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
88345044440	N/A QF50X2-1/16SH	N/A 2-1/16 in	N/A 50	N/A 1/2x1/4 in	N/A 2.16 in54.9 mm	N/A
88345044439	N/A QF50X1-9/16	N/A 1-9/16 in	N/A 50	N/A 3/8x3/16 in	N/A 2.16 in54.9 mm	N/A
88345044438	N/A QF50X1-5/16	N/A 1-5/16 in	N/A 50	N/A 5/16x5/32 in	N/A 2.16 in54.9 mm	N/A
88345044437	N/A QF50X15/16	N/A 15/16 in	N/A 50	N/A 1/4x1/8 in	N/A 2.16 in54.9 mm	N/A
88345044436	N/A QF50X1-3/8EU	N/A 1-3/8 in	N/A 50	N/A 5/16x5/32 in	N/A 2.16 in54.9 mm	N/A
88345044435	N/A QF50X1-3/8E	N/A 1-3/8 in	N/A 50	N/A 3/8x3/16 in	N/A 2.16 in54.9 mm	N/A
88345044434	N/A QF50X1-3/4EU	N/A 1-3/4 in	N/A 50	N/A 3/8x3/16 in	N/A 2.16 in54.9 mm	N/A
88345044433	N/A QF50X1-11/16	N/A 1-11/16 in	N/A 50	N/A 3/8x3/16 in	N/A 2.16 in54.9 mm	N/A
88345044432	N/A QF50X1-1/8SH	N/A 1-1/8 in	N/A 50	N/A 1/4x1/8 in	N/A 2.16 in54.9 mm	N/A
88345044431	N/A QF50X1-1/4SH	N/A 1-1/4 in	N/A 50	N/A 1/4x1/8 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
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
88345044424	N/A QF50S303X2-3/8E	N/A 2-3/8 in	N/A 50	N/A 3/4x3/8 in	N/A 2.16 in54.9 mm	N/A
88345044421	N/A QF50S303X1-3/4E	N/A 1-3/4 in	N/A 50	N/A 1/2x1/4 in	N/A 2.16 in54.9 mm	N/A
88345044419	N/A QF50S303X1-15/16	N/A 1-15/16 in	N/A 50	N/A 1/2x1/4 in	N/A 2.16 in54.9 mm	N/A
88345044418	N/A QF50S303X1-1/4E	N/A 1-1/4 in	N/A 50	N/A 5/16x5/32 in	N/A 2.16 in54.9 mm	N/A
88345044294	N/A QF25X3/4E	N/A 3/4 in	N/A 25	N/A 1/4x1/8 in	N/A 1.81 in46 mm	N/A
88345044286	N/A QF25X2-1/16	N/A 2-1/16 in	N/A 25	N/A 1/2x1/4 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
88345044281	N/A QF25X1-5/16	N/A 1-5/16 in	N/A 25	N/A 5/16x5/32 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
88345044278	N/A QF25X1-11/16U	N/A 1-11/16 in	N/A 25	N/A 3/8x3/16 in	N/A 1.81 in46 mm	N/A
88345044277	N/A QF25X1-1/4EU	N/A 1-1/4 in	N/A 25	N/A 1/4x1/8 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
88345044275	N/A QF25X1/2	N/A 1/2 in	N/A 25	N/A 1/8x1/16 in	N/A 1.81 in46 mm	N/A

88345044440

N/A QF50X2-1/16SH

N/A 2-1/16 in

N/A 50

N/A 1/2x1/4 in

N/A 2.16 in54.9 mm

N/A

88345044439

N/A QF50X1-9/16

N/A 1-9/16 in

N/A 50

N/A 3/8x3/16 in

N/A 2.16 in54.9 mm

N/A

88345044438

N/A QF50X1-5/16

N/A 1-5/16 in

N/A 50

N/A 5/16x5/32 in

N/A 2.16 in54.9 mm

N/A

88345044437

N/A QF50X15/16

N/A 15/16 in

N/A 50

N/A 1/4x1/8 in

N/A 2.16 in54.9 mm

N/A

88345044436

N/A QF50X1-3/8EU

N/A 1-3/8 in

N/A 50

N/A 5/16x5/32 in

N/A 2.16 in54.9 mm

N/A

88345044435

N/A QF50X1-3/8E

N/A 1-3/8 in

N/A 50

N/A 3/8x3/16 in

N/A 2.16 in54.9 mm

N/A

88345044434

N/A QF50X1-3/4EU

N/A 1-3/4 in

N/A 50

N/A 3/8x3/16 in

N/A 2.16 in54.9 mm

N/A

88345044433

N/A QF50X1-11/16

N/A 1-11/16 in

N/A 50

N/A 3/8x3/16 in

N/A 2.16 in54.9 mm

N/A

88345044432

N/A QF50X1-1/8SH

N/A 1-1/8 in

N/A 50

N/A 1/4x1/8 in

N/A 2.16 in54.9 mm

N/A

88345044431

N/A QF50X1-1/4SH

N/A 1-1/4 in

N/A 50

N/A 1/4x1/8 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

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

88345044424

N/A QF50S303X2-3/8E

N/A 2-3/8 in

N/A 50

N/A 3/4x3/8 in

N/A 2.16 in54.9 mm

N/A

88345044421

N/A QF50S303X1-3/4E

N/A 1-3/4 in

N/A 50

N/A 1/2x1/4 in

N/A 2.16 in54.9 mm

N/A

88345044419

N/A QF50S303X1-15/16

N/A 1-15/16 in

N/A 50

N/A 1/2x1/4 in

N/A 2.16 in54.9 mm

N/A

88345044418

N/A QF50S303X1-1/4E

N/A 1-1/4 in

N/A 50

N/A 5/16x5/32 in

N/A 2.16 in54.9 mm

N/A

88345044294

N/A QF25X3/4E

N/A 3/4 in

N/A 25

N/A 1/4x1/8 in

N/A 1.81 in46 mm

N/A

88345044286

N/A QF25X2-1/16

N/A 2-1/16 in

N/A 25

N/A 1/2x1/4 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

88345044281

N/A QF25X1-5/16

N/A 1-5/16 in

N/A 25

N/A 5/16x5/32 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

88345044278

N/A QF25X1-11/16U

N/A 1-11/16 in

N/A 25

N/A 3/8x3/16 in

N/A 1.81 in46 mm

N/A

88345044277

N/A QF25X1-1/4EU

N/A 1-1/4 in

N/A 25

N/A 1/4x1/8 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

88345044275

N/A QF25X1/2

N/A 1/2 in

N/A 25

N/A 1/8x1/16 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