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Smarter Bearing Selection Is Here

The Timken® Syber® Bearing System Designer Tool now features Smart Selection, enabling users to find the right bearing faster by filtering options based on target life and key dimensions.

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Analyze Bearing Performance in an Application with Timken® Syber® Bearing System Designer

A powerful software tool that combines calculators and configurators to assist you with application design, bearing selection, installation, and troubleshooting. It’s free, easy-to-use, and accessible 24/7.

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  • QUICK FLEX Coupling Hub Photo
  • QF cutaway 1
  • QuickFlex-Dim
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

Description 

Bore Size 

Coupling Size

Keyway Size (W x D)

Length thru Bore

CAD

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 CAD
N/A QF5S303X1U N/A 1 in N/A 5 N/A 1/4x1/8 in N/A 1.08 in27.4 mm N/A
N/A QF5S303X1-1/4 N/A 1-1/4 in N/A 5 N/A 1/4x1/8 in N/A 1.08 in27.4 mm N/A
N/A QF5S303X1-1/4E N/A 1-1/4 in N/A 5 N/A 5/16X5/32 in N/A 1.08 in27.4 mm N/A
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
N/A QF5S303X1-1/16 N/A 1-1/16 in N/A 5 N/A 1/4x1/8 in N/A 1.08 in27.4 mm N/A
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
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
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
N/A QF5S303X3/4E N/A 3/4 in N/A 5 N/A 1/4x1/8 in N/A 1.08 in27.4 mm N/A
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
N/A QF5S303X3/8 N/A 3/8 in N/A 5 N/A 3/32 x 3/64 in N/A 1.08 in27.4 mm N/A
N/A QF5S303X3/8E N/A 3/8 in N/A 5 N/A 1/8 x 1/16 in N/A 1.08 in27.4 mm N/A
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
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
N/A QF5S303X7/8 N/A 7/8 in N/A 5 N/A 3/16 x 3/32 in N/A 1.08 in27.4 mm N/A
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
N/A QF5S303X9/16 N/A 9/16 in N/A 5 N/A 1/8 x 1/16 in N/A 1.08 in27.4 mm N/A
N/A QF5S303X13/16 N/A 13/16 in N/A 5 N/A 3/16 x 3/32 in N/A 1.08 in27.4 mm N/A
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
N/A QF5S303XPB N/A Pilot in N/A 5 N/A No Keyway in N/A 1.08 in27.4 mm N/A
N/A QF15S303X1 N/A 1 in N/A 15 N/A 1/4 x 1/8 in N/A 1.34 in34 mm N/A
N/A QF15S303X1E N/A 1 in N/A 15 N/A 5/16 x 5/32 in N/A 1.34 in34 mm N/A
N/A QF15S304X1 N/A 1 in N/A 15 N/A 1/4 x 1/8 in N/A 1.34 in34 mm N/A
N/A QF15X1 N/A 1 in N/A 15 N/A 1/4 x 1/8 in N/A 1.34 in34 mm N/A
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