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Couplings & Stub Shafts

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Popular Stock Couplings

DTO Series Couplings

  • DTO125 Style — 2.0" length with inserts

  • DTO150 Style — 2.37" length with inserts (can also be bored to specification)

ATO Series Couplings (Anti-Backlash)

  • ATO125-PREBORED — 2.0" length with 5/16"–5/8" bores

  • ATO125-PREBORED — 2.0" length with 3/8"–5/8" bores

Helical Couplings

  • Helical Anti-Backlash — 3.0" length, 1.25" OD, with 5/16"–5/8" bores

  • Helical BT150 Style — 3.5" length, 1.5" OD, with 5/16" × 5/8" bores

Additional Sizes Available — In Stock and Ready to Ship

PRECISION MACHINING SERVICES
We work closely with experienced representatives to provide:

~ CNC CUTTING ~ ~ MILLING ~ ~ TURNING ~ ~ ROUTING ~

TIGHT TOLERANCES HELD!
SMALL PRODUCTION RUNS WELCOME!

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Popular Stock Stub Shafts

We carry a range of popular stock stub shafts available in multiple thread sizes and configurations to meet various equipment and repair needs.

Standard Thread Sizes:

  • 3/8" Thread

  • 1/2" Thread

  • 5/8" Thread

GE Large Stub Options:

  • 1.0" Threaded

  • 1.5" Threaded

Reliance Press-In Types:

  • 0.625"

  • 0.500"

  • 0.375"

Reliance Threaded Types:

  • 8mm × 1.25

  • 12mm × 1.25 — Overall Length: 4.25", Usable Length: 3-1/8"

Columbus Fan & Machine

PHONE: (401)247-0079

EMAIL: ColumbusFanRI@gmail.com

​DC Industrial Sales

PHONE: (401-)245-3330

EMAIL: DCIndustrialSales@Gamil.com

Customer Support is our main focus!

INDUSTRIAL  &  RESIDENTIAL
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© 2025 Columbus Machine/DC Industrial

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