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
88345044049	N/A QF15S303X1-1/8U	N/A 1-1/8 in	N/A 15	N/A 1/4x1/8 in	N/A 1.34 in34 mm	N/A
88345044050	N/A QF15S303X15/16	N/A 15/16 in	N/A 15	N/A 1/4 x 1/8 in	N/A 1.34 in34 mm	N/A
88345044052	N/A QF15S303X1-7/16U	N/A 1-7/16 in	N/A 15	N/A 3/8x3/16 in	N/A 1.34 in34 mm	N/A
88345044053	N/A QF15S303X1-9/16	N/A 1-9/16 in	N/A 15	N/A 3/8x3/16 in	N/A 1.34 in34 mm	N/A
88345044054	N/A QF15S303X1E	N/A 1 in	N/A 15	N/A 5/16 x 5/32 in	N/A 1.34 in34 mm	N/A
88345044059	N/A QF15S304X1	N/A 1 in	N/A 15	N/A 1/4 x 1/8 in	N/A 1.34 in34 mm	N/A
88345044062	N/A QF15X1-1/16	N/A 1-1/16 in	N/A 15	N/A 1/4x1/8 in	N/A 1.34 in34 mm	N/A
88345044063	N/A QF15X1-1/4SH	N/A 1-1/4 in	N/A 15	N/A 1/4 x 1/8 in	N/A 1.34 in34 mm	N/A
88345044066	N/A QF15X1-3/8EU	N/A 1-3/8 in	N/A 15	N/A 5/16 x 5/32 in	N/A 1.34 in34 mm	N/A
88345044070	N/A QF15X1-5/32	N/A 1-5/32 in	N/A 15	N/A 1/4x1/8 in	N/A 1.34 in34 mm	N/A
88345044071	N/A QF15X1-5/8E	N/A 1-5/8 in	N/A 15	N/A 1/2 x 1/4 in	N/A 1.34 in34 mm	N/A
88345044077	N/A QF15X1-9/16	N/A 1-9/16 in	N/A 15	N/A 3/8x3/16 in	N/A 1.34 in34 mm	N/A
88345044078	N/A QF15X2	N/A 2 in	N/A 15	N/A 1/2x1/4 in	N/A 1.34 in34 mm	N/A
88345044083	N/A QF15X3/4NK	N/A 3/4 in	N/A 15	N/A No Keyway in	N/A 1.34 in34 mm	N/A
88345044087	N/A QF175S303X1-5/8	N/A 1-5/8 in	N/A 175	N/A 3/8x3/16 in	N/A 2.67 in67.8 mm	N/A
88345044090	N/A QF175S303X2-3/4	N/A 2-3/4 in	N/A 175	N/A 5/8x5/16 in	N/A 2.67 in67.8 mm	N/A
88345044091	N/A QF175S303X2-7/16	N/A 2-7/16 in	N/A 175	N/A 5/8x5/16 in	N/A 2.67 in67.8 mm	N/A
88345044092	N/A QF175S303X2-7/8	N/A 2-7/8 in	N/A 175	N/A 3/4x3/8 in	N/A 2.67 in67.8 mm	N/A
88345044093	N/A QF175S303X3	N/A 3 in	N/A 175	N/A 3/4x3/8 in	N/A 2.67 in67.8 mm	N/A
88345044094	N/A QF175S303X3-1/2	N/A 3-1/2 in	N/A 175	N/A 7/8x7/16 in	N/A 2.67 in67.8 mm	N/A
88345044095	N/A QF175S303X3-1/4	N/A 3-1/4 in	N/A 175	N/A 3/4x3/8 in	N/A 2.67 in67.8 mm	N/A
88345044096	N/A QF175S303X3-1/8	N/A 3-1/8 in	N/A 175	N/A 3/4x3/8 in	N/A 2.67 in67.8 mm	N/A
88345044097	N/A QF175S303X3-15/16	N/A 3-15/16 in	N/A 175	N/A 1x1/2 in	N/A 2.67 in67.8 mm	N/A
88345044098	N/A QF175S303X3-3/4	N/A 3-3/4 in	N/A 175	N/A 7/8x7/16 in	N/A 2.67 in67.8 mm	N/A
88345044099	N/A QF175S303X3-3/8	N/A 3-3/8 in	N/A 175	N/A 7/8x7/16 in	N/A 2.67 in67.8 mm	N/A

