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
88345044119	N/A QF175X2-3/16	N/A 2-3/16 in	N/A 175	N/A 1/2x1/4 in	N/A 2.67 in67.8 mm	N/A
88345044091	N/A QF175S303X2-7/16	N/A 2-7/16 in	N/A 175	N/A 5/8x5/16 in	N/A 2.67 in67.8 mm	N/A
88345042982	N/A QF175X2-7/16	N/A 2-7/16 in	N/A 175	N/A 5/8x5/16 in	N/A 2.67 in67.8 mm	N/A
88345044123	N/A QF175X2-7/16U	N/A 2-7/16 in	N/A 175	N/A 5/8x5/16 in	N/A 2.67 in67.8 mm	N/A
88345045824	N/A QF175X2-9/16	N/A 2-9/16 in	N/A 175	N/A 5/8x5/16 in	N/A 2.67 in67.8 mm	N/A
88345042976	N/A QF175X2-11/16	N/A 2-11/16 in	N/A 175	N/A 5/8x5/16 in	N/A 2.67 in67.8 mm	N/A
88345044116	N/A QF175X2-11/16U	N/A 2-11/16 in	N/A 175	N/A 5/8x5/16 in	N/A 2.67 in67.8 mm	N/A
88345044117	N/A QF175X2-13/16U	N/A 2-13/16 in	N/A 175	N/A 3/4x3/8 in	N/A 2.67 in67.8 mm	N/A
88345042977	N/A QF175X2-15/16	N/A 2-15/16 in	N/A 175	N/A 3/4x3/8 in	N/A 2.67 in67.8 mm	N/A
88345042978	N/A QF175X2-15/16E	N/A 2-15/16 in	N/A 175	N/A 7/8x7/16 in	N/A 2.67 in67.8 mm	N/A
88345044118	N/A QF175X2-15/16U	N/A 2-15/16 in	N/A 175	N/A 3/4x3/8 in	N/A 2.67 in67.8 mm	N/A
88345042991	N/A QF175X3-3/16	N/A 3-3/16 in	N/A 175	N/A 3/4x3/8 in	N/A 2.67 in67.8 mm	N/A
88345042992	N/A QF175X3-3/16U	N/A 3-3/16 in	N/A 175	N/A 3/4x3/8 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
88345044101	N/A QF175S303X3-7/16	N/A 3-7/16 in	N/A 175	N/A 7/8x7/16 in	N/A 2.67 in67.8 mm	N/A
88345096027	N/A QF175X3-7/16	N/A 3-7/16 in	N/A 175	N/A 7/8x7/16 in	N/A 2.67 in67.8 mm	N/A
88345096044	N/A QF175X3-7/16U	N/A 3-7/16 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
88345044097	N/A QF175S303X3-15/16	N/A 3-15/16 in	N/A 175	N/A 1x1/2 in	N/A 2.67 in67.8 mm	N/A
88345042990	N/A QF175X3-15/16	N/A 3-15/16 in	N/A 175	N/A 1x1/2 in	N/A 2.67 in67.8 mm	N/A
88345045793	N/A QF175X3-15/16U	N/A 3-15/16 in	N/A 175	N/A 1x1/2 in	N/A 2.67 in67.8 mm	N/A
88345044125	N/A QF175X3/4	N/A 3/4 in	N/A 175	N/A 3/16x3/32 in	N/A 2.67 in67.8 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
88345042931	N/A QF175S303XPB	N/A Pilot 1" in	N/A 175	N/A No Keyway 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

88345044119

N/A QF175X2-3/16

N/A 2-3/16 in

N/A 175

N/A 1/2x1/4 in

N/A 2.67 in67.8 mm

N/A

88345044091

N/A QF175S303X2-7/16

N/A 2-7/16 in

N/A 175

N/A 5/8x5/16 in

N/A 2.67 in67.8 mm

N/A

88345042982

N/A QF175X2-7/16

N/A 2-7/16 in

N/A 175

N/A 5/8x5/16 in

N/A 2.67 in67.8 mm

N/A

88345044123

N/A QF175X2-7/16U

N/A 2-7/16 in

N/A 175

N/A 5/8x5/16 in

N/A 2.67 in67.8 mm

N/A

88345045824

N/A QF175X2-9/16

N/A 2-9/16 in

N/A 175

N/A 5/8x5/16 in

N/A 2.67 in67.8 mm

N/A

88345042976

N/A QF175X2-11/16

N/A 2-11/16 in

N/A 175

N/A 5/8x5/16 in

N/A 2.67 in67.8 mm

N/A

88345044116

N/A QF175X2-11/16U

N/A 2-11/16 in

N/A 175

N/A 5/8x5/16 in

N/A 2.67 in67.8 mm

N/A

88345044117

N/A QF175X2-13/16U

N/A 2-13/16 in

N/A 175

N/A 3/4x3/8 in

N/A 2.67 in67.8 mm

N/A

88345042977

N/A QF175X2-15/16

N/A 2-15/16 in

N/A 175

N/A 3/4x3/8 in

N/A 2.67 in67.8 mm

N/A

88345042978

N/A QF175X2-15/16E

N/A 2-15/16 in

N/A 175

N/A 7/8x7/16 in

N/A 2.67 in67.8 mm

N/A

88345044118

N/A QF175X2-15/16U

N/A 2-15/16 in

N/A 175

N/A 3/4x3/8 in

N/A 2.67 in67.8 mm

N/A

88345042991

N/A QF175X3-3/16

N/A 3-3/16 in

N/A 175

N/A 3/4x3/8 in

N/A 2.67 in67.8 mm

N/A

88345042992

N/A QF175X3-3/16U

N/A 3-3/16 in

N/A 175

N/A 3/4x3/8 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

88345044101

N/A QF175S303X3-7/16

N/A 3-7/16 in

N/A 175

N/A 7/8x7/16 in

N/A 2.67 in67.8 mm

N/A

88345096027

N/A QF175X3-7/16

N/A 3-7/16 in

N/A 175

N/A 7/8x7/16 in

N/A 2.67 in67.8 mm

N/A

88345096044

N/A QF175X3-7/16U

N/A 3-7/16 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

88345044097

N/A QF175S303X3-15/16

N/A 3-15/16 in

N/A 175

N/A 1x1/2 in

N/A 2.67 in67.8 mm

N/A

88345042990

N/A QF175X3-15/16

N/A 3-15/16 in

N/A 175

N/A 1x1/2 in

N/A 2.67 in67.8 mm

N/A

88345045793

N/A QF175X3-15/16U

N/A 3-15/16 in

N/A 175

N/A 1x1/2 in

N/A 2.67 in67.8 mm

N/A

88345044125

N/A QF175X3/4

N/A 3/4 in

N/A 175

N/A 3/16x3/32 in

N/A 2.67 in67.8 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

88345042931

N/A QF175S303XPB

N/A Pilot 1" in

N/A 175

N/A No Keyway 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

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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