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
88345043689	N/A QF25X3/4U	N/A 3/4 in	N/A 25	N/A 3/16x3/32 in	N/A 1.81 in46 mm	N/A
88345095987	N/A QF25X5/8	N/A 5/8 in	N/A 25	N/A 3/16x3/32 in	N/A 1.81 in46 mm	N/A
88345043081	N/A QF25S303X7/8	N/A 7/8 in	N/A 25	N/A 3/16x3/32 in	N/A 1.81 in46 mm	N/A
88345044273	N/A QF25S303X7/8E	N/A 7/8 in	N/A 25	N/A 1/4x1/8 in	N/A 1.81 in46 mm	N/A
88345044274	N/A QF25S303X7/8U	N/A 7/8 in	N/A 25	N/A 3/16x3/32 in	N/A 1.81 in46 mm	N/A
88345005330	N/A QF25X7/8	N/A 7/8 in	N/A 25	N/A 3/16x3/32 in	N/A 1.81 in46 mm	N/A
88345043113	N/A QF25X7/8E	N/A 7/8 in	N/A 25	N/A 1/4x1/8 in	N/A 1.81 in46 mm	N/A
88345043690	N/A QF25X7/8U	N/A 7/8 in	N/A 25	N/A 3/16x3/32 in	N/A 1.81 in46 mm	N/A
88345044276	N/A QF25X11/16	N/A 11/16 in	N/A 25	N/A 3/16x3/32 in	N/A 1.81 in46 mm	N/A
88345044280	N/A QF25X15/16	N/A 15/16 in	N/A 25	N/A 1/4x1/8 in	N/A 1.81 in46 mm	N/A
88345044282	N/A QF25X15/16U	N/A 15/16 in	N/A 25	N/A 1/4x1/8 in	N/A 1.81 in46 mm	N/A
88345005296	N/A QF25S303XPB	N/A Pilot 5/8 in	N/A 25	N/A No Keyway in	N/A 1.81 in46 mm	N/A
88345005332	N/A QF25XPB	N/A Pilot 5/8 in	N/A 25	N/A No Keyway in	N/A 1.81 in46 mm	N/A
88345005380	N/A QF50X1	N/A 1 in	N/A 50	N/A 1/4x1/8 in	N/A 2.16 in54.9 mm	N/A
88345043709	N/A QF50X1U	N/A 1 in	N/A 50	N/A 1/4x1/8 in	N/A 2.16 in54.9 mm	N/A
88345095893	N/A QF50S303X2	N/A 2 in	N/A 50	N/A 1/2x1/4 in	N/A 2.16 in54.9 mm	N/A
88345043253	N/A QF50S316X2U	N/A 2 in	N/A 50	N/A 1/2x1/4 in	N/A 2.16 in54.9 mm	N/A
88345005389	N/A QF50X2	N/A 2 in	N/A 50	N/A 1/2x1/4 in	N/A 2.16 in54.9 mm	N/A
88345043191	N/A QF50X2U	N/A 2 in	N/A 50	N/A 1/2x1/4 in	N/A 2.16 in54.9 mm	N/A
88345044455	N/A QF50X2UEXT	N/A 2 in	N/A 50	N/A 1/2x1/4 in	N/A 2.16 in54.9 mm	N/A
88345041075	N/A QF50S303X1-1/2	N/A 1-1/2 in	N/A 50	N/A 3/8x3/16 in	N/A 2.16 in54.9 mm	N/A
88345005381	N/A QF50X1-1/2	N/A 1-1/2 in	N/A 50	N/A 3/8x3/16 in	N/A 2.16 in54.9 mm	N/A
88345044429	N/A QF50X1-1/2NK	N/A 1-1/2 in	N/A 50	N/A 3/8x3/16 in	N/A 2.16 in54.9 mm	N/A
88345044430	N/A QF50X1-1/2SH	N/A 1-1/2 in	N/A 50	N/A 3/8x3/16 in	N/A 2.16 in54.9 mm	N/A
88345043176	N/A QF50X1-1/2U	N/A 1-1/2 in	N/A 50	N/A 3/8x3/16 in	N/A 2.16 in54.9 mm	N/A

