Every industrial motor purchase starts with a simple question: what power does my equipment actually need, and does my building have the right electrical service to feed it? The four motors in this guide-three Baldor models and one Dayton-sit at very different points on that map, and their prices reflect that.
If you're replacing a motor, the fastest way to narrow the list is to match the phase and horsepower first, then look at condition and price. Below is the full comparison.
Listed Prices at a Glance
| Motor | Listed Price | Price Bar |
|---|---|---|
| Baldor Base-Mounted Motor | USD 600.00 | |
| Baldor 5F604-1709 | USD 450.00 | |
| Baldor Reliance L3507 .75 HP | USD 237.50 | |
| Dayton 15 HP TEFC Motor | USD 1,500.00 |
How to Choose Based on Your Setup
| Motor | Best For | Keep In Mind |
|---|---|---|
| Baldor Base-Mounted Motor | Shops that want a used Baldor with a simple base mount | Used condition; no power rating is listed |
| Baldor 5F604-1709 | New general-purpose motors | Needs 460V AC service |
| Baldor Reliance L3507 | Single-phase applications with modest .75 HP needs | Used condition with visible cosmetic wear |
| Dayton 15 HP TEFC Motor | High-power jobs needing a TEFC enclosure | New open box; highest listed price |
Baldor Base-Mounted Motor
Priced at USD 600.00, this used Baldor is the middle ground in the lineup. The base-mounted design includes a mounting bracket, which is handy when you need to drop a motor onto a flat surface without a custom adapter. As a used unit, it carries that as-is character-there's no new-motor freshness here. Because horsepower and phase are not specified, this is a better fit for a buyer who already knows the motor matches the machine's existing mount and power needs. If you prefer a brand-new unit with full specs, you'd be better served by the Baldor 5F604-1709.
Baldor 5F604-1709
The Baldor 5F604-1709 is a new motor listed at USD 450.00. It runs on 60 Hz with a 1725 RPM output, and it's rated at 5 HP and 460V AC. It also carries a NEMA Design B (General Purpose) rating with a T-frame suffix, which points to a broad general-purpose role in industrial automation and motion control. The reversible keyed shaft adds flexibility for belt or coupling drives. The catch is that you'll need a 460V AC power source to run it. For less than the price of the used base-mounted Baldor, you're getting a new motor with clear specifications.
Baldor Reliance L3507 .75 HP Motor
At USD 237.50, the Baldor Reliance L3507 is the most affordable motor here and the only single-phase option. It's rated at .75 HP and 1725 RPM with a nominal input of 115/230V, making it the choice for lighter jobs or applications where single-phase is the only service available. The used condition is the trade-off: it shows scuffs, scratches, rust, and chipping paint, and it's framed as a replacement or rebuild motor. For a single-phase motor at this price, the low cost can justify the visible wear-provided the buyer is comfortable working with a used unit.
Dayton 15 HP TEFC Motor
This Dayton is the heavyweight, both in power and price: USD 1,500.00. It's a new open-box motor-unused but without the original manufacturer's packaging. The 15 HP output is more than ten times the .75 HP of the L3507, and the 230/460V input gives flexibility when your line voltage is either 230V or 460V. The TEFC (Totally Enclosed Fan Cooled) enclosure is the standout feature, protecting the windings from dust, dirt, and moisture. The foot-mounted frame 254T is a standard NEMA frame. If you need real horsepower and a sealed enclosure, this is the motor to beat.
The Bottom Line
Your decision comes down to the application:
- Need single-phase and light duty? The Baldor Reliance L3507 is the lowest-priced entry point, if you accept used condition.
- Want a new motor with clear specs? The Baldor 5F604-1709 delivers 5 HP and 460V at a mid-range price.
- Chasing maximum power? The Dayton 15 HP is the only 15 HP motor here.
- Simply need a used base-mounted Baldor? The Baldor base-mounted motor gives you a ready-to-mount used option.
Match the phase and horsepower to the machine you're driving, then let condition and price settle the rest.
