OS31 Portable Sawmill

OS31 Portable Sawmill

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$2,599.00
$2,599.00
$3,499.00 Save 25% Sold out
Tax included.
Engine Type: 13½ hp (420cc) Briggs & Stratton (recoil start) Engine

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Processing: 5–8 business days to verify, allocate, and book the carrier.


Transit (U.S.): Free shipping; typical delivery 8–12 business days after dispatch.


Freight (LTL): Free professional unloading included. Carrier may call to schedule a delivery window—please provide a reachable phone number.


Tracking: Sent by email once dispatched (events can take up to 24h to appear).


On delivery: Inspect packaging before signing; note visible damage on the receipt and take photos. Report issues within 5 business days.

RETURNS & REFUNDS

Easy returns: 30-day free return (U.S.) for items in original condition/packaging.


Start a return: Email Support@forestlyequipments.com for an RMA and prepaid label. Unauthorized returns may be refused.


Packing: Use original packaging; secure freight items to a pallet. Drain fuels and let vent 24h before transport (if applicable).


Refund timing: Issued to the original payment method within 5 business days after the return is received & inspected (bank times may vary).


Non-returnable: Used/installed/modified items, missing parts/packaging, opened consumables (unless DOA), items returned with fuel.

WARRANTY

  • Coverage: Limited warranty for 3 years commercial Kohler manufacturer's warranty against defects in materials & workmanship under normal use.
  • What we do: At our discretion we’ll repair, supply parts, replace, or credit the item.
  • Exclusions: Normal wear items (e.g., blades, belts, oils), damage from misuse, alterations, or improper setup.
  • How to claim: Email Support@forestlyequipments.com with order #, description, and photos/video. We’ll guide next steps (parts-in-field, service, or replacement).
  • Docs: Keep original packaging & manuals for easier service.
View full details
Selected Variant Image
OS31 Portable Sawmill
13½ hp (420cc) Briggs & Stratton (recoil start) Engine
$2,599.00
$3,499.00 $2,599.00
Selected Variant Image
OS31 Portable Sawmill
13½ hp (420cc) Briggs & Stratton (recoil start) Engine
$2,599.00
$3,499.00 $2,599.00

Bundles

  • Mobility Towing Kit for OS23, OS27 & OS31 with 6 Support Jacks

    Mobility Towing Kit for OS23, OS27 & OS31 with 6 Support Jacks

    Mobility Towing Kit for OS23, OS27 & OS31 with 6 Support Jacks

    $1,499.00
    $1,499.00
  • Log Loading Ramp Package

    Log Loading Ramp Package

    Log Loading Ramp Package

    $0.00
    $0.00
  • Auto Blade Lube System

    Auto Blade Lube System

    Auto Blade Lube System

    $115.00
    $115.00
  • Manual Log Loading Bundle with Toe Board for OS23, OS27 & OS31

    Manual Log Loading Bundle with Toe Board for OS23, OS27 & OS31

    • Save 12%

    Manual Log Loading Bundle with Toe Board for OS23, OS27 & OS31

    $699.00
    $799.00 $699.00
    Save [%]
  • Blades and Deluxe Maintenance Bundle for OS31

    Blades and Deluxe Maintenance Bundle for OS31

    • Save 12%

    Blades and Deluxe Maintenance Bundle for OS31

    $349.00
    $399.00 $349.00
    Save [%]
  • Track Extension Bundle with Mobility Sub-Frame Ext for OS31

    Track Extension Bundle with Mobility Sub-Frame Ext for OS31

    • Save 25%

    Track Extension Bundle with Mobility Sub-Frame Ext for OS31

    $599.00
    $799.00 $599.00
    Save [%]
  • Mobility Towing Bundle with 7' Track Extension for OS31

    Mobility Towing Bundle with 7' Track Extension for OS31

    • Sold out

    Mobility Towing Bundle with 7' Track Extension for OS31

    $1,999.00
    $2,799.00 $1,999.00
    Sold out
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  • Description

  • Whats Included

Introducing the revamped workhorse: The tried-and-true Frontier Sawmill returns with a bold, new look, maintaining its robust construction.

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 Sawhead 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. Operate at ground level with included leveling feet or elevate your log deck for a more comfortable working height with optional leveling 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)
  • Stainless Steel Bunk Caps (x3)
  • Leveling Feet (x10)

Product Highlights OS31 Sawmill

Auto-Locking Sawhead

The patented infinitely-adjustable auto-locking sawhead 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.

Versatile log clamps

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.

EZ Blade Tension

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.

Adjustable Blade Guide

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.

Stainless Steel Bunk Caps

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.

Ramp up your sawmill with a log loading system

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 sawmill alone with ease.

Add mobility and tow it right to your milling site

For sawyers working in multiple locations, you can tow the OS31 right to your milling site with the optional mobility kit and jack support package. This option includes the mobility subframe, axle, 12-inch wheels with quick release steel fenders, removable drawbar, six adjustable support jacks, and the carriage lockdown system. Add the mobility kit now, or upgrade your mill in the future when the time is right for you.

OS31 Portable Sawmill — PRODUCT YOU ARE VIEWING

A bigger portable sawmill to tackle larger logs and heavier jobs.

Price: $3,467

Log diameter
31" (79 cm)
Width of cut
23" (59 cm)
Depth of cut
7.25" (18 cm)
Max horsepower
14 hp
Log length
11' (3.4 m) + optional track extensions
Additional track extensions
7' (2.1 m)
Power options
13½ hp (420 cc) Briggs recoil start gas • 14 hp (429 cc) Kohler electric start gas
Blade size
144” (3660 mm) × 1.25" (32 mm) SabreTooth
Bandwheels
19” (48 cm) cast-iron
Depth of cut scale
9/8", 8/4", 6/4", 4/4" and 3/4"
Variable depth selection
Fixed & adjustable
Patented adjustable blade guide
Yes
Blade guide system
Machined pillow-block with rear-thrust bearing
Blade guides
Machined with sealed bearings
Blade lube reservoir
3.2 Gal (12 litres)
Patented auto lube system
Optional
Blade engagement
Centrifugal clutch
EZ blade tension
Yes
Patented laminated sawhead
Rigid 4-post with laminated lower frames
Chip extractor compatible sawdust exhaust chute
Yes
Carriage configuration
Rigid 4-post
Carriage wheels
Machined with sealed bearings
Log rests
Long and short (×2)
Log dog clamp / Cam dog
Screw-dog (×1)
Stainless steel bunk caps
Yes
Leveling feet
Optional
Leveling legs
Optional
Mobility towing kit
Optional
Moving kit with wheels & handle
Optional
Track length
14' (4.3 m)
Track width
37" (94 cm)
Saw carriage width
74.5" (189 cm)
Finish
Powder-coat & zinc-plated

Specs are subject to change. Optional kits and extensions sold separately.

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