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A bigger mill to tackle larger logs and heavier jobs.

The OS31 delivers the power and capacity to process logs up to 31 inches in diameter. Engineered with time-saving innovations like the patented Auto-Locking Saw head and EZ Blade Tension to guarantee ease of use and straightforward operation.

The standard track cuts boards up to 11', with optional 7' extensions available for longer logs. Stainless steel bunk caps prevent staining of valuable hardwoods. A cam dog secures squared beams and boards quickly, along with a log dog and two sets of long and short log posts.

Operate at ground level with included levelling feet or elevate your log deck for a more comfortable working height with optional levelling legs. Customize the OS31 with a mobility towing kit, log loading system, and track extension options. You don't have to be a full-time pro sawyer to appreciate the capabilities of a machine that can do more.


  • Auto-Locking Sawhead
  • 9/8", 8/4", 6/4", 1"
  • 3/4" Set Display
  • EZ Blade Tension System
  • Adjustable Blade Guide
  • Manual Blade Lube System
  • Log Dogging Clamp (x1)
  • Long and Short Log Rest (x2)
  • Cam Dog (x1)
  • Stainless Steel Bunk Caps (x3)
  • Levelling Feet (x10)

Load and roll logs onto your Frontier sawmill more easily and securely with the winch and ramp options. Pass the winch cable over and around the log, connect it to the log deck frame, and operate the winch to roll the log up the ramps onto the bed. This system also makes rotating the log on the bed easy and securely holds the log for dogging. It enables one person to operate the mill alone with ease.

The patented infinitely-adjustable auto-locking saw head offers precise depth-of-cut control, simplifying your cutting process and saving time. One turn of the crank equals 1 inch of blade height adjustment.

The patented EZ Blade Tension systems allows for frustration-free blades changes by preserving critical bandwheel alignment when you tension the blade. When blade tensioning is easy your band blade changes are fast, allowing for more time milling.

The patented auto-locking adjustable blade guide allows you to make the blade width narrower and therefore more controlled on smaller cuts. This fast single-action system lets you quickly adjust the cut width to keep the exposed blade well supported while cutting various sized material, improving stability and reducing blade wander.

The OS31 sawmill includes one log dog clamp, 2 sets of long and short log rests, a low-profile cam-dog system and built in cant stops allowing for cuts down to 1" above the log bed. Included stainless steel bunk caps protect valuable lumber from staining during the milling process.

Equipped standard with stainless-steel bunk caps to prevent staining of your valuable hardwoods. Iron staining can produce dark or black stains on the wood's surface as a result of a chemical reaction between the tannins in certain woods and the iron in exposed steel. The stainless steel covers provide a protective, corrosion-resistant layer that helps keep your valuable wood from coming into direct contact with the steel components.


With every Frontier sawmill, you receive a one-year consumer warranty. We will repair or replace, at our discretion, any part returned to us and found to be defective through manufacturing within the first year of the original purchaser’s ownership (except consumable items like belts, blades, bearings & clutch). The engine is covered under warranty directly with the engine manufacturer (two years by Briggs and three years with by Kohler). We back that up with a 30-day money-back guarantee. If your Frontier doesn’t do everything we say, simply return it to us within 30 days and receive a refund (shipping not included)*. *Not including used blades, damaged parts or restocking fees.

The saw head is pre-assembled at the factory, and thanks to the fully illustrated step-by-step manual with exploded illustrations, diagrams, and photographs, the rest can usually be put together in a single day. You'll only need a few basic tools, including combination and Allen wrenches, a ratchet with SAE and SI sockets, an adjustable wrench, a Phillips screwdriver, a drill, lubricating and engine oils, and a grease gun. Regardless of your skill level, Frontier Sawmills are designed to be user-friendly and easy to operate. We also provide toll-free support from the moment your Frontier Sawmill arrives, through your first cuts, and beyond.

Some sawyers have their own tractors or loaders. If you don't have access to such equipment, you have the option to enhance your setup with the available log loading systems designed for the Frontier OS31. This includes a ramp package for efficiently moving logs onto an elevated sawmill bed. To further streamline the process, you can complement it with a log winching system. This system facilitates the movement of logs onto the sawmill bed and includes a log turning hook for rotating heavy logs and cants and hold them firmly against the log posts for dogging.

Standard, the OS31 band sawmill log bed is 14 feet long (4.3 m), which allows you to makes cuts up to 11 ft (3.4 m) in length. To saw longer material, you can add optional 7 ft (2.1 m) log deck extensions. You can add multiple extensions in stationary configuration to cut logs of any length. If you want to add the mobility towing system to your Frontier, you can still add one 7 foot bed extension and have it supported with the mobility sub-frame extension kit.

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whatever the enquiry. Give us a call or fill in our contact form.

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