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
88345044226	N/A QF250X2-1/4U	N/A 2-1/4 in	N/A 250	N/A 1/2x1/4 in	N/A 3.1 in78.7 mm	N/A
88345044225	N/A QF250X2-1/2U	N/A 2-1/2 in	N/A 250	N/A 5/8x5/16 in	N/A 3.1 in78.7 mm	N/A
88345044224	N/A QF250X2-1/2	N/A 2-1/2 in	N/A 250	N/A 5/8x5/16 in	N/A 3.1 in78.7 mm	N/A
88345044223	N/A QF250X1-7/8	N/A 1-7/8 in	N/A 250	N/A 1/2x1/4 in	N/A 3.1 in78.7 mm	N/A
88345044222	N/A QF250X1-3/8	N/A 1-3/8 in	N/A 250	N/A 5/16x5/32 in	N/A 3.1 in78.7 mm	N/A
88345044221	N/A QF250X1-3/4	N/A 1-3/4 in	N/A 250	N/A 3/8x3/16 in	N/A 3.1 in78.7 mm	N/A
88345044220	N/A QF250X1-1/8	N/A 1-1/8 in	N/A 250	N/A 1/4x1/8 in	N/A 3.1 in78.7 mm	N/A
88345044219	N/A QF250X1-1/4	N/A 1-1/4 in	N/A 250	N/A 1/4x1/8 in	N/A 3.1 in78.7 mm	N/A
88345044218	N/A QF250X1-1/2	N/A 1-1/2 in	N/A 250	N/A 3/8x3/16 in	N/A 3.1 in78.7 mm	N/A
88345044217	N/A QF250X1	N/A 1 in	N/A 250	N/A 1/4x1/8 in	N/A 3.1 in78.7 mm	N/A
88345044210	N/A QF250S303X3-5/8	N/A 3-5/8 in	N/A 250	N/A 7/8x7/16 in	N/A 3.1 in78.7 mm	N/A
88345044208	N/A QF250S303X3-3/8	N/A 3-3/8 in	N/A 250	N/A 7/8x7/16 in	N/A 3.1 in78.7 mm	N/A
88345044207	N/A QF250S303X3-15/16	N/A 3-15/16 in	N/A 250	N/A 1x1/2 in	N/A 3.1 in78.7 mm	N/A
88345044206	N/A QF250S303X3	N/A 3 in	N/A 250	N/A 3/4x3/8 in	N/A 3.1 in78.7 mm	N/A
88345044205	N/A QF250S303X2-7/8	N/A 2-7/8 in	N/A 250	N/A 3/4x3/8 in	N/A 3.1 in78.7 mm	N/A
88345044204	N/A QF250S303X2-3/8	N/A 2-3/8 in	N/A 250	N/A 5/8x5/16 in	N/A 3.1 in78.7 mm	N/A
88345044203	N/A QF250S303X2-15/16	N/A 2-15/16 in	N/A 250	N/A 3/4x3/8 in	N/A 3.1 in78.7 mm	N/A
88345044202	N/A QF250S303X2-1/8	N/A 2-1/8 in	N/A 250	N/A 1/2x1/4 in	N/A 3.1 in78.7 mm	N/A
88345044142	N/A QF175X7/8	N/A 7/8 in	N/A 175	N/A 3/16x3/32 in	N/A 2.67 in67.8 mm	N/A
88345044132	N/A QF175X3-7/8USH	N/A 3-7/8 in	N/A 175	N/A 1x1/2 in	N/A 2.67 in67.8 mm	N/A
88345044130	N/A QF175X3-5/8U	N/A 3-5/8 in	N/A 175	N/A 7/8x7/16 in	N/A 2.67 in67.8 mm	N/A
88345044129	N/A QF175X3-5/16	N/A 3-5/16 in	N/A 175	N/A 7/8x7/16 in	N/A 2.67 in67.8 mm	N/A
88345044128	N/A QF175X3-3/8UKW	N/A 3-3/8 in	N/A 175	N/A 7/8x7/16 in	N/A 2.67 in67.8 mm	N/A
88345044127	N/A QF175X3-3/4U	N/A 3-3/4 in	N/A 175	N/A 7/8x7/16 in	N/A 2.67 in67.8 mm	N/A
88345044126	N/A QF175X3-11/16	N/A 3-11/16 in	N/A 175	N/A 7/8x7/16 in	N/A 2.67 in67.8 mm	N/A

