QUICK FLEX Standard Hubs with Keyway - Inch (Imperial) Bores On The Timken Company

QUICK FLEX couplings consist of two hubs, one insert, and a cover.

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Bore Size (in)

Coupling Size

Keyway Size (in)

Part Number	Bore Size	Coupling Size	Keyway Size (W x D)	Length thru Bore	CAD

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
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
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
QF250X2-1/8	N/A 2-1/8 in	N/A 250	N/A 1/2X1/4 in	N/A 3.1 in78.7 mm	N/A
QF250X2-1/8U	N/A 2-1/8 in	N/A 250	N/A 1/2X1/4 in	N/A 3.1 in78.7 mm	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
QF250X2-3/8	N/A 2-3/8 in	N/A 250	N/A 5/8X5/16 in	N/A 3.1 in78.7 mm	N/A
QF250X2-5/8	N/A 2-5/8 in	N/A 250	N/A 5/8X5/16 in	N/A 3.1 in78.7 mm	N/A
QF250X2-5/8U	N/A 2-5/8 in	N/A 250	N/A 5/8X5/16 in	N/A 3.1 in78.7 mm	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
QF250X2-7/8	N/A 2-7/8 in	N/A 250	N/A 3/4X3/8 in	N/A 3.1 in78.7 mm	N/A
QF250X2-7/8U	N/A 2-7/8 in	N/A 250	N/A 3/4X3/8 in	N/A 3.1 in78.7 mm	N/A
QF250S303X3-1/8	N/A 3-1/8 in	N/A 250	N/A 3/4X3/8 in	N/A 3.1 in78.7 mm	N/A
QF250X3-1/8	N/A 3-1/8 in	N/A 250	N/A 3/4X3/8 in	N/A 3.1 in78.7 mm	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
QF250X3-3/8	N/A 3-3/8 in	N/A 250	N/A 7/8X7/16 in	N/A 3.1 in78.7 mm	N/A
QF250X3-3/8E	N/A 3-3/8 in	N/A 250	N/A 1x1/2 in	N/A 3.1 in78.7 mm	N/A
QF250X3-3/8U	N/A 3-3/8 in	N/A 250	N/A 7/8X7/16 in	N/A 3.1 in78.7 mm	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
QF250X3-5/8	N/A 3-5/8 in	N/A 250	N/A 7/8X7/16 in	N/A 3.1 in78.7 mm	N/A
QF250X3-5/8U	N/A 3-5/8 in	N/A 250	N/A 7/8X7/16 in	N/A 3.1 in78.7 mm	N/A
QF250X3-7/8	N/A 3-7/8 in	N/A 250	N/A 1x1/2 in	N/A 3.1 in78.7 mm	N/A
QF250X3-7/8U	N/A 3-7/8 in	N/A 250	N/A 1x1/2 in	N/A 3.1 in78.7 mm	N/A
QF250X4-1/8	N/A 4-1/8 in	N/A 250	N/A 1x1/2 in	N/A 3.1 in78.7 mm	N/A
QF250X4-1/8U	N/A 4-1/8 in	N/A 250	N/A 1x1/2 in	N/A 3.1 in78.7 mm	N/A

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reCAPTCHA

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

Bore Size

Coupling Size

Keyway Size (W x D)

Length thru Bore

CAD