42"	3.35"	4.662"	0.5° /disc pack	3.44" , 95"	-	RFQ
A	TFI0400	0.5°	400	13.78"	4.13"	5.568"	-	116" , 4.19"	-	RFQ
A	TFI0750	0.5°	750	16.14"	4.72"	6.46"	-	132" , 4.63"	-	RFQ
A	TFI1310	0.5°	1310	19.29"	5.71"	7.76"	-	162" , 5.63"	-	RFQ
A	TFI6000	0.33°	6000	28.35"	9.06"	12.68"	-	265" , 9"	-	RFQ
A	TFI1900	0.33°	1900	19.69"	5.91"	9.17"	-	192" , 6 3/4"	-	RFQ
A	TFI2500	0.33°	2500	21.57"	6.46"	9.45"	0.33° /disc pack	197" , 6.88"	-	RFQ
A	TFI3300	0.33°	3300	23.78"	7.17"	10.63"	-	220" , 7.63"	-	RFQ
A	TFI8500	0.33°	8500	33.07"	10.24"	14.37"	0.33° /disc pack	10.63" , 302"	-	RFQ
A	TFI12000	0.33°	12000	36.38"	11.5"	16.02"	0.33° /disc pack	11.5" , 337"	-	RFQ

Stafford Mfg -

Signature Series, One Piece Split Precision Sleeve Couplings

Style	Model	Bore Size	Keyway Size	Outside Dia.	Screw Size	Total Length	Type	Price (inc. GST)
A	5L100100FKPSC	1"	1/4"	2"	1/4-28 x 3/4	3"	High Strength	A$ 320.45	RFQ
B	5L100100KPSC	1"	1/4"	2"	1/4-28 x 3/4	3"	High Strength	A$ 247.10	RFQ
A	5L108108FKPSC	1-1/2"	3/8"	2.500"	1/4-28 x 3/4	3.750"	High Strength	A$ 410.94	RFQ
B	5L108108KPSC	1-1/2"	3/8"	2.500"	1/4-28 x 3/4	3.750"	High Strength	A$ 360.93	RFQ
A	5L104104FKPSC	1-1/4"	1/4"	2.250"	1/4-28 x 3/4	3.375"	High Strength	-	RFQ
B	5L104104KPSC	1-1/4"	1/4"	2.250"	1/4-28 x 3/4	3.375"	High Strength	-	RFQ
B	5L008008KPSC	1/2"	1/8"	1.250"	8-32 x 1/2	1.875"	High Strength	A$ 201.86	RFQ
A	5L008008FKPSC	1/2"	1/8"	1.250"	8-32 x 1/2	1.875"	High Strength	A$ 268.19	RFQ
B	5L012012KPSC	3/4"	3/16"	1.750"	1/4-28 x 3/4	2.625"	High Strength	A$ 230.69	RFQ
A	5L012012FKPSC	3/4"	3/16"	1.750"	1/4-28 x 3/4	2.625"	High Strength	A$ 269.22	RFQ
A	5L010010FKPSC	5/8"	3/16"	1.500"	10-32 x 5/8	2.250"	High Strength	A$ 313.06	RFQ
B	5L010010KPSC	5/8"	3/16"	1.500"	10-32 x 5/8	2.250"	High Strength	A$ 244.54	RFQ
C	5LM012012KPSC	12 mm	4mm	28mm	M4 x 0.7 x 12 mm	45 mm	Precision Sleeve	A$ 180.03	RFQ
C	5LM014014KPSC	14 mm	5mm	30mm	M4 x 0.7 x 12 mm	50 mm	Precision Sleeve	A$ 194.72	RFQ
C	5LM015015KPSC	15 mm	5mm	34mm	M5 x 0.8 x 16 mm	50 mm	Precision Sleeve	A$ 200.51	RFQ
C	5LM016016KPSC	16 mm	5mm	34mm	M5 x 0.8 x 16 mm	50 mm	Precision Sleeve	A$ 186.30	RFQ
C	5LM018018KPSC	18 mm	6 mm	36mm	M5 x 0.8 x 16 mm	60 mm	Precision Sleeve	A$ 191.52	RFQ
C	5LM020020KPSC	20 mm	6 mm	40mm	M6 x 1.0 x 18 mm	65 mm	Precision Sleeve	A$ 271.52	RFQ
C	5LM025025KPSC	25 mm	8 mm	45mm	M6 x 1.0 x 18 mm	65 mm	Precision Sleeve	A$ 227.23	RFQ
C	5LM030030KPSC	30 mm	8 mm	54mm	M6 x 1.0 x 16 mm	75 mm	Precision Sleeve	-	RFQ
C	5LM035035KPSC	35 mm	10mm	57mm	M6 x 1.0 x 18 mm	80 mm	Precision Sleeve	-	RFQ
C	5LM040040KPSC	40 mm	12mm	60mm	M6 x 1.0 x 18 mm	90 mm	Precision Sleeve	A$ 483.14	RFQ
C	5LM045045KPSC	45 mm	14mm	73mm	M8 x 1.25 x 25 mm	105 mm	Precision Sleeve	-	RFQ

