Stanley No. 40 Scrub Plane – The Heavy-Cutting, Fast-Stock-Removal Plane for Rough Dimensioning

1. Introduction

The Stanley No. 40 Scrub Plane is a rugged, straightforward woodworking plane designed for rapid stock removal, rough dimensioning, and aggressive flattening of boards. Featuring a heavily cambered iron, a narrow body, and a wide mouth opening, the No. 40 excels at taking deep cuts and hogging off material quickly—even on rough, twisted, or uneven lumber.

Before power jointers and planers became common, the scrub plane was a vital part of every woodshop’s toolkit. Today, hand-tool woodworkers, chairmakers, timber framers, and traditional cabinetmakers still rely on the No. 40 for fast, controlled shaping and pre-flattening tasks.

This article provides a complete overview of the Stanley No. 40 Scrub Plane—including history, features, restoration, usage, and collector value.

2. History of the Stanley No. 40 Plane

The No. 40 emerged in the late 19th century as Stanley’s dedicated solution for coarse woodworking operations—tasks that are too heavy for standard bench planes.

Historical Highlights

Introduced around 1896–1898
Designed to quickly reduce thickness and flatten rough-sawn boards
Narrow body focused cutting force for deep shavings
Extremely popular before powered machinery became common
Sweetheart-era examples are highly valued
Remained in production into the mid–20th century
Often paired with the broader No. 40½

Because of its simplicity and durability, the No. 40 is still used by traditional woodworkers today.

3. Manufacturer Background – Stanley Rule & Level / Stanley Works

Stanley, established in 1843, offered a vast catalog of specialty planes designed for every woodworking task—including rough stock preparation. The No. 40 reflects Stanley’s commitment to producing durable, efficient tools designed to withstand demanding workloads.

Stanley Quality Characteristics in the No. 40

Heavy-duty cast-iron body
Simple, robust frog and lever-cap system
Thick, strongly cambered cutter
Wide throat opening to handle deep shavings
Ergonomic tote and knob for high-force planing

The No. 40 is one of Stanley’s toughest and most utilitarian planes.

4. Design and Features of the Stanley No. 40 Scrub Plane

Every part of the No. 40 is designed for aggressive, heavy cutting.

Specifications

Length: approx. 10½ inches
Iron width: approx. 1¼ inches
Body material: cast iron
Blade orientation: bevel-down
Mouth: very wide for deep shavings
Weight: approx. 2¾ lbs

Core Features

Strongly cambered iron (typically a 3″–5″ radius curve)
Narrow body to concentrate force and reduce resistance
Large mouth opening to prevent clogging
High-torque frog and lever cap to withstand heavy cuts
Forward-angled tote for maximum pushing power
Simple, rugged construction ideal for harsh workloads

Why the No. 40 Works So Well

Removes large amounts of material quickly
Ideal for rough boards, twists, and high spots
Forgiving on rough, dirty, or imperfect wood
Excellent for prepping boards before flattening with a jack or jointer plane

No plane excels at raw wood removal as efficiently as the No. 40.

5. Usage & Applications

The No. 40 is not a smoothing plane—it is a roughing tool used at the beginning of the hand-tool workflow.

Ideal Uses

Rapid thickness reduction
Initial flattening of cupped or twisted boards
Removing rough sawmill marks
Working across or diagonal to the grain
Preparing stock for jack, jointer, or fore plane work
Shaping interior curves or organic forms (chairmaking)
Timber framing and carpentry requiring fast material removal

Technique Tips

Use diagonal strokes for highest efficiency
Let the cambered iron prevent deep tracks
Follow with a jack plane for leveling
Ideal for green wood and softwoods

The No. 40 is the first plane used when preparing rough lumber by hand.

6. Restoration of a Stanley No. 40 Plane

The No. 40’s straightforward construction makes it easy to restore.

Typical Restoration Steps

Disassemble the plane completely
Remove rust with Evapo-Rust or a citric acid bath
Clean the frog seat and mating surfaces
Lap the sole lightly—flatness is not critical for scrub planes
Regrind and sharpen the cambered blade
Lubricate adjusters and screws
Preserve japanning whenever possible
Reassemble and test on rough stock

Optional Upgrades

Hock or Veritas replacement blade
Honing a smoother camber for specific woods

Restoration Mistakes to Avoid

Making the sole too flat (slight convexity can help)
Incorrect camber shape (must be deep, smooth, and continuous)
Over-polishing or removing original japanning
Tightening the frog too far forward, reducing mouth opening

A well-tuned No. 40 becomes a fast, efficient wood-eating machine.

7. Collectability & Value

The No. 40 is popular among both collectors and users due to its durability and performance.

Typical Value Range

User-grade: $55–$90
Good condition: $90–$150
Sweetheart-era: $150–$225
Excellent or restored examples: $225–$300+

Value Factors

Sweetheart or early logo iron
Japanning condition
Original rosewood tote and knob
Type and era
Mouth condition (chips reduce value)
Iron thickness and originality

The No. 40 is one of the most desirable scrub planes for hand-tool users.

8. Finding Manuals, Parts & Additional Resources

Documentation Sources

Stanley type-study references
VintageMachinery.org
Blood & Gore by Patrick Leach
Original Stanley catalogs
Stanley Collectors Club publications

Replacement Parts

Hock Tools and Veritas blades
Reproduction totes & knobs (rosewood or beech)
eBay or tool forums for frogs, lever caps, screws

Parts are plentiful thanks to the plane’s long production run.

9. Final Thoughts

The Stanley No. 40 Scrub Plane is a legendary roughing tool that has stood the test of time. Its aggressive cambered iron, narrow body, and wide mouth make it the perfect plane for rapid stock removal, the first step in hand-tool lumber preparation. Rugged, efficient, and surprisingly enjoyable to use, the No. 40 remains a favorite for both traditional craftspeople and modern woodworking enthusiasts.

Collectors appreciate its simplicity and history; woodworkers rely on its unmatched ability to tame rough wood quickly.

Quick Reference Summary

Category	Details
Model	Stanley No. 40 Scrub Plane
Manufacturer	Stanley Rule & Level / Stanley Works
Era	1896–Mid 20th Century
Length / Iron	~10½″ / ~1¼″
Key Feature	Strong cambered iron for deep cuts
Best Uses	Roughing, stock removal, curve shaping
Rarity	Common–Moderate (depending on era)
Typical Value	$55–$300+
Restoration Difficulty	Easy
Collectability	Strong for users; moderate for collectors

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