Your use case (drilling the sides of 4×4 posts + cutting ¾" plywood) needs two things most buyers overlook: Z-axis clearance and spindle torque at low RPM.
| Pump Type | Typical CFM | HP Range | Best For | Price Range |
|---|---|---|---|---|
| Regenerative blower (Becker) | 150–400 CFM | 5–10 HP | Full-sheet plywood, MDF (porous materials OK) | $2,000–5,000 |
| Rotary vane (Busch) | 50–150 CFM | 3–7.5 HP | Non-porous: plastics, solid wood, aluminum | $3,000–8,000 |
| Liquid ring | 100–300 CFM | 5–15 HP | Heavy industrial, dusty environments | $5,000–12,000 |
Most industrial 4×8 routers require 3-phase power. If your shop only has single-phase:
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