DAYTON 5K657A General-Purpose AC Motor, Single-Phase 1/2 HP, 115/208-230V, 3450 RPM, 56C Face/Foot (C-Face), ODP, Ball Bearings, SF 1.65, Auto-Reset Thermal, 5/8″ × 1-7/8″ Shaft (flat) — KS55CXNZ-1029

DAYTON 5K657A General-Purpose AC Motor, Single-Phase 1/2 HP, 115/208-230V, 3450 RPM, 56C Face/Foot (C-Face), ODP, Ball Bearings, SF 1.65, Auto-Reset Thermal, 5/8″ × 1-7/8″ Shaft (flat) — KS55CXNZ-1029

Condition: New – other. Never installed/used. Back endbell/cover shows superficial rust spotting (puddle trace); see photos. Includes original motor only (no cord, pulley, or mounting bolts).

Overview

The DAYTON 5K657A is a compact, general-purpose single-phase AC motor built for belt or direct-coupled light industrial service. With 1/2 HP, 3450 RPM (two-pole), 115/208-230 VAC dual-voltage windings, and a stout Service Factor 1.65, it offers extra headroom for short overloads and tougher starts. The 56C C-face with base (face-mount pilot + foot) makes it a flexible drop-in on pumps, fans, small machinery, and conveyors. Ball bearings, automatic thermal overload, and continuous (CONT) duty round out a durable package for shop and OEM use.

Features

• 1/2 HP, 3450 RPM (60 Hz) single-phase general-purpose motor

• Dual voltage 115/208-230 VAC, field-reconnectable

• High Service Factor: 1.65 for added thermal/mechanical margin

• 56C frame with C-face + foot for direct-couple or base mount flexibility

• Ball bearings for longer life vs. sleeve designs

• Auto-reset thermal overload protection

• Open Dripproof (ODP) ventilation (verify on your nameplate/photos)

• All-angle mount capability; continuous duty to 40 °C ambient

• Reversible rotation (CW/CCW), wire per diagram in terminal box

• Rolled-steel frame; compact 5-5/8″ body diameter

Specifications (as provided)

• Brand / MPN / Model: DAYTON 5K657 / 5K657A

• Alt. ID: KS55CXNZ-1029

• Phase / Frequency: 1-phase, 60 Hz

• Horsepower: 1/2 HP

• Voltage: 115/208-230 VAC (dual-voltage)

• Full-Load Amps (FLA): 6.0/4.0 A (nameplate)

• SFA: 10.0/5.0 A (service-factor amps)

• Nameplate RPM: 3450

• Frame / Mount: 56C (C-face) with base; all-angle mounting

• Enclosure: ODP (open dripproof)

• Insulation Class: A

• Service Factor: 1.65

• Thermal Protection: Automatic (auto-reset)

• Duty/Time rating: CONT (continuous)

• Design / Code: Code M

• Bearings: Ball

• Shaft: 5/8″ dia × 1-7/8″ L, flat

• Dimensions: Overall L 9-15/16″, less shaft 8-7/16″, body Ø 5-5/8″

• Listings: UL Component (E47479), CSA (No. LR2459)

• Max Ambient: 40 °C

Rotation notation: use CCWSE/CWLE convention when documenting. Wire per diagram to obtain required direction.

Applications / Spheres of Application

• Pumps (C-face): small centrifugal/transfer pumps with 56C face mounts

• Fans/Blowers (belt or direct): shop blowers, cabinet fans (ODP location only)

• Machine tools / small conveyors: lathes, polishers, drill presses, feed drives

• Compressors / agitators within HP/RPM envelope and ODP-suitable environments

• OEM equipment needing compact 56C mounting and high SF margin

Cross-Referenced / Identification Numbers

• DAYTON: 5K657, 5K657A

• Alt/Builder code: KS55CXNZ-1029

• UL File: E47479; CSA LR2459

• MFG No.: A75 7; Code M

Comparable Motors (verify frame/shaft/voltage before substituting)

• NBK Parts 56C 1/2 HP, 3450 RPM, 115/208-230V, ODP, ball bearing, reversible — match 5/8″ × 1-7/8″ shaft and SF ≥1.5

• Baldor/ABB EM3615 series (56C, 1/2 HP, 3450, ODP/TEFC variants)

• Leeson 110088/110089 (56C, 1/2 HP, 3450, single-phase)

• Marathon C-Face GP 56C 1/2 HP 2-pole ODP

• U.S. Motors / Nidec 56C 1/2 HP 3450 RPM ODP (2-pole)

• WEG 00118ES1B56C (select 1/2 HP option; verify enclosure and voltage)

What This Motor Can Be Part Of

• Direct-coupled pump packages using 56C pilot and bolt pattern

• Belted blower skids (use adjustable base and guard; set sheaves for target RPM/CFM)

• Compact machinery drives: mixers, grinders, sanders (with proper guarding)

• Fan cabinets where ODP cooling air is clean/dry and ambient ≤ 40 °C

Included

• DAYTON 5K657A motor, back cover, round insert and shaft key (also called a key, parallel/square key, or keystock) seen in the pictures

Not Included

• Cord, plug, base bolts, shaft key, pulley/coupling, or mounting hardware

Related

dayton 5k657a general purpose motor; device to drive pumps, fans, small machinery; 1/2 hp 3450 rpm single-phase motor; 56c c-face footed motor; open dripproof ball-bearing motor; reversible hvac/r drive motor; dual voltage 115/208-230v ac motor; high service factor 1.65 motor; ks55cxnz-1029 equivalent; nbk parts 56c 1/2 hp motor

Common Requests:

1. “Is this the 56C face model with a 5/8″ shaft?”

2. “Can I wire it for 115V or 230V and how do I reverse rotation?”

3. “Is ODP acceptable in my location, or do I need TEFC?”

4. “What size pulley can I run at this SF 1.65 and amperage?”

5. “Will it bolt up to my C-face pump without an adapter?”

Trademarks: DAYTON® and other manufacturer names are the property of their respective owners. They are used here solely to identify compatibility and specifications.

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