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
88345005418	N/A QF5S303X7/8	N/A 7/8 in	N/A 5	N/A 3/16 x 3/32 in	N/A 1.08 in27.4 mm	N/A
88345005419	N/A QF5S303XPB	N/A Pilot in	N/A 5	N/A No Keyway in	N/A 1.08 in27.4 mm	N/A
88345028540	N/A QF5S303X1U	N/A 1 in	N/A 5	N/A 1/4x1/8 in	N/A 1.08 in27.4 mm	N/A
88345028541	N/A QF25X1-3/8U	N/A 1-3/8 in	N/A 25	N/A 5/16x5/32 in	N/A 1.81 in46 mm	N/A
88345028591	N/A QF15S303X1-7/16	N/A 1-7/16 in	N/A 15	N/A 3/8x3/16 in	N/A 1.34 in34 mm	N/A
88345031034	N/A QF50X1-3/16	N/A 1-3/16 in	N/A 50	N/A 1/4x1/8 in	N/A 2.16 in54.9 mm	N/A
88345031035	N/A QF50X1-3/4	N/A 1-3/4 in	N/A 50	N/A 3/8x3/16 in	N/A 2.16 in54.9 mm	N/A
88345031046	N/A QF25X1-3/16	N/A 1-3/16 in	N/A 25	N/A 1/4x1/8 in	N/A 1.81 in46 mm	N/A
88345031047	N/A QF100X2-1/8	N/A 2-1/8 in	N/A 100	N/A 1/2x1/4 in	N/A 2.46 in62.5 mm	N/A
88345031048	N/A QF100X1-15/16	N/A 1-15/16 in	N/A 100	N/A 1/2x1/4 in	N/A 2.46 in62.5 mm	N/A
88345032879	N/A QF15S303X1-3/16	N/A 1-3/16 in	N/A 15	N/A 1/4x1/8 in	N/A 1.34 in34 mm	N/A
88345032880	N/A QF15S303X5/8	N/A 5/8 in	N/A 15	N/A 3/16 x 3/32 in	N/A 1.34 in34 mm	N/A
88345032881	N/A QF15S303X1-5/8	N/A 1-5/8 in	N/A 15	N/A 3/8x3/16 in	N/A 1.34 in34 mm	N/A
88345032893	N/A QF50S303XPB	N/A Pilot 23/32 in	N/A 50	N/A No Keyway in	N/A 2.16 in54.9 mm	N/A
88345039974	N/A QF25S303X1-3/8	N/A 1-3/8 in	N/A 25	N/A 5/16x5/32 in	N/A 1.81 in46 mm	N/A
88345040983	N/A QF100X1-1/4	N/A 1-1/4 in	N/A 100	N/A 1/4x1/8 in	N/A 2.46 in62.5 mm	N/A
88345040984	N/A QF15S303X1-1/4E	N/A 1-1/4 in	N/A 15	N/A 5/16 x 5/32 in	N/A 1.34 in34 mm	N/A
88345040987	N/A QF175X3-1/2	N/A 3-1/2 in	N/A 175	N/A 7/8x7/16 in	N/A 2.67 in67.8 mm	N/A
88345040988	N/A QF175X3-3/8	N/A 3-3/8 in	N/A 175	N/A 7/8x7/16 in	N/A 2.67 in67.8 mm	N/A
88345040991	N/A QF250X3-15/16	N/A 3-15/16 in	N/A 250	N/A 1x1/2 in	N/A 3.1 in78.7 mm	N/A
88345040993	N/A QF25S303X1-1/4	N/A 1-1/4 in	N/A 25	N/A 1/4x1/8 in	N/A 1.81 in46 mm	N/A
88345040994	N/A QF25S303X1-1/8	N/A 1-1/8 in	N/A 25	N/A 1/4x1/8 in	N/A 1.81 in46 mm	N/A
88345040995	N/A QF25X1-1/4E	N/A 1-1/4 in	N/A 25	N/A 5/16x5/32 in	N/A 1.81 in46 mm	N/A
88345040996	N/A QF25X1-3/4E	N/A 1-3/4 in	N/A 25	N/A 1/2x1/4 in	N/A 1.81 in46 mm	N/A
88345040997	N/A QF25X2-1/4	N/A 2-1/4 in	N/A 25	N/A 1/2x1/4 in	N/A 1.81 in46 mm	N/A

