The CN445R3 delivers what Montana roofing contractors need most — a tar-resistant nose that lasts 8x longer than conventional tools plus a maintenance-free filter system that actually works. At 5.2 lbs, this aluminum-bodied nailer handles everything from 3/4” to 1-3/4” coil roofing nails without the constant maintenance headaches that plague cheaper alternatives.
Max engineered the original roofing nailer technology, and the CN445R3 shows why they still lead. The nose magnet holds the last nail to prevent jamming — a simple solution to the infuriating last-nail jam that costs contractors time on every coil change. The full round-head driver blade ensures proper nail seating even in Montana’s temperature extremes.
Core Performance Specifications
The CN445R3 operates across a 70-120 PSI range, handling Montana’s elevation variations from the Flathead Valley to Great Falls without adjustment hassles. Air consumption runs 0.047 cu-ft at 90-100 PSI — efficient enough that standard jobsite compressors keep up even during rapid-fire shingle installation.
| Specification | Value |
|---|---|
| Weight | 5.2 lbs (standard) |
| Operating Pressure | 70 to 120 PSI |
| Air Consumption | 0.047 cu-ft @ 90-100 psi |
| Magazine Capacity | 120 nails |
| Nail Range | 3/4” to 1-3/4” |
| Nail Diameter | 0.120” |
| Fastener Type | 15° wire-collated roofing nails |
| Air Inlet | 1/4” NPT with 360-degree swivel |
| Dimensions | 10-1/2” (H) x 4-1/2” (W) x 12-3/16” (L) |
The aluminum housing resists corrosion through Montana’s wet springs and temperature swings. Contact actuation comes standard for rapid-fire production work, though contractors who prefer sequential firing need to buy that kit separately.
What Sets the CN445R3 Apart
The tar-resistant nose technology addresses the single biggest maintenance complaint in roofing nailers. Montana crews working through summer heat watch standard nailers gum up with melted tar buildup. The removable contact foot means cleaning happens without harsh chemicals or extended downtime.
Max’s patented self-cleaning end-cap filter automatically ejects debris when you disconnect the air hose. No disassembly. No replacement filters. The system just works, season after season. This filter system traps foreign substances while maintaining consistent airflow — critical when you’re racing weather windows.
The nose magnet solves another persistent annoyance. That last nail in the coil typically jams when there’s nothing behind it to drive against. Max’s magnetic retention keeps it positioned correctly until fired. Small detail. Big difference in daily use.
Real-World Applications
Beyond standard asphalt and fiberglass shingle installation, the CN445R3 handles siding (with the optional CN70433 vinyl siding attachment), lath wire to plywood, wooden box assembly, and metal-to-wood fastening. Montana contractors use it for everything from basic three-tab replacement to architectural shingle installation on high-end mountain homes.
Depth adjustment happens through a simple dial system — no allen wrenches or fumbling with shims. Set it once for your shingle type and nail length, then forget about it.
Bottom Line for Montana Contractors
Roofing professionals report performance lasting over 15 years with proper maintenance. That longevity matters when the nearest warranty service center sits hours away. The five-year limited manufacturer warranty backs up the durability claims.
The CN445R3 costs more than entry-level alternatives. But factor in the 8x longer tar-resistant nose life, the maintenance-free filter, and the jam-preventing nose magnet — the math works for crews who measure tool cost per shingle fired, not just the price tag.
The package includes the nailer, 360-degree swivel fitting (factory installed), safety glasses, wrench, and owner’s manual. Trigger lock engages for transport and storage — required given how these tools bounce around in contractor trucks on Montana’s frost-heaved roads.
FAQ
What nail angles does the CN445R3 accept? The nailer uses 15-degree wire-collated roofing nails exclusively. Nail diameter must be 0.120” (11 gauge) with broad heads.
Can this nailer handle siding installation? Yes, with the optional MAX CN70433 Vinyl Siding Attachment. The nailer handles siding installation along with its primary roofing applications.
How does the tar-resistant nose compare to standard designs? The tar-resistant nose lasts 8x longer than conventional tools. The removable contact foot allows cleaning without corrosive chemicals when buildup eventually occurs.
What compressor requirements should contractors plan for? The nailer operates from 70 to 120 PSI and consumes 0.047 cu-ft at 90-100 PSI. Standard jobsite compressors handle it fine, even during continuous use.
Does the warranty cover normal wear items? Max provides a five-year limited manufacturer warranty. Specific coverage details for wear items like driver blades and o-rings aren’t detailed in available documentation.
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