QUICK FLEX Standard Hubs with Keyway - Inch (Imperial) Bores On The Timken Company

Part Number	Description	Bore Size	Coupling Size	Keyway Size (W x D)	Length thru Bore	CAD
88345043038	N/A QF250X2-5/8	N/A 2-5/8 in	N/A 250	N/A 5/8x5/16 in	N/A 3.1 in78.7 mm	N/A
88345043039	N/A QF250X2-7/8	N/A 2-7/8 in	N/A 250	N/A 3/4x3/8 in	N/A 3.1 in78.7 mm	N/A
88345043040	N/A QF250X3-1/2	N/A 3-1/2 in	N/A 250	N/A 7/8x7/16 in	N/A 3.1 in78.7 mm	N/A
88345043041	N/A QF250X3-1/2U	N/A 3-1/2 in	N/A 250	N/A 7/8x7/16 in	N/A 3.1 in78.7 mm	N/A
88345043042	N/A QF250X3-1/4	N/A 3-1/4 in	N/A 250	N/A 3/4x3/8 in	N/A 3.1 in78.7 mm	N/A
88345043043	N/A QF250X3-1/4U	N/A 3-1/4 in	N/A 250	N/A 3/4x3/8 in	N/A 3.1 in78.7 mm	N/A
88345043044	N/A QF250X3-11/16	N/A 3-11/16 in	N/A 250	N/A 7/8x7/16 in	N/A 3.1 in78.7 mm	N/A
88345043045	N/A QF250X3-3/4	N/A 3-3/4 in	N/A 250	N/A 7/8x7/16 in	N/A 3.1 in78.7 mm	N/A
88345043046	N/A QF250X3-3/4U	N/A 3-3/4 in	N/A 250	N/A 7/8x7/16 in	N/A 3.1 in78.7 mm	N/A
88345043047	N/A QF250X3-3/8U	N/A 3-3/8 in	N/A 250	N/A 7/8x7/16 in	N/A 3.1 in78.7 mm	N/A
88345043048	N/A QF250X3-5/8	N/A 3-5/8 in	N/A 250	N/A 7/8x7/16 in	N/A 3.1 in78.7 mm	N/A
88345043049	N/A QF250X3-5/8U	N/A 3-5/8 in	N/A 250	N/A 7/8x7/16 in	N/A 3.1 in78.7 mm	N/A
88345043050	N/A QF250X3-7/16	N/A 3-7/16 in	N/A 250	N/A 7/8x7/16 in	N/A 3.1 in78.7 mm	N/A
88345043051	N/A QF250X3-9/16U	N/A 3-9/16 in	N/A 250	N/A 7/8x7/16 in	N/A 3.1 in78.7 mm	N/A
88345043052	N/A QF250X4-1/8	N/A 4-1/8 in	N/A 250	N/A 1x1/2 in	N/A 3.1 in78.7 mm	N/A
88345043053	N/A QF250X4-1/8U	N/A 4-1/8 in	N/A 250	N/A 1x1/2 in	N/A 3.1 in78.7 mm	N/A
88345043065	N/A QF25S303X1	N/A 1 in	N/A 25	N/A 1/4x1/8 in	N/A 1.81 in46 mm	N/A
88345043066	N/A QF25S303X1-1/4E	N/A 1-1/4 in	N/A 25	N/A 5/16x5/32 in	N/A 1.81 in46 mm	N/A
88345043067	N/A QF25S303X1-1/4U	N/A 1-1/4 in	N/A 25	N/A 1/4x1/8 in	N/A 1.81 in46 mm	N/A
88345043069	N/A QF25S303X1-3/16	N/A 1-3/16 in	N/A 25	N/A 1/4x1/8 in	N/A 1.81 in46 mm	N/A
88345043070	N/A QF25S303X1-3/4	N/A 1-3/4 in	N/A 25	N/A 3/8x3/16 in	N/A 1.81 in46 mm	N/A
88345043071	N/A QF25S303X1-5/8U	N/A 1-5/8 in	N/A 25	N/A 3/8x3/16 in	N/A 1.81 in46 mm	N/A
88345043072	N/A QF25S303X1-7/16	N/A 1-7/16 in	N/A 25	N/A 3/8x3/16 in	N/A 1.81 in46 mm	N/A
88345043073	N/A QF25S303X1-7/8	N/A 1-7/8 in	N/A 25	N/A 1/2x1/4 in	N/A 1.81 in46 mm	N/A
88345043074	N/A QF25S303X2	N/A 2 in	N/A 25	N/A 1/2x1/4 in	N/A 1.81 in46 mm	N/A

