Welcome to our curated selection of Starrett machinist squares, the gold standard in precision measuring tools. These professional-grade instruments, including the Inch Reading Double Square (13A), Toolmakers Stainless Steel Square (3020-6), and Precision Steel Square (3020-4), deliver exceptional accuracy for ensuring perfect 90-degree angles in machining, woodworking, and layout tasks. Whether you're a seasoned machinist or a dedicated DIYer, Starrett's legacy of quality since 1880 makes these squares indispensable for projects demanding reliability and finesse.
Why Starrett Stands Out in Machinist Squares
Starrett has built a reputation for unparalleled craftsmanship, using high-grade materials like hardened steel and stainless steel to create tools that resist wear and maintain tolerances over decades. Unlike generic options, Starrett squares feature satin chrome finishes or polished blades that minimize glare and enhance readability. Their hardened edges ensure lasting squareness, critical for repetitive use in workshops. If you're serious about precision, Starrett outperforms many alternatives, as seen when comparing to brands in our Machinist Squares category.
Key Features to Consider When Choosing a Starrett Machinist Square
Selecting the right Starrett square depends on your needs. Look for blade length, material, graduations, and build quality:
- Blade and Beam Design: Double squares like the 13A offer versatility with blades on both sides of the beam for quick checks.
- Graduations: Inch-reading options with 32nds and 64ths provide fine measurements for intricate work.
- Materials: Satin chrome for corrosion resistance or stainless steel for toolmakers' precision.
- Size and Portability: Compact 4-inch models for bench work or slightly larger for broader layouts.
- Accessories: Fitted cases protect against damage during storage and transport.
These features make Starrett ideal for tasks like checking table saw alignments, joint squaring in cabinetry, or inspecting milled parts. For broader tool options, explore our Measuring & Layout Tools section.
Comparing Starrett Models: Find Your Perfect Fit
Our three standout models cater to different preferences:
The 13A Inch Reading Double Square (4" blade) shines with its satin chrome finish and hardened blade, offering dual-sided measurement for efficiency. Its 32nds-64ths graduations suit detailed inch-based work, making it a favorite for general machining.
For ultimate durability, the 3020-6 Toolmakers Stainless Steel Square features a 5-29/32" blade and 3-29/32" beam, complete with a fitted plastic case. This model excels in professional environments and DIY projects requiring rust-proof performance.
The 3020-4 Precision Steel Square (4" size) delivers high-accuracy for machinists and woodworkers alike, with robust construction that holds up under heavy use. It's compact yet powerful for everyday precision tasks.
Choose the 13A for versatility, 3020-6 for portability with protection, or 3020-4 for straightforward professional reliability. If you're considering alternatives, check out Taytools Machinist Squares or iGaging Machinist Squares for value comparisons within Machinist Squares.
Common Use Cases for Starrett Machinist Squares
These tools are versatile across trades:
- Machining: Verify perpendicularity on lathes, mills, and drill presses.
- Woodworking: Ensure square joints, frames, and cabinet assemblies.
- Metalworking: Layout and check fabricated parts for accuracy.
- DIY Home Improvement: Align shelves, doors, and fixtures with pro-level precision.
Starrett's accuracy, often within 0.001 inches, elevates every project. For more home-focused tools, visit our Tools & Home Improvement category.
Frequently Asked Questions
What makes Starrett machinist squares better than competitors?
Starrett's century-plus heritage ensures superior materials, tighter tolerances, and lifetime durability, outperforming budget brands in longevity and precision.
Which Starrett model should I choose?
Opt for the 13A for double-sided use, 3020-6 for stainless portability, or 3020-4 for compact steel precision: match to your primary tasks.
Does Starrett offer a warranty on machinist squares?
Yes, Starrett provides a satisfaction guarantee and robust customer support, backing their tools with repair or replacement services.
How do I maintain my Starrett square?
Store in its case, avoid dropping, and clean with a soft cloth, hardened blades resist wear but benefit from light oiling.
Are Starrett squares suitable for woodworking?
Absolutely; their accuracy supports woodworkers checking miters, dadoes, and assemblies alongside machinists.
