Thread Check, Inc. provides a complete line of taps, dies, and cutting tools from leading manufacturers. Our sales engineers are pleased to assist you with all your standard and special requirements. 

Thread Check Inc. offers an extensive inventory of standard taps and many specials manufactured within 24 - 48 hrs.

TAPS

• Taper Taps • Semi-Bottoming Taps • CNC Forming Taps • Metric Taps • Nut Taps • Short Projection Pipe Taps • Coolant Fed ( oil hole ) Taps • Taps for Non Metallics • Combination Taps and Drills

• Combination Tap and Reamer • Piloted Taps • Shell Taps • ACME Taps • Pipe Taps • Plug Taps • Special Taps • High Performance Taps • Hand Taps Spiral Pointed Taps

• Spiral Fluted Taps • Maintenance Taps • British Taps • Buttress Taps • Din Standard Tap • Form Taps    • Miniature Taps

DIES

• Hexagon Rethreading Dies    - Carbon Steel • Metric Rethreading Dies • Die Stocks

• Round Adjustable Cutting Dies • Solid Round Cutting Dies • Die Stocks

• Tap Wrenches • Tap and Die Sets • Tap and Drill Sets

DRILLS AND REAMERS

• Jobber Length Drills • Heavy Duty • Fast Spiral • Cobalt • Coated • Bright Finish • Parabolic Screw Machine    Length Drills • Aircraft Extension Drills

• Taper Length Drills • Taper Shank Drills • Silver and Deming Drills • Core Drills • Spotting Drills • Centering Drills • Combined Drills and    Countersinks • Short Length Carbide Tipped • Masonry Drills

• Screw Extractors • Carbide Drills • Jobber Length Drill Sets • Chucking Reamers • Taper Reamers • Taper Pipe Reamers • Taper Pin Reamers • Special Reamers

END MILLS

• Carbide Tipped • Cobalt • Cobalt Powdered Metal • HSS • M2-AL • Powdered Metal • Solid Carbide

• Roughers • End Mill Extensions • Ball End • Turbo Hog and Profiling Mills • Standard • Aluminum Cutting Taps • Corner Radius

• Miniatures • Corner Rounding • Keyway and Straight Flute • Half Rounds • Roughing and Finishing • Tapered • Specials

 

Ordering Taps

Thread Check, Inc. highly recommends that a drawing with the thread information be supplied whenever possible. This will assist our engineering staff in providing the right tap for the job and avoiding long delays and costly problems in manufacturing.

Critical information required to supply the correct tap is as follows:

1. Nominal Size, TPI or Thread Per Inch, Thread Form, and if  the thread is a multiple start.
2. Class of thread to be manufactured – 2B or 3B.
3. Right hand or Left hand thread. Right hand is always assumed if not specified.
4. Material to be tapped.
5. Nature of hole to be tapped.
   1. Drilled, punched, or cast.
   2. Tap drill or hole size.
   3. Depth of hole.
   4. Through hole or blind hole.
   5. Required length of full threads.
6. Style of tap required – Taper, plug, bottoming, gun tap, and spiral fluted tap.
7. Our manufacturing engineer will determine this based on the information supplied.

Any additional information concerning the type and condition of the machine or equipment being used can be helpful in manufacturing the best tap design for the job.

TROUBLE SHOOTING CHECKLIST FOR TAPPING

1. Using an incorrect style or design for the job.
2. Using an incorrect tap limit size for the class of thread.
3. Using dull taps, dies, and cutting tools that require resharpening.
4. Using poorly re-sharpened taps, dies, and cutting tools.
5. The part material is too hard or too soft.
6. The part material is of poor quality and not uniform in structure or analysis.
7. The part material is galled on the tap threads.
8. Over packing of chips in the flutes.
9. Tapping machine is too heavy or too light for job.
10. Tapping machine lacking a quality lead screw.
11. Speed range of tapping machine is too limited.
12. Table of tapping machine or work piece not perpendicular to the tap.
13. CNC machine not properly programmed.
14. Adverse pre-tap hole conditions ( size, depth, straightness, roundness, glazed or work hardened surface, chips in the bottom ).
15. Tap and prepared hole are not aligned.
16. Work piece and fixture lifting on reversal when tapping vertically.
17. Lack of proper lubrication on application.

Measuring Taps

The major diameter and pitch diameter are two critical measurements on any tap. It is important to monitor the wear on these dimensions as they will eventually wear with prolonged use. Back taper, thread relief, and built up major diameter are three factors in the design of taps, dies, and cutting tools that should be taken into consideration when making measurements on the major diameter and pitch diameter of taps, dies, and cutting tools.

Back taper is a gradual decrease in the thread diameter towards the shank. This is usually about .001" in the diameter per one inch of length. Thread relief gradually decreases the thread diameter towards the heel of the land and as a rule covers about two thirds of the land width although in certain cases it may cover the entire width. The function of the back taper and thread relief is to provide easier cutting action and reduce friction. Measurements for size should always be taken across the full threads immediately behind the chamfer and as near the cutting face of the land as possible. Taps, dies, and cutting tools are always made larger than basic on the major diameter to allow for wear, and to provide major diameter clearance in the tapped hole.

A basic micrometer can be used to measure the major diameter of the tap. The micrometer anvil should contact the teeth at the cutting taps and dies face. The pitch diameter can be measured by use of the Three Wire Method Thread Measuring System.