88345044226

N/A QF250X2-1/4U

N/A 2-1/4 in

N/A 250

N/A 1/2x1/4 in

N/A 3.1 in78.7 mm

N/A

88345044225

N/A QF250X2-1/2U

N/A 2-1/2 in

N/A 250

N/A 5/8x5/16 in

N/A 3.1 in78.7 mm

N/A

88345044224

N/A QF250X2-1/2

N/A 2-1/2 in

N/A 250

N/A 5/8x5/16 in

N/A 3.1 in78.7 mm

N/A

88345044223

N/A QF250X1-7/8

N/A 1-7/8 in

N/A 250

N/A 1/2x1/4 in

N/A 3.1 in78.7 mm

N/A

88345044222

N/A QF250X1-3/8

N/A 1-3/8 in

N/A 250

N/A 5/16x5/32 in

N/A 3.1 in78.7 mm

N/A

88345044221

N/A QF250X1-3/4

N/A 1-3/4 in

N/A 250

N/A 3/8x3/16 in

N/A 3.1 in78.7 mm

N/A

88345044220

N/A QF250X1-1/8

N/A 1-1/8 in

N/A 250

N/A 1/4x1/8 in

N/A 3.1 in78.7 mm

N/A

88345044219

N/A QF250X1-1/4

N/A 1-1/4 in

N/A 250

N/A 1/4x1/8 in

N/A 3.1 in78.7 mm

N/A

88345044218

N/A QF250X1-1/2

N/A 1-1/2 in

N/A 250

N/A 3/8x3/16 in

N/A 3.1 in78.7 mm

N/A

88345044217

N/A QF250X1

N/A 1 in

N/A 250

N/A 1/4x1/8 in

N/A 3.1 in78.7 mm

N/A

88345044210

N/A QF250S303X3-5/8

N/A 3-5/8 in

N/A 250

N/A 7/8x7/16 in

N/A 3.1 in78.7 mm

N/A

88345044208

N/A QF250S303X3-3/8

N/A 3-3/8 in

N/A 250

N/A 7/8x7/16 in

N/A 3.1 in78.7 mm

N/A

88345044207

N/A QF250S303X3-15/16

N/A 3-15/16 in

N/A 250

N/A 1x1/2 in

N/A 3.1 in78.7 mm

N/A

88345044206

N/A QF250S303X3

N/A 3 in

N/A 250

N/A 3/4x3/8 in

N/A 3.1 in78.7 mm

N/A

88345044205

N/A QF250S303X2-7/8

N/A 2-7/8 in

N/A 250

N/A 3/4x3/8 in

N/A 3.1 in78.7 mm

N/A

88345044204

N/A QF250S303X2-3/8

N/A 2-3/8 in

N/A 250

N/A 5/8x5/16 in

N/A 3.1 in78.7 mm

N/A

88345044203

N/A QF250S303X2-15/16

N/A 2-15/16 in

N/A 250

N/A 3/4x3/8 in

N/A 3.1 in78.7 mm

N/A

88345044202

N/A QF250S303X2-1/8

N/A 2-1/8 in

N/A 250

N/A 1/2x1/4 in

N/A 3.1 in78.7 mm

N/A

88345044142

N/A QF175X7/8

N/A 7/8 in

N/A 175

N/A 3/16x3/32 in

N/A 2.67 in67.8 mm

N/A

88345044132

N/A QF175X3-7/8USH

N/A 3-7/8 in

N/A 175

N/A 1x1/2 in

N/A 2.67 in67.8 mm

N/A

88345044130

N/A QF175X3-5/8U

N/A 3-5/8 in

N/A 175

N/A 7/8x7/16 in

N/A 2.67 in67.8 mm

N/A

88345044129

N/A QF175X3-5/16

N/A 3-5/16 in

N/A 175

N/A 7/8x7/16 in

N/A 2.67 in67.8 mm

N/A

88345044128

N/A QF175X3-3/8UKW

N/A 3-3/8 in

N/A 175

N/A 7/8x7/16 in

N/A 2.67 in67.8 mm

N/A

88345044127

N/A QF175X3-3/4U

N/A 3-3/4 in

N/A 175

N/A 7/8x7/16 in

N/A 2.67 in67.8 mm

N/A

88345044126

N/A QF175X3-11/16

N/A 3-11/16 in

N/A 175

N/A 7/8x7/16 in

N/A 2.67 in67.8 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