Now featuring ArmorGlide Technology, the Powermatic 1285T 12" Jointer offers big capacity and performance in a machine loaded with features. A large center-mounted fence assembly adjusts easily by a rack and pinion system with ram lock. Preset stops on the fence body allow for fast angle set-up at 45° in and out, and a positive stop for perfect 90° angles.
The parallelogram design keeps the table in close proximity to the cutterhead for improved finish and allows for a fast depth of cut adjustment. This design also ensures the tables remain perfectly parallel even after years of tough duty. This model features a helical cutterhead.
Enhanced visibility:The dark surface reduces glare, so you can see where you're cutting better.
Rust resistant:Ditch the steel wool and never worry about rust again.
Low friction:Coated tables require 50% less force, so you get more control.
Maintenance-free:Get rid of the waxes and messy cleaning supplies, so you can do more of what you love.
Durable coating:ArmorGlide tables can withstand 250,000 passes without showing signs of wear.
Features
ArmorGlide Technology gives you a low-friction, industrial-grade coating on the work surface that is rust resistant, requires less maintenance, and gives you more control
Helical cutterhead features 42 two-sided carbide inserts for fast knife changes with no adjustments and a quiet, clean cut
Large 12" x 84" precision ground cast iron table surface for heavy-duty work
Parallelogram design ensures close table-to-cutterhead proximity and fast depth of cut adjustments
Rack and pinion adjustable cast iron fence assembly allows for smooth fence positioning without play
Table "lips" on both sides of cutterhead aid in noise reduction
Specifications
Style (Type)
Planer / Cutterhead Machine
Cutterhead Speed
5,000 RPM
Cutting Capacity (W × D)
11-3/4" × 3/4"
Motor Power
3 HP
Motor Voltage
230V
Number of Knives
44
Dust Port Outside Diameter
4"
Min. Dust Collection Required
800 CFM
Recommended Circuit Size
30 Amps
Video
What our Experts Think
The Powermatic 12" Parallelogram Helical Cutterhead Jointer with ArmorGlide 3HP 3PH 230V - PM1-1791308T is a professional-grade jointer designed for precision edge preparation, powerful performance, and long-term reliability.
The 3HP three-phase motor provides consistent power for demanding woodworking operations, making it suitable for hardwoods, large stock, and production environments.
The helical cutterhead with 42 two-sided carbide inserts delivers quieter operation, smoother cuts, reduced tear-out, and longer-lasting cutting performance.
The ArmorGlide table coating reduces friction, improves board movement, and helps protect the cast iron surface from corrosion.
The 12" x 84" precision-ground cast iron table provides excellent support for large boards while helping maintain accurate jointing results.
The parallelogram table design keeps the tables aligned with the cutterhead, allowing smoother adjustments and consistent performance over time.
The rack-and-pinion adjustable fence with preset stops makes setup faster and helps achieve repeatable 90° and bevel cuts.
The heavy cast iron construction minimizes vibration, improving stability, control, and overall finish quality during operation.
Expert verdict: A premium 12" jointer built for serious woodworkers who need maximum accuracy, powerful cutting ability, and professional-level durability
Q&A
Q: What is the Powermatic 12" Parallelogram Helical Cutterhead Jointer? A: The Powermatic PM1-1791308T is a professional 12-inch jointer designed for flattening boards, edge jointing, and precision woodworking applications.
Q: What motor does the PM1-1791308T use? A: It features a powerful 3 HP, 3-phase, 230V motor built for consistent performance in demanding woodworking shops.
Q: What is the benefit of the helical cutterhead? A: The helical cutterhead uses carbide inserts to deliver smoother cuts, reduced tear-out, quieter operation, and longer cutter life.
Q: What is the jointing capacity of this machine? A: It offers a 12-inch cutting width with a large 84-inch precision-ground cast iron table for handling long boards.
Q: What is ArmorGlide technology? A: ArmorGlide provides a low-friction, rust-resistant table surface that helps improve material movement and reduce maintenance.
Q: Does it have a parallelogram table design? A: Yes, the parallelogram table system keeps the tables aligned with the cutterhead for accurate adjustments and consistent results.
Q: Does the fence offer precise adjustments? A: Yes, the rack-and-pinion adjustable fence allows smooth positioning with repeatable angle setups.
Q: Does it support dust collection? A: Yes, it includes a 4-inch dust port for efficient chip and dust removal.
Q: Is the PM1-1791308T suitable for professional workshops? A: Yes, its heavy-duty construction, large capacity, and helical cutterhead make it ideal for production woodworking environments.
Q: Why choose the Powermatic 12" Helical Jointer? A: It combines industrial power, precision alignment, ArmorGlide technology, and smooth helical cutting performance for professional woodworking results.
Maintenance Tips
Clean sawdust, chips, and debris regularly from the cutterhead, tables, fence, and dust port.
Keep the ArmorGlide table surface clean and protected to maintain smooth stock feeding.
Inspect the helical cutterhead inserts regularly and rotate or replace worn inserts when needed.
Keep the cast iron fence and tables dry to help prevent rust and maintain accuracy.
Check and adjust fence alignment, table settings, and cutterhead setup for precise jointing.
Maintain proper dust collection to reduce internal buildup and improve airflow.
Lubricate moving parts and adjustment mechanisms for smooth operation.
Inspect belts, motor components, switches, and electrical connections for wear.
Tighten bolts, handles, and hardware regularly to minimize vibration.
Store the jointer in a clean, dry workshop environment to prevent corrosion.
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