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
88345005322	N/A QF25X3/4	N/A 3/4 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
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
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
88345005382	N/A QF50X1-1/4	N/A 1-1/4 in	N/A 50	N/A 1/4x1/8 in	N/A 2.16 in54.9 mm	N/A
88345005383	N/A QF50X1-1/8	N/A 1-1/8 in	N/A 50	N/A 1/4x1/8 in	N/A 2.16 in54.9 mm	N/A
88345005384	N/A QF50X1-15/16	N/A 1-15/16 in	N/A 50	N/A 1/2x1/4 in	N/A 2.16 in54.9 mm	N/A
88345005385	N/A QF50X1-3/8	N/A 1-3/8 in	N/A 50	N/A 5/16x5/32 in	N/A 2.16 in54.9 mm	N/A
88345005386	N/A QF50X1-5/8	N/A 1-5/8 in	N/A 50	N/A 3/8x3/16 in	N/A 2.16 in54.9 mm	N/A
88345005387	N/A QF50X1-7/16	N/A 1-7/16 in	N/A 50	N/A 3/8x3/16 in	N/A 2.16 in54.9 mm	N/A
88345005388	N/A QF50X1-7/8	N/A 1-7/8 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
88345005391	N/A QF50X2-1/4	N/A 2-1/4 in	N/A 50	N/A 1/2x1/4 in	N/A 2.16 in54.9 mm	N/A
88345005392	N/A QF50X2-1/8	N/A 2-1/8 in	N/A 50	N/A 1/2x1/4 in	N/A 2.16 in54.9 mm	N/A
88345005393	N/A QF50X2-3/16	N/A 2-3/16 in	N/A 50	N/A 1/2x1/4 in	N/A 2.16 in54.9 mm	N/A
88345005394	N/A QF50X2-3/8	N/A 2-3/8 in	N/A 50	N/A 5/8x5/16 in	N/A 2.16 in54.9 mm	N/A
88345005403	N/A QF50X7/8	N/A 7/8 in	N/A 50	N/A 3/16x3/32 in	N/A 2.16 in54.9 mm	N/A
88345005405	N/A QF50XPB	N/A Pilot 23/32 in	N/A 50	N/A No Keyway in	N/A 2.16 in54.9 mm	N/A
88345005412	N/A QF5S303X1	N/A 1 in	N/A 5	N/A 1/4x1/8 in	N/A 1.08 in27.4 mm	N/A
88345005413	N/A QF5S303X1/2	N/A 1/2 in	N/A 5	N/A 1/8x1/16 in	N/A 1.08 in27.4 mm	N/A
88345005414	N/A QF5S303X1-1/8	N/A 1-1/8 in	N/A 5	N/A 1/4x1/8 in	N/A 1.08 in27.4 mm	N/A
88345005415	N/A QF5S303X1-3/16	N/A 1-3/16 in	N/A 5	N/A 1/4x1/8 in	N/A 1.08 in27.4 mm	N/A
88345005416	N/A QF5S303X3/4	N/A 3/4 in	N/A 5	N/A 3/16 x 3/32 in	N/A 1.08 in27.4 mm	N/A
88345005417	N/A QF5S303X5/8	N/A 5/8 in	N/A 5	N/A 3/16 x 3/32 in	N/A 1.08 in27.4 mm	N/A

88345005322

N/A QF25X3/4

N/A 3/4 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

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

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

88345005382

N/A QF50X1-1/4

N/A 1-1/4 in

N/A 50

N/A 1/4x1/8 in

N/A 2.16 in54.9 mm

N/A

88345005383

N/A QF50X1-1/8

N/A 1-1/8 in

N/A 50

N/A 1/4x1/8 in

N/A 2.16 in54.9 mm

N/A

88345005384

N/A QF50X1-15/16

N/A 1-15/16 in

N/A 50

N/A 1/2x1/4 in

N/A 2.16 in54.9 mm

N/A

88345005385

N/A QF50X1-3/8

N/A 1-3/8 in

N/A 50

N/A 5/16x5/32 in

N/A 2.16 in54.9 mm

N/A

88345005386

N/A QF50X1-5/8

N/A 1-5/8 in

N/A 50

N/A 3/8x3/16 in

N/A 2.16 in54.9 mm

N/A

88345005387

N/A QF50X1-7/16

N/A 1-7/16 in

N/A 50

N/A 3/8x3/16 in

N/A 2.16 in54.9 mm

N/A

88345005388

N/A QF50X1-7/8

N/A 1-7/8 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

88345005391

N/A QF50X2-1/4

N/A 2-1/4 in

N/A 50

N/A 1/2x1/4 in

N/A 2.16 in54.9 mm

N/A

88345005392

N/A QF50X2-1/8

N/A 2-1/8 in

N/A 50

N/A 1/2x1/4 in

N/A 2.16 in54.9 mm

N/A

88345005393

N/A QF50X2-3/16

N/A 2-3/16 in

N/A 50

N/A 1/2x1/4 in

N/A 2.16 in54.9 mm

N/A

88345005394

N/A QF50X2-3/8

N/A 2-3/8 in

N/A 50

N/A 5/8x5/16 in

N/A 2.16 in54.9 mm

N/A

88345005403

N/A QF50X7/8

N/A 7/8 in

N/A 50

N/A 3/16x3/32 in

N/A 2.16 in54.9 mm

N/A

88345005405

N/A QF50XPB

N/A Pilot 23/32 in

N/A 50

N/A No Keyway in

N/A 2.16 in54.9 mm

N/A

88345005412

N/A QF5S303X1

N/A 1 in

N/A 5

N/A 1/4x1/8 in

N/A 1.08 in27.4 mm

N/A

88345005413

N/A QF5S303X1/2

N/A 1/2 in

N/A 5

N/A 1/8x1/16 in

N/A 1.08 in27.4 mm

N/A

88345005414

N/A QF5S303X1-1/8

N/A 1-1/8 in

N/A 5

N/A 1/4x1/8 in

N/A 1.08 in27.4 mm

N/A

88345005415

N/A QF5S303X1-3/16

N/A 1-3/16 in

N/A 5

N/A 1/4x1/8 in

N/A 1.08 in27.4 mm

N/A

88345005416

N/A QF5S303X3/4

N/A 3/4 in

N/A 5

N/A 3/16 x 3/32 in

N/A 1.08 in27.4 mm

N/A

88345005417

N/A QF5S303X5/8

N/A 5/8 in

N/A 5

N/A 3/16 x 3/32 in

N/A 1.08 in27.4 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