88345043689

N/A QF25X3/4U

N/A 3/4 in

N/A 25

N/A 3/16x3/32 in

N/A 1.81 in46 mm

N/A

88345095987

N/A QF25X5/8

N/A 5/8 in

N/A 25

N/A 3/16x3/32 in

N/A 1.81 in46 mm

N/A

88345043081

N/A QF25S303X7/8

N/A 7/8 in

N/A 25

N/A 3/16x3/32 in

N/A 1.81 in46 mm

N/A

88345044273

N/A QF25S303X7/8E

N/A 7/8 in

N/A 25

N/A 1/4x1/8 in

N/A 1.81 in46 mm

N/A

88345044274

N/A QF25S303X7/8U

N/A 7/8 in

N/A 25

N/A 3/16x3/32 in

N/A 1.81 in46 mm

N/A

88345005330

N/A QF25X7/8

N/A 7/8 in

N/A 25

N/A 3/16x3/32 in

N/A 1.81 in46 mm

N/A

88345043113

N/A QF25X7/8E

N/A 7/8 in

N/A 25

N/A 1/4x1/8 in

N/A 1.81 in46 mm

N/A

88345043690

N/A QF25X7/8U

N/A 7/8 in

N/A 25

N/A 3/16x3/32 in

N/A 1.81 in46 mm

N/A

88345044276

N/A QF25X11/16

N/A 11/16 in

N/A 25

N/A 3/16x3/32 in

N/A 1.81 in46 mm

N/A

88345044280

N/A QF25X15/16

N/A 15/16 in

N/A 25

N/A 1/4x1/8 in

N/A 1.81 in46 mm

N/A

88345044282

N/A QF25X15/16U

N/A 15/16 in

N/A 25

N/A 1/4x1/8 in

N/A 1.81 in46 mm

N/A

88345005296

N/A QF25S303XPB

N/A Pilot 5/8 in

N/A 25

N/A No Keyway in

N/A 1.81 in46 mm

N/A

88345005332

N/A QF25XPB

N/A Pilot 5/8 in

N/A 25

N/A No Keyway in

N/A 1.81 in46 mm

N/A

88345005380

N/A QF50X1

N/A 1 in

N/A 50

N/A 1/4x1/8 in

N/A 2.16 in54.9 mm

N/A

88345043709

N/A QF50X1U

N/A 1 in

N/A 50

N/A 1/4x1/8 in

N/A 2.16 in54.9 mm

N/A

88345095893

N/A QF50S303X2

N/A 2 in

N/A 50

N/A 1/2x1/4 in

N/A 2.16 in54.9 mm

N/A

88345043253

N/A QF50S316X2U

N/A 2 in

N/A 50

N/A 1/2x1/4 in

N/A 2.16 in54.9 mm

N/A

88345005389

N/A QF50X2

N/A 2 in

N/A 50

N/A 1/2x1/4 in

N/A 2.16 in54.9 mm

N/A

88345043191

N/A QF50X2U

N/A 2 in

N/A 50

N/A 1/2x1/4 in

N/A 2.16 in54.9 mm

N/A

88345044455

N/A QF50X2UEXT

N/A 2 in

N/A 50

N/A 1/2x1/4 in

N/A 2.16 in54.9 mm

N/A

88345041075

N/A QF50S303X1-1/2

N/A 1-1/2 in

N/A 50

N/A 3/8x3/16 in

N/A 2.16 in54.9 mm

N/A

88345005381

N/A QF50X1-1/2

N/A 1-1/2 in

N/A 50

N/A 3/8x3/16 in

N/A 2.16 in54.9 mm

N/A

88345044429

N/A QF50X1-1/2NK

N/A 1-1/2 in

N/A 50

N/A 3/8x3/16 in

N/A 2.16 in54.9 mm

N/A

88345044430

N/A QF50X1-1/2SH

N/A 1-1/2 in

N/A 50

N/A 3/8x3/16 in

N/A 2.16 in54.9 mm

N/A

88345043176

N/A QF50X1-1/2U

N/A 1-1/2 in

N/A 50

N/A 3/8x3/16 in

N/A 2.16 in54.9 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