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
88345043183	N/A QF50X1-7/8U	N/A 1-7/8 in	N/A 50	N/A 1/2x1/4 in	N/A 2.16 in54.9 mm	N/A
88345043184	N/A QF50X2-1/16	N/A 2-1/16 in	N/A 50	N/A 1/2x1/4 in	N/A 2.16 in54.9 mm	N/A
88345043186	N/A QF50X2-1/4U	N/A 2-1/4 in	N/A 50	N/A 1/2x1/4 in	N/A 2.16 in54.9 mm	N/A
88345043187	N/A QF50X2-1/8U	N/A 2-1/8 in	N/A 50	N/A 1/2x1/4 in	N/A 2.16 in54.9 mm	N/A
88345043188	N/A QF50X2-3/16E	N/A 2-3/16 in	N/A 50	N/A 5/8x5/16 in	N/A 2.16 in54.9 mm	N/A
88345043189	N/A QF50X2-3/8U	N/A 2-3/8 in	N/A 50	N/A 5/8x5/16 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
88345043197	N/A QF5S303X15/16	N/A 15/16 in	N/A 5	N/A 1/4 x 1/8 in	N/A 1.08 in27.4 mm	N/A
88345043200	N/A QF5S303X3/4U	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
88345043202	N/A QF5S303X5/8U	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
88345043203	N/A QF5S303X7/8E	N/A 7/8 in	N/A 5	N/A 1/4x1/8 in	N/A 1.08 in27.4 mm	N/A
88345043215	N/A QF250X3-1/16	N/A 3-1/16 in	N/A 250	N/A 3/4x3/8 in	N/A 3.1 in78.7 mm	N/A
88345043223	N/A QF100X2-1/4U	N/A 2-1/4 in	N/A 100	N/A 1/2x1/4 in	N/A 2.46 in62.5 mm	N/A
88345043224	N/A QF175X3U	N/A 3 in	N/A 175	N/A 3/4x3/8 in	N/A 2.67 in67.8 mm	N/A
88345043226	N/A QF50S303X1-1/4	N/A 1-1/4 in	N/A 50	N/A 1/4x1/8 in	N/A 2.16 in54.9 mm	N/A
88345043250	N/A QF175X2-1/4E	N/A 2-1/4 in	N/A 175	N/A 5/8x5/16 in	N/A 2.67 in67.8 mm	N/A
88345043251	N/A QF175XNB	N/A Solid in	N/A 175	N/A No Keyway in	N/A 2.67 in67.8 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
88345043300	N/A QF175X1-3/4U	N/A 1-3/4 in	N/A 175	N/A 3/8x3/16 in	N/A 2.67 in67.8 mm	N/A
88345043334	N/A QF15XNB	N/A Solid in	N/A 15	N/A No Keyway in	N/A 1.34 in34 mm	N/A
88345043674	N/A QF15X7/8U	N/A 7/8 in	N/A 15	N/A 3/16 x 3/32 in	N/A 1.34 in34 mm	N/A
88345043675	N/A QF15X1-3/16U	N/A 1-3/16 in	N/A 15	N/A 1/4x1/8 in	N/A 1.34 in34 mm	N/A
88345043676	N/A QF15X1-7/16U	N/A 1-7/16 in	N/A 15	N/A 3/8x3/16 in	N/A 1.34 in34 mm	N/A
88345043677	N/A QF15X1-1/2U	N/A 1-1/2 in	N/A 15	N/A 3/8 x 3/16 in	N/A 1.34 in34 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

88345043183

N/A QF50X1-7/8U

N/A 1-7/8 in

N/A 50

N/A 1/2x1/4 in

N/A 2.16 in54.9 mm

N/A

88345043184

N/A QF50X2-1/16

N/A 2-1/16 in

N/A 50

N/A 1/2x1/4 in

N/A 2.16 in54.9 mm

N/A

88345043186

N/A QF50X2-1/4U

N/A 2-1/4 in

N/A 50

N/A 1/2x1/4 in

N/A 2.16 in54.9 mm

N/A

88345043187

N/A QF50X2-1/8U

N/A 2-1/8 in

N/A 50

N/A 1/2x1/4 in

N/A 2.16 in54.9 mm

N/A

88345043188

N/A QF50X2-3/16E

N/A 2-3/16 in

N/A 50

N/A 5/8x5/16 in

N/A 2.16 in54.9 mm

N/A

88345043189

N/A QF50X2-3/8U

N/A 2-3/8 in

N/A 50

N/A 5/8x5/16 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

88345043197

N/A QF5S303X15/16

N/A 15/16 in

N/A 5

N/A 1/4 x 1/8 in

N/A 1.08 in27.4 mm

N/A

88345043200

N/A QF5S303X3/4U

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

88345043202

N/A QF5S303X5/8U

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

88345043203

N/A QF5S303X7/8E

N/A 7/8 in

N/A 5

N/A 1/4x1/8 in

N/A 1.08 in27.4 mm

N/A

88345043215

N/A QF250X3-1/16

N/A 3-1/16 in

N/A 250

N/A 3/4x3/8 in

N/A 3.1 in78.7 mm

N/A

88345043223

N/A QF100X2-1/4U

N/A 2-1/4 in

N/A 100

N/A 1/2x1/4 in

N/A 2.46 in62.5 mm

N/A

88345043224

N/A QF175X3U

N/A 3 in

N/A 175

N/A 3/4x3/8 in

N/A 2.67 in67.8 mm

N/A

88345043226

N/A QF50S303X1-1/4

N/A 1-1/4 in

N/A 50

N/A 1/4x1/8 in

N/A 2.16 in54.9 mm

N/A

88345043250

N/A QF175X2-1/4E

N/A 2-1/4 in

N/A 175

N/A 5/8x5/16 in

N/A 2.67 in67.8 mm

N/A

88345043251

N/A QF175XNB

N/A Solid in

N/A 175

N/A No Keyway in

N/A 2.67 in67.8 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

88345043300

N/A QF175X1-3/4U

N/A 1-3/4 in

N/A 175

N/A 3/8x3/16 in

N/A 2.67 in67.8 mm

N/A

88345043334

N/A QF15XNB

N/A Solid in

N/A 15

N/A No Keyway in

N/A 1.34 in34 mm

N/A

88345043674

N/A QF15X7/8U

N/A 7/8 in

N/A 15

N/A 3/16 x 3/32 in

N/A 1.34 in34 mm

N/A

88345043675

N/A QF15X1-3/16U

N/A 1-3/16 in

N/A 15

N/A 1/4x1/8 in

N/A 1.34 in34 mm

N/A

88345043676

N/A QF15X1-7/16U

N/A 1-7/16 in

N/A 15

N/A 3/8x3/16 in

N/A 1.34 in34 mm

N/A

88345043677

N/A QF15X1-1/2U

N/A 1-1/2 in

N/A 15

N/A 3/8 x 3/16 in

N/A 1.34 in34 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

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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