88345044049

N/A QF15S303X1-1/8U

N/A 1-1/8 in

N/A 15

N/A 1/4x1/8 in

N/A 1.34 in34 mm

N/A

88345044050

N/A QF15S303X15/16

N/A 15/16 in

N/A 15

N/A 1/4 x 1/8 in

N/A 1.34 in34 mm

N/A

88345044052

N/A QF15S303X1-7/16U

N/A 1-7/16 in

N/A 15

N/A 3/8x3/16 in

N/A 1.34 in34 mm

N/A

88345044053

N/A QF15S303X1-9/16

N/A 1-9/16 in

N/A 15

N/A 3/8x3/16 in

N/A 1.34 in34 mm

N/A

88345044054

N/A QF15S303X1E

N/A 1 in

N/A 15

N/A 5/16 x 5/32 in

N/A 1.34 in34 mm

N/A

88345044059

N/A QF15S304X1

N/A 1 in

N/A 15

N/A 1/4 x 1/8 in

N/A 1.34 in34 mm

N/A

88345044062

N/A QF15X1-1/16

N/A 1-1/16 in

N/A 15

N/A 1/4x1/8 in

N/A 1.34 in34 mm

N/A

88345044063

N/A QF15X1-1/4SH

N/A 1-1/4 in

N/A 15

N/A 1/4 x 1/8 in

N/A 1.34 in34 mm

N/A

88345044066

N/A QF15X1-3/8EU

N/A 1-3/8 in

N/A 15

N/A 5/16 x 5/32 in

N/A 1.34 in34 mm

N/A

88345044070

N/A QF15X1-5/32

N/A 1-5/32 in

N/A 15

N/A 1/4x1/8 in

N/A 1.34 in34 mm

N/A

88345044071

N/A QF15X1-5/8E

N/A 1-5/8 in

N/A 15

N/A 1/2 x 1/4 in

N/A 1.34 in34 mm

N/A

88345044077

N/A QF15X1-9/16

N/A 1-9/16 in

N/A 15

N/A 3/8x3/16 in

N/A 1.34 in34 mm

N/A

88345044078

N/A QF15X2

N/A 2 in

N/A 15

N/A 1/2x1/4 in

N/A 1.34 in34 mm

N/A

88345044083

N/A QF15X3/4NK

N/A 3/4 in

N/A 15

N/A No Keyway in

N/A 1.34 in34 mm

N/A

88345044087

N/A QF175S303X1-5/8

N/A 1-5/8 in

N/A 175

N/A 3/8x3/16 in

N/A 2.67 in67.8 mm

N/A

88345044090

N/A QF175S303X2-3/4

N/A 2-3/4 in

N/A 175

N/A 5/8x5/16 in

N/A 2.67 in67.8 mm

N/A

88345044091

N/A QF175S303X2-7/16

N/A 2-7/16 in

N/A 175

N/A 5/8x5/16 in

N/A 2.67 in67.8 mm

N/A

88345044092

N/A QF175S303X2-7/8

N/A 2-7/8 in

N/A 175

N/A 3/4x3/8 in

N/A 2.67 in67.8 mm

N/A

88345044093

N/A QF175S303X3

N/A 3 in

N/A 175

N/A 3/4x3/8 in

N/A 2.67 in67.8 mm

N/A

88345044094

N/A QF175S303X3-1/2

N/A 3-1/2 in

N/A 175

N/A 7/8x7/16 in

N/A 2.67 in67.8 mm

N/A

88345044095

N/A QF175S303X3-1/4

N/A 3-1/4 in

N/A 175

N/A 3/4x3/8 in

N/A 2.67 in67.8 mm

N/A

88345044096

N/A QF175S303X3-1/8

N/A 3-1/8 in

N/A 175

N/A 3/4x3/8 in

N/A 2.67 in67.8 mm

N/A

88345044097

N/A QF175S303X3-15/16

N/A 3-15/16 in

N/A 175

N/A 1x1/2 in

N/A 2.67 in67.8 mm

N/A

88345044098

N/A QF175S303X3-3/4

N/A 3-3/4 in

N/A 175

N/A 7/8x7/16 in

N/A 2.67 in67.8 mm

N/A

88345044099

N/A QF175S303X3-3/8

N/A 3-3/8 in

N/A 175

N/A 7/8x7/16 in

N/A 2.67 in67.8 mm

N/A

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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