Starrett 505A-12 ProSite 12-Inch Dial Protractor

Starrett 505A-12 ProSite 12-Inch Dial Protractor
by Starrett

Starrett 505A-12 ProSite 12-Inch Dial Protractor List Price: $63.00
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Product Details

Manufacturer: Starrett
Model: 505A-12
Product features:
  • 12-inch miter saw protractor with two scales--red "miter cut" scale and black "single cut" scale
  • Allows direct transfer of the work angle to the miter saw in 3 steps with no calculations
  • Durable 1/4-inch thick aluminum alloy; Teflon O-ring for smooth, precise operation
  • 7-inch version also
  • 12-inches long; 1-1/2 pounds; 1-year warranty
  • Ideal for carpenters, plumbers and all building trades
  • Saves time and reduces waste
  • Scale shows angle for a miter joint and single cut
  • Takes error-prone calculations out of miter cuts
  • Upside down or backwards, the reading is always correct
Accessories:

Tools and Hardware Reviews of Starrett 505A-12 ProSite 12-Inch Dial Protractor

Customer Review: Starrett 505A 12 Pro Site 12 Inch Dial Protractor
Summary: 4 Stars

Many homeowners I know who attempt basic trim work become very disappointed when their inside or outside miter joints are "open" requiring wood filler or caulking to make the joint acceptable.

They can't understand why their $300.00 plus miter saw is making such poor cuts. After all, most miter saws have a "stop" setting at the 45 degree angle. The problem (generally) isn't the home owner or miter saw's fault. The fact is, 95% of all outside or inside corners in our homes are not 90 degrees (or whatever angle they're supposed to be). They may have been close to the desired angle when the house was built, however over time, as the house framing drys out and shrinks, and/or settles on its foundation, the corner angles within the home change. Also sloppy sheet rock installation takes perfectly framed corners out of spec. In reality, they're more like 87, 88, 89, 91, and so on, degrees. For example is the outside corner is 88 degrees, the miter saw would be set at 44 degrees for a tight joint. A 45 degree cut would leave an open joint requiring wood filler.

The Starrett tool will correctly calculate the angle and indicate the correct miter saw angle. Personally I really don't need to have the tool tell me to cut 45 degree angles for a 90 degree corner -- Fortunately I'm still able to divide by two.

The tool extremely durable, made of what appears to be cast Aluminum. The scale however, a vital part of the tool appears to be a plastic covered paper sticker that scratches easily and over time will fade. Maybe that's why some people report the tool be "off" as much as 1 degree - the label wasn't placed on the tool properly.

For this price, I would expect a grid scale notched into the aluminum housing or at minimum a higher quality scale.

Non the less, it is a very useful tool if you do basic trim work.

For Crown molding I use the Bosch DWM40LK Miter Finder Digital Protractor/Angle Kit which calculates the correct miter saw angle and bevel based upon the corner angle (and Crown Spring) allowing me to lay the crown mounding flat in the miter saw for the cut. I'll rate that tool separately.

All in all, despite some issues with scale label quality, I recommend this tool for anyone doing basic molding jobs.

One additional piece of advice - When you receive the tool, hold it up against a framing square to make sure the tool is correctly indicating a 90 degree angle.

Description of Starrett 505A-12 ProSite 12-Inch Dial Protractor

Durable 1/4" aluminum with Teflon O-ring for smooth, precise operation, 12" model available with identical dial and functionality, Optional leather holster available for 12" models.
No miter saw is complete without this patented and multiple award winning invention. This is the original and very popular 12-inch model of the Starrett ProSite Miter Saw Protractor. It is now also available in the conveniently smaller-sized 7-inch model, the 505A-7.

The Starrett ProSite Miter Saw Protractor takes error-prone calculations out of the process of miter cuts and other angle cuts. Simply set your saw to the angle that you read on the tool. There are absolutely no calculations. Upside down or backwards, the reading is always correct. These easy-to-use tools have two scales. The red scale and red "Miter Cut" arrow provide the exact miter saw setting for a perfect miter joint, while the black scale and black "Single Cut" arrow provide the exact miter saw setting for fitting a single workpiece to any angle.

The ProSite Miter Saw Protractors save time and reduce waste. They are ideal for carpenters, plumbers, and all building trades which require the measuring and transferring of angles. They are also invaluable for home use and do-it-yourselfers. They are the perfect and essential companion for every miter saw user. Buy both models and cover all your angles!


Starrett's award-winning ProSite 505A-12 12-Inch Miter Saw Protractor is ideal for anyone who regularly measures and transfers angles, from professional plumbers and carpenters to weekend craftspeople. This protractor eliminates the need for tricky, error-prone calculations. You simply read the angle on the protractor and set your saw to that angle to achieve perfect miter cuts and other angled cuts.




An easy-to-read dial makes the ProSite® protractor simple to work with. View larger.


Simply read the angle on the protractor and transfer to your saw for perfect miter cuts. View larger.
Easy to Use for Error-Free Measurements
Measuring accurate angles and making accurate cuts saves you time, reduces the amount of material that you waste, and helps you get jobs done quickly and efficiently. That's where precision tools like the ProSite Miter Saw Protractor come in.

Featuring a patented, easy-to-use design, this tool offers two scales for quick reference. The scales have been laser engraved for exceptional accuracy with each measurement. The miter cut arrow shows the required angle for crafting a precise miter joint, while the single cut arrow provides you with the angle needed to fit a single work piece to an existing angle. The protractor gives you correct measurements every time, even when you're viewing your work piece backwards or upside down.

As durable as it is convenient, this protractor features machined aluminum legs and an adjustable friction pivot. Starrett also makes the smaller 505A-7, a convenient seven-inch protractor featuring the same easy-to-read dial and dependable construction, and the CP505A-12, a combination protractor that features a conversion table for use with compound miter saws plus a reference guide for working with common roof pitches.

About the L.S. Starrett Company: 115 Years of Experience
Tracing its roots back to the invention of the combination square by Laroy S. Starrett in 1877, the L.S. Starrett Company has a long history of creating innovative, high-quality tools.

Used by everyone from tradesmen and small machine shops to Fortune 500 firms, their wide range of current products includes precision tools like micrometers and calipers alongside technologically advanced tools like optical measuring projectors and electronic gauges. Starrett is also a leading producer of saw blades.

What's in the Box
505A-12 ProSite 12-Inch Dial Protractor.

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