88345043038

N/A QF250X2-5/8

N/A 2-5/8 in

N/A 250

N/A 5/8x5/16 in

N/A 3.1 in78.7 mm

N/A

88345043039

N/A QF250X2-7/8

N/A 2-7/8 in

N/A 250

N/A 3/4x3/8 in

N/A 3.1 in78.7 mm

N/A

88345043040

N/A QF250X3-1/2

N/A 3-1/2 in

N/A 250

N/A 7/8x7/16 in

N/A 3.1 in78.7 mm

N/A

88345043041

N/A QF250X3-1/2U

N/A 3-1/2 in

N/A 250

N/A 7/8x7/16 in

N/A 3.1 in78.7 mm

N/A

88345043042

N/A QF250X3-1/4

N/A 3-1/4 in

N/A 250

N/A 3/4x3/8 in

N/A 3.1 in78.7 mm

N/A

88345043043

N/A QF250X3-1/4U

N/A 3-1/4 in

N/A 250

N/A 3/4x3/8 in

N/A 3.1 in78.7 mm

N/A

88345043044

N/A QF250X3-11/16

N/A 3-11/16 in

N/A 250

N/A 7/8x7/16 in

N/A 3.1 in78.7 mm

N/A

88345043045

N/A QF250X3-3/4

N/A 3-3/4 in

N/A 250

N/A 7/8x7/16 in

N/A 3.1 in78.7 mm

N/A

88345043046

N/A QF250X3-3/4U

N/A 3-3/4 in

N/A 250

N/A 7/8x7/16 in

N/A 3.1 in78.7 mm

N/A

88345043047

N/A QF250X3-3/8U

N/A 3-3/8 in

N/A 250

N/A 7/8x7/16 in

N/A 3.1 in78.7 mm

N/A

88345043048

N/A QF250X3-5/8

N/A 3-5/8 in

N/A 250

N/A 7/8x7/16 in

N/A 3.1 in78.7 mm

N/A

88345043049

N/A QF250X3-5/8U

N/A 3-5/8 in

N/A 250

N/A 7/8x7/16 in

N/A 3.1 in78.7 mm

N/A

88345043050

N/A QF250X3-7/16

N/A 3-7/16 in

N/A 250

N/A 7/8x7/16 in

N/A 3.1 in78.7 mm

N/A

88345043051

N/A QF250X3-9/16U

N/A 3-9/16 in

N/A 250

N/A 7/8x7/16 in

N/A 3.1 in78.7 mm

N/A

88345043052

N/A QF250X4-1/8

N/A 4-1/8 in

N/A 250

N/A 1x1/2 in

N/A 3.1 in78.7 mm

N/A

88345043053

N/A QF250X4-1/8U

N/A 4-1/8 in

N/A 250

N/A 1x1/2 in

N/A 3.1 in78.7 mm

N/A

88345043065

N/A QF25S303X1

N/A 1 in

N/A 25

N/A 1/4x1/8 in

N/A 1.81 in46 mm

N/A

88345043066

N/A QF25S303X1-1/4E

N/A 1-1/4 in

N/A 25

N/A 5/16x5/32 in

N/A 1.81 in46 mm

N/A

88345043067

N/A QF25S303X1-1/4U

N/A 1-1/4 in

N/A 25

N/A 1/4x1/8 in

N/A 1.81 in46 mm

N/A

88345043069

N/A QF25S303X1-3/16

N/A 1-3/16 in

N/A 25

N/A 1/4x1/8 in

N/A 1.81 in46 mm

N/A

88345043070

N/A QF25S303X1-3/4

N/A 1-3/4 in

N/A 25

N/A 3/8x3/16 in

N/A 1.81 in46 mm

N/A

88345043071

N/A QF25S303X1-5/8U

N/A 1-5/8 in

N/A 25

N/A 3/8x3/16 in

N/A 1.81 in46 mm

N/A

88345043072

N/A QF25S303X1-7/16

N/A 1-7/16 in

N/A 25

N/A 3/8x3/16 in

N/A 1.81 in46 mm

N/A

88345043073

N/A QF25S303X1-7/8

N/A 1-7/8 in

N/A 25

N/A 1/2x1/4 in

N/A 1.81 in46 mm

N/A

88345043074

N/A QF25S303X2

N/A 2 in

N/A 25

N/A 1/2x1/4 in

N/A 1.81 in46 mm

N/A

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Phone Number

No Preference
1
1/2
11/16
1-1/16
1-1/2
1-1/4
1-1/8
1-11/16
1-15/16
13/16
1-3/16
1-3/4
1-3/8
15/16
1-5/16
1-5/32
1-5/8
1-7/16
1-7/8
1-9/16
2
2-1/16
2-1/2
2-1/4
2-1/8
2-11/16
2-13/16
2-15/16
2-3/16
2-3/4
2-3/8
2-5/16
2-5/8
2-7/16
2-7/8
2-9/16
3
3/4
3/8
3-1/16
3-1/2
3-1/4
3-1/8
3-11/16
3-15/16
3-3/16
3-3/4
3-3/8
3-5/16
3-5/8
3-7/16
3-7/8
3-9/16
4
4-1/4
4-1/8
5/8
7/8
9/16
Pilot
Pilot 1 1/2"
Pilot 1"
Pilot 15/16
Pilot 17/32
Pilot 23/32
Pilot 5/8
Solid

No Preference
1/2 x 1/4
1/2 x1/4
1/2x1/4
1/4 x 1/8
1/4x1/8
1/8 x 1/16
1/8x1/16
1/x1/2
1x1/2
3/16 x 3/32
3/16x3/32
3/32 x 3/64
3/4x3/8
3/8 x 3/16
3/8x3/16
5/16 x 5/32
5/16x5/32
5/8x5/16
7/8x7/16
No Keyway

Bore Size (in)

Coupling Size

Keyway Size (in)

Part Number

Description

Bore Size

Coupling Size

Keyway Size (W x D)

Length thru Bore

CAD