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Black Dayton blower motor base, NEMA 143/145 frame, rectangular metal form

Dayton

Dayton 6YTR4 Blower Motor Base NEMA 143/145

SKU CH-X8NQ-T5MC5

Automatic motor base fits NEMA 143/145 frames with single adjusting bolt

  • Product colorBlack
  • Automatic tensioning for NEMA 143/145 frames
  • Single adjusting bolt simplifies belt alignment
  • 11 3/4 in length fits standard motor mounts
  • 8 1/2 in width matches common blower footprints
  • Black finish resists corrosion in HVAC environments

Automatic Motor Base for NEMA 143/145 Frames

The Dayton 6YTR4 is an automatic motor base designed to fit NEMA frame sizes 143 and 145. It provides a mounting platform for compatible electric motors in HVAC and industrial blower applications. The base includes one adjusting bolt for belt tension control. Its black finish suits standard equipment environments.

Replaces Fixed Mounts When Belt Tension Must Be

This base upgrades from a fixed motor mount by allowing automatic or manual belt tension adjustment through its single adjusting bolt. The jump is worth it when motor position must shift to maintain proper belt engagement over time. It suits installations where vibration or thermal expansion changes belt slack. Fixed mounts cannot compensate for these changes.

Handles NEMA 143 and 145 Motors Within 11 3/4

The base accommodates motors matching NEMA 143 and 145 frame dimensions within an overall length of 11 3/4 in, width of 8 1/2 in and height of 1 7/8 in. It runs out when the motor frame exceeds these NEMA sizes or when the mounting footprint exceeds the base dimensions. Larger frames or multi-bolt adjustment needs require a different base.

How it compares

Measured against everything we stock in Air Blowers & Movers, at today’s prices. Recalculated every night.

Price $279.99
Pricier than about 61% of the 322 comparable items (median $143.49).

Specifications

Product
Brand nameDAYTON
Product colorBlack

Questions about this item

What NEMA frame sizes fit the Dayton 6YTR4 motor base?

The base accepts NEMA 143 and 145 frames, with an overall length of 11 3/4 in, width of 8 1/2 in and height of 1 7/8 in.

How is the automatic base adjusted, and what step is often missed?

A single adjusting bolt sets belt tension; the common error is tightening the bolt before the motor is fully aligned with the driven shaft.

Which parts of the Dayton 6YTR4 base wear and need replacement?

The adjusting bolt threads and the pivot points take the most stress; inspect them during routine belt changes and replace if movement becomes uneven.

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