Lignum vitae wood comes from trees of the genus Guaiacum, native to Central America and northern South America. The name “lignum vitae” means “wood of life” in Latin, which refers to the durability and hardness of the wood.
What is Lignum Vitae Wood?
Lignum vitae is one of the world’s hardest and most durable woods. It is famous for its excellent strength and durability. It is used for shipbuilding, bearings, and tool handles.
Lignum vitae is also highly resistant to water and rot, making it useful in marine environments. The wood is also known for its beautiful dark green color and attractive grain pattern.
| # | Lignum Vitae Wood |
|---|---|
| Scientific name | Guaiacum officinale and G. sanctum |
| Tree Size | 30–40 feet (10–13 m), 1–2 ft (0.3–0.6 m) trunk diameter |
| Dry weight | 78.5 lbs/ft3 (1,260 kg/m3) |
| Janka Hardness | 4,390 lbf (19,510 N) |
| Modulus of Rupture: | 17,970 lbf/in2 (123.9 MPa) |
| Crushing Strength: | 12,380 lbf/in2 (85.4 MPa) |
| Shrinkage: Radial: | 5.3%, Tangential: 8.7%, Volumetric: 14.0%, T/R Ratio: 1.6 |
Lignum Vitae Uses
Lignum vitae wood is used for shipbuilding, tool handles, bearings, bushings, pulley wheels, and carvings. It can withstand constant exposure to saltwater and moisture, which is why it is most commonly used for marine applications.
Appearance
The heartwood of lignum vitae ranges from greenish-brown to olive, and it can sometimes be darker. The sapwood is light green to greenish, which gives it a distinctive appearance.
When exposed to light and UV rays, the wood tends to darken with age. The color of the wood can be preserved with proper sealing. The wood has a straight or interlocked grain pattern and contains natural oils, making the surface look oily.
Working with Lignum Vitae
Lignum vitae wood is not easy to work with because it is tough, dense, and heavy, especially when using hand tools. Due to its hardness, it can dull cutter blades. You will need sharp tools; carbide-tipped tools or blades are recommended for the best results.
Lignum vitae has a naturally oily surface, making it difficult to glue joints. For the best results, use high-quality epoxy or polyurethane glue.
If you’re working with lignum vitae, wear appropriate safety gear, such as eye protection and gloves, to prevent injury.
Lignum Vitae Wood Pros and Cons
Lignum vitae wood is an excellent wood species, but it has some pros and cons that should be known before use. Its pros and cons are as follows.
Pros
- Appearance: Lignum vitae wood has a unique color, which makes it look great.
- Durability: Lignum vitae is one of the most durable woods in the world, making it very resistant to wear, rot, and insect damage.
- Moisture Resistant: Lignum vitae has a natural oil content that makes it self-lubricating and highly resistant to water, making it a good choice for use in marine environments.
- High Strength: The wood’s high strength makes it ideal for use in applications involving a lot of pressure.
Cons
- Rare and Expensive: Lignum vitae is a rare and slow-growing tree, which makes it more expensive than many other kinds of wood.
- Toxicity: The sawdust of lignum vitae wood can cause allergic reactions and skin irritation in some people. Additionally, the wood contains a toxic resin that can cause problems for people with asthma.
- Difficult to Work: Lignum vitae is tough and heavy, making it difficult to work with machines and hand tools.
Lignum Vitae Wood Price
The price of lignum vitae hardwood depends on several factors, such as its quality, size, and availability. It is expensive because of its natural properties and rarity. Typically, lignum vitae lumber costs range from $40 to $100 per board foot.
It is important to note that lignum vitae is also an endangered species protected by international trade regulations. Before purchasing lignum vitae wood, ensure that it is sourced sustainably and legally.
Why Is Lignum Vitae So Hard?
Lignum vitae is exceptionally hard because it is an extremely dense hardwood with a high natural oil content. Its density and hardness give the wood excellent resistance to wear and make it suitable for demanding applications such as bearings and marine components.
However, these same properties make lignum vitae more difficult to cut, shape, and sand than many other hardwoods.
Why Was Lignum Vitae Used for Shipbuilding?
Lignum vitae has a long history of use in marine applications because of its resistance to water, decay, and wear. Its natural oils also provide self-lubricating properties, which made it particularly useful for components such as marine bearings and bushings.
Its ability to withstand constant moisture exposure made it a valuable material for certain shipbuilding applications.
Lignum Vitae for Woodworking
Lignum vitae can be used for woodworking projects, but its exceptional hardness and density make it more challenging to work with than many common hardwoods.
It is better suited to smaller projects and specialty applications where its durability, natural oils, and unique appearance are important. Sharp, high-quality tools should be used, and extra care should be taken when cutting and shaping the wood.
Lignum Vitae vs. Other Hardwoods
Lignum vitae is considerably harder and denser than most common hardwoods. Its Janka hardness rating of 4,390 lbf (19,510 N) places it among the hardest commercially known woods.
Its exceptional hardness, natural oils, and resistance to moisture and decay make it particularly useful for specialized applications. However, these same characteristics can make it more expensive and difficult to work with than many other hardwoods.
FAQ
Is Lignum Vitae the Hardest Wood?
No, lignum vitae is not the hardest wood in the world, but it is very hard. Its Janka hardness rating is 4,390 lbf (19,510 N).
Here is a table of the hardest woods to give you an idea of how hard lignum vitae is.
| Wood Species | Janka Hardness |
|---|---|
| Quebracho | 4,570 lbf (20,340 N) |
| Lignum Vitae | 4,390 lbf (19,510 N) |
| Australian Buloke | 3,760 lbf (16,740 N)* |
| Verawood | 3,710 lbf (16,520 N) |
| African blackwood | 3,670 lbf (16,320 N) |
| Kingwood | 3,340 lbf (17,240 N) |
| Gaboon Ebony | 3,080 lbf (13,700 N) |
| Cocobolo | 2,960 lbf (14,140 N) |
| Honey Mesquite | 2,340 lbf (10,410 N) |
Is Lignum Vitae Wood Good for Bearings?
Lignum vitae wood is an excellent choice for making bearings because of the presence of natural oils that work as a self-lubricant. As a bearing material, it can work for more than 100 years without using oil or grease.
Is Lignum Vitae Good for Furniture?
Lignum vitae wood can be used for furniture, but it is not recommended for many reasons. First, it is a very expensive wood that is rarely available. The second reason is that it is very heavy. Woodworkers have to face many difficulties while working with this wood. Therefore, it is used for smaller applications, such as tool handles or carvings, rather than for furniture.
Is Lignum Vitae Good for Outdoor Uses?
Lignum vitae can be used outdoors because it can withstand moisture and extreme weather for a long time. It is rot- and insect-resistant, so it does not rot easily even after contact with the ground or moisture.
Is Lignum Vitae Rot-Resistant?
Yes, lignum vitae is naturally highly rot-resistant. It does not need to be treated like many other types of wood.
Is Lignum Vitae Sustainable?
Lignum vitae wood is considered a protected species due to excessive harvesting. This species is listed as “Vulnerable” by the International Union for Conservation of Nature (IUCN), is included in CITES Appendix II, and is on the IUCN Red List. The growth rate of lignum vitae trees is very slow, and the tree may take up to 100 years to reach maturity.