US PRO 110pc Engineers SAE and Metric Tungsten Steel Tap and Die Set Rockwell Hard US2515 - NEW

US Pro Tools need we say more. US Pro Tools are made to the highest American engineering standards, which mean that they are one of the best tool manufacturers on the market.

Precision machined, Tungsten steel taps and dies. Dies are split to help facilitate the fine adjustment of core diameter. Set includes Metric coarse and fine sizes.

The set includes two sliding jaw type tap wrenches and T-Bar type tap wrench together with two steel die holders with knurled screws.

Supplied in heavy-duty blow moulded storage case.

The taps and dies contained in this set are precision tools.

They are manufactured from high quality steel, heat treated, and tempered for Rockwell HARDNESS 58-61 C.

As with all precision tools, proper use and care is required to assure proper threading and longest tool life.

This set of 'engineers' taps and dies includes a Taper tap for starting the cut and an intermediate tap (see explanation below).

Taper tap or starting tap.This is similar to a plug tap but has a more pronounced taper to the cutting edges. This feature gives the taper tap a very gradual cutting action that is less aggressive than that of the plug tap. The number of tapered threads typically ranges from 8 to 10. A taper tap is most often used when the material to be tapped is difficult to work (e.g., alloy steel).

Intermediate tap or second tap.The tap has tapered cutting edges, which assist in aligning and starting the tap into an untapped hole. The number of tapered threads typically ranges from 3 to 5. In the US they are commonly known as intermediate taps, whereas in Australia and Britain they are commonly known as second taps.

The inexperienced user should carefully read these instructions

Taps

To cut an internal thread, select the tap of the desired size, tap wrench, proper drill size or hole size, and lubricating or cutting oil.

The proper hole size is very important in the formation of good threads. An oversized hole results in reduced thread height, an undersized hole will overload the tap and cause undue breakage Refer to the required drill size permanently marked on the side of each tap and drill the hole to desired depth.

Secure tap by the square in the tap wrench and start threads by turning clockwise Great care must be taken to start the tap square to the hole. As the tap is turned it bites into the metal and leads into the hole. After the tap has been started, metal chips that flow into the flute spaces must be broken to relieve pressure on the tap. This is accomplished by reversing the tap direction every 1/4 to 1/2 revolution depending on the tightness encountered providing lubrication to the cutting edges while tapping will result in smoother threads and longer tap life. Continue threading until the tap passes through the part or to the desired depth.

When tapping a blind hole (one that does not pass entirely through the part) take care in drilling to provide clearance at the bottom for chips and the starter threads. (These chamfered threads on the end of the tap will not cut full threads.)

This set of taps is designed for general use.

PLUG style with 3 to 5 chamfered threads.

BOTTOMING taps with 1 to 1 chamfered threads for tapping to the bottom of a blind hole.

TAPER taps with 8 to 10 chamfered threads for easiest starting are also available but are not needed by the average user.

Dies

To cut an external thread, such as on a bolt, select the correct die for the rod being threaded, die stock, and lubricating or cutting oil. Size of the rod or bolt, is of great importance. It must be no larger than the desired thread, and preferably 005" to 010" undersized. Oversized work may damage the die and will make turning very difficult.

Slightly undersized work is easier to thread and furnishes enough thread height for normal use.

After securing the part being threaded, insert the die into the die stock and run the screw snugly into one of the recesses in the outside surface of the die. (The recess and slot pattern of dies allows use with a variety of die stocks.) The chamfered side of the die is used for starting the threading operation. Always bevel the end of the piece to be threaded to make angles starting easier. This filed or ground chamfer also helps in starting at right to the work which is of major importance. Start the die on the rod with clockwise rotation until it begins cutting onto the work piece. Chips will flow into the holes provided and should be broken by reversing the action every 1/4 to 1/2 turn depending upon tightness encountered.

Continue this operation until threads of the desired length have been cut. Provide appropriate lubrication while cutting threads.

US Pro Tools made by professionals for professionals.

Specification

• Brand : US PRO
• Type : Metric and SEE Tap and Die Engineers Set
• Size : 4 NCP 40; 6 NCP 32; 8 NCP 32 10 NCP 24; 10 NFP 32; 12 NCP 24; 1/4 NCP 24; 1/4 NCP 20; 1/4 NFP 24; 1/4 NSP 28; 1/4 NSP 32; 5/16 NCP 18; 5/16 NFP 24; 3/8 NCP 16; 3/8 NFP 24; 7/16 NCP 14; 7/16 NFP 20; 1/2 NCP 13; 1/2 NCP 20; 9/16 NCP 12; 9/16 NFP 18; 5/8 NFP 18; 5/8 NCP 11; 3/4 NFP 16; 3/4 NCP 10; 1/8 NPT 27; 1/4 NPT 18;
• Size metric 1 : M6 x 1.0; M8 x 1.25; M 10 x 1.5; M10 x 1.0; M11 x 1.5
• Size metric 2 : M12 x 1.25; M12 x 1.75; M14 x 1.25; M18 x1.5
• Tap type : Plug and taper for each size
• System of Measurement : Metric
• Number of Pieces : 110 Pieces
• Material : Tungsten Alloy Steel Rockwell HARDNESS 58-61 C
• Marking : Each tap and die are etched for easy identification
• Thread direction : Right hand thread (Clockwise to tighten)
• Weight : 6.15Kgs
• Stroage : Blow