Stafford Mfg -

Solution Series, UPS Parallel Clamps

Style	Model	Bore Size	Bore Size A	Bore Size B	Outside Dia.	Total Length
A	UPS-A012008P	-	0.750"	0.500"	1.750"	2.500"	RFQ
A	UPS-A100012P	-	1"	0.750"	2"	3"	RFQ
A	UPS-A100008P	-	1"	0.500"	2"	3"	RFQ
A	UPS-A008008P	0.500"	-	-	1.375"	2"	RFQ
A	UPS-A012012P	0.750"	-	-	1.750"	2.500"	RFQ
A	UPS-A100100P	1"	-	-	2"	3"	RFQ

Stafford Mfg -

Solution Series, UPS Sliding Mounts

Style	Model	Inside Dia.	Outside Dia.	Total Length
A	UPS-A008SM	0.500"	1.375"	1.375"	RFQ
B	UPS-A008SMU	0.500"	1.625"	2.750"	RFQ
A	UPS-A012SM	0.750"	1.750"	1.750"	RFQ
B	UPS-A012SMU	0.750"	1.750"	3"	RFQ
A	UPS-A100SM	1"	2"	2.125"	RFQ
B	UPS-A100SMU	1"	2"	3.250"	RFQ

HUB CITY -

Involute Splined Couplings

Style	Model	Price (inc. GST)
A	0332-00028	A$ 154.74	RFQ
B	0332-00043	A$ 158.63	RFQ
C	0332-00030	A$ 344.35	RFQ
D	0332-00027	A$ 147.00	RFQ
E	0332-00350	A$ 164.43	RFQ

HUB CITY -

Involute Splined Shafts

Style	Model	Price (inc. GST)
A	0332-00025	A$ 317.25	RFQ
B	0332-00395	A$ 390.74	RFQ

HUB CITY -

Splined Shafts

Style	Model	Price (inc. GST)
A	0332-00026	A$ 419.80	RFQ
A	0332-00390	A$ 199.23	RFQ
B	0332-00394	A$ 154.74	RFQ
A	0332-00398	A$ 390.74	RFQ
A	0332-00038	A$ 833.86	RFQ
A	0332-00039	A$ 849.26	RFQ
A	0332-00397	A$ 599.88	RFQ
A	0332-00399	A$ 616.87	RFQ
A	0332-00391	A$ 282.91	RFQ
A	0332-00393	A$ 274.42	RFQ
A	0332-00023	A$ 251.00	RFQ

LOVEJOY -

Flange To Shaft Coupling, Size 3/4 x 3/16 Inch

Model	Item	Price (inc. GST)
68514413865	AK3XAF	A$ 1241.64

LOVEJOY -

Coupling Hub, 0.75 Inch Bore Size, With Keyway, Metallic

Model	Item	Price (inc. GST)
69790400057	AL9TJD	A$ 842.08

LOVEJOY -

Coupling Flange, 2.5 Inch Length Thru Bore

Model	Item	Price (inc. GST)
68514439197	AM2QBW	A$ 1184.86

LOVEJOY -

Clamp-On Beam Shaft Coupling, 19 mm OD, 23 mm Length, Anodized Aluminium

Model	Item	Price (inc. GST)
69790411830	AN7DUA	A$ 1748.62	See Details

123