We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Closed linear ball bushing bearing, 3/4 inch bore, stainless steel and polymer cage

Dayton

Dayton 2CNK3 Ball Bushing Bearing Closed 3/4 In

SKU CH-SMZQ-191WN

Linear ball bearing with 3/4 in bore, 193 lbf dynamic and 308 lbf static load ratings, operating from -4 °F to 176 °F at up to 5000 in/min

  • Smooth linear motion with 3/4 in bore and 1 1/4 in outside diameter
  • Handles dynamic loads up to 193 lbf for reliable power transmission
  • Static capacity of 308 lbf supports heavy stationary loads
  • Operates from -4 °F to 176 °F across demanding environments
  • Precision tolerance of ± .001 in ensures accurate alignment

Precision Linear Bearing

The Dayton 2CNK3 is a closed linear ball bushing with a 3/4 inch bore and 1 1/4 inch outside diameter. It uses a stainless steel and polymer cage for smooth linear motion in inch-based machinery. Builders and maintenance teams select it for fixed-alignment guide rails where self-alignment is not required.

Thermal and Speed Limits

The bearing operates continuously between -4 and 176 degrees Fahrenheit without lubrication breakdown. Steady state speed is rated at 5000 inches per minute for reliable motion cycles. Dynamic load capacity reaches 193 lbf while static capacity holds at 308 lbf for structural calculations.

Critical Fit Specification

Inside diameter tolerance is held to +/- .001 inch for precise shaft engagement. Verify your shaft diameter falls within this window before ordering. Buyers needing self-aligning action or metric dimensions should choose a different series.

Highlights

  • Smooth linear motion with 3/4 in bore and 1 1/4 in outside diameter
  • Handles dynamic loads up to 193 lbf for reliable power transmission
  • Static capacity of 308 lbf supports heavy stationary loads
  • Operates from -4 °F to 176 °F across demanding environments
  • Precision tolerance of ± .001 in ensures accurate alignment

Specifications

No published specifications for this item yet.

Questions about this item

How do I press the 3/4 in bore bearing into its housing without damaging the polymer cage?

Use an arbor press or gentle hammer taps on the outer race only, keeping force off the cage; the +/- .001 in bore tolerance requires a snug but not forced fit.

When should I plan to replace the bearing based on its dynamic load rating of 193 lbf?

Replace when measured linear play exceeds the original clearance or when the 193 lbf dynamic capacity can no longer support the application load without noise or binding.

What operational limit is reached first if the shaft runs continuously at 5000 in/min?

Continuous 5000 in/min operation will drive internal temperature toward the 176 °F maximum, making thermal limit the first constraint encountered.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.