Metal Working

Large Diameter Tap and Die Set

Most threading jobs are for thread sizes 1/2″ in diameter or smaller. Larger thread sizes are typically encountered when installing or maintaining machinery or repairing farm equipment. If you are a tradesman, large equipment mechanic, metal fabricator, mill wright, or maintenance person a Large Diameter Tap and Die Set is a must-have item for getting the job done as quickly and efficiently as possible.

Large diameter threading tools are expensive, especially when purchased individually. And waiting until a threading job comes along to go ahead an order the appropriate size tap or die can hold up an entire project. But finding the right set with the correct range of large taps and dies takes up time when you need to be working.

I already taken the time to do the research and tracked down some quality large diameter tap and die sets.

Why Should You Consider my Advice?

As a veteran machinist/toolmaker I have a lot of familiarity with all types of threads and thread sizes as well as the tools used to create them. I have hands-on experience using all sizes of threading tools so I know what features work best.

My Recommendations

Here are some sets with Large Diameter taps and dies up to 1″ and/or 18mm for you to take a look at. Depending on your particular requirements there are both SAE and Metric thread series to choose from.

I have evaluated all of the customer reviews to make sure they are legitimate and reflect the customer’s true experience with the product.

I’ve included both professional grade sets for commercial use and less expensive budget sets for occasional use. Each of the sets BELOW will cut proper fitting threads and should provide many years of service when used correctly.

ProTip: The biggest cause of a broken tap or die is from not using a quality thread cutting oil or fluid such as Tap Magic.  This product acts as a lubricant that increases tool life.  It dramatically reduces the possibility of tap breakage, and produces cleaner, better finished threads with less effort.

#1Greenfield Threading 423005 Plug Tap and Adjustable Round Die Set 32 HSS/Carbon Uncoated (Bright) Coating Right Cut 47-Piece
Greenfield Threading 423005 Plug Tap and Adjustable Round Die Set 32 HSS/Carbon Uncoated (Bright) Coating Right Cut 47-Piece
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#2Neiko 00916A SAE Pro-Grade Large-Diameter Titanium Tap & Die Set (45 Piece)
Neiko 00916A SAE Pro-Grade Large-Diameter Titanium Tap & Die Set (45 Piece)
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#3Happybuy 110Pcs Tap & Die Set Tungsten Steel Titanium Tap & Die Metric Tool Tap & Die Combination Set For Cutting External & Internal Threads
Happybuy 110Pcs Tap & Die Set Tungsten Steel Titanium Tap & Die Metric Tool Tap & Die Combination Set For Cutting External & Internal Threads
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#4HHIP 1011-0003 45 Piece Tap & Die Set 1/4-1 Inch - Tin Coated
HHIP 1011-0003 45 Piece Tap & Die Set 1/4-1 Inch – Tin Coated
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#5Standard Metric Bearing Steel Tap and Die Rethread Set 110 Piece Engineers Kit Screw Bolt Cutter for Cutting External and Internal Threads with Storage Case by Mostbest (Red)
Standard Metric Bearing Steel Tap and Die Rethread Set 110 Piece Engineers Kit Screw Bolt Cutter for Cutting External and Internal Threads with Storage Case by Mostbest (Red)
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