88345005418

N/A QF5S303X7/8

N/A 7/8 in

N/A 5

N/A 3/16 x 3/32 in

N/A 1.08 in27.4 mm

N/A

88345005419

N/A QF5S303XPB

N/A Pilot in

N/A 5

N/A No Keyway in

N/A 1.08 in27.4 mm

N/A

88345028540

N/A QF5S303X1U

N/A 1 in

N/A 5

N/A 1/4x1/8 in

N/A 1.08 in27.4 mm

N/A

88345028541

N/A QF25X1-3/8U

N/A 1-3/8 in

N/A 25

N/A 5/16x5/32 in

N/A 1.81 in46 mm

N/A

88345028591

N/A QF15S303X1-7/16

N/A 1-7/16 in

N/A 15

N/A 3/8x3/16 in

N/A 1.34 in34 mm

N/A

88345031034

N/A QF50X1-3/16

N/A 1-3/16 in

N/A 50

N/A 1/4x1/8 in

N/A 2.16 in54.9 mm

N/A

88345031035

N/A QF50X1-3/4

N/A 1-3/4 in

N/A 50

N/A 3/8x3/16 in

N/A 2.16 in54.9 mm

N/A

88345031046

N/A QF25X1-3/16

N/A 1-3/16 in

N/A 25

N/A 1/4x1/8 in

N/A 1.81 in46 mm

N/A

88345031047

N/A QF100X2-1/8

N/A 2-1/8 in

N/A 100

N/A 1/2x1/4 in

N/A 2.46 in62.5 mm

N/A

88345031048

N/A QF100X1-15/16

N/A 1-15/16 in

N/A 100

N/A 1/2x1/4 in

N/A 2.46 in62.5 mm

N/A

88345032879

N/A QF15S303X1-3/16

N/A 1-3/16 in

N/A 15

N/A 1/4x1/8 in

N/A 1.34 in34 mm

N/A

88345032880

N/A QF15S303X5/8

N/A 5/8 in

N/A 15

N/A 3/16 x 3/32 in

N/A 1.34 in34 mm

N/A

88345032881

N/A QF15S303X1-5/8

N/A 1-5/8 in

N/A 15

N/A 3/8x3/16 in

N/A 1.34 in34 mm

N/A

88345032893

N/A QF50S303XPB

N/A Pilot 23/32 in

N/A 50

N/A No Keyway in

N/A 2.16 in54.9 mm

N/A

88345039974

N/A QF25S303X1-3/8

N/A 1-3/8 in

N/A 25

N/A 5/16x5/32 in

N/A 1.81 in46 mm

N/A

88345040983

N/A QF100X1-1/4

N/A 1-1/4 in

N/A 100

N/A 1/4x1/8 in

N/A 2.46 in62.5 mm

N/A

88345040984

N/A QF15S303X1-1/4E

N/A 1-1/4 in

N/A 15

N/A 5/16 x 5/32 in

N/A 1.34 in34 mm

N/A

88345040987

N/A QF175X3-1/2

N/A 3-1/2 in

N/A 175

N/A 7/8x7/16 in

N/A 2.67 in67.8 mm

N/A

88345040988

N/A QF175X3-3/8

N/A 3-3/8 in

N/A 175

N/A 7/8x7/16 in

N/A 2.67 in67.8 mm

N/A

88345040991

N/A QF250X3-15/16

N/A 3-15/16 in

N/A 250

N/A 1x1/2 in

N/A 3.1 in78.7 mm

N/A

88345040993

N/A QF25S303X1-1/4

N/A 1-1/4 in

N/A 25

N/A 1/4x1/8 in

N/A 1.81 in46 mm

N/A

88345040994

N/A QF25S303X1-1/8

N/A 1-1/8 in

N/A 25

N/A 1/4x1/8 in

N/A 1.81 in46 mm

N/A

88345040995

N/A QF25X1-1/4E

N/A 1-1/4 in

N/A 25

N/A 5/16x5/32 in

N/A 1.81 in46 mm

N/A

88345040996

N/A QF25X1-3/4E

N/A 1-3/4 in

N/A 25

N/A 1/2x1/4 in

N/A 1.81 in46 mm

N/A

88345040997

N/A QF25X2-1/4

N/A 2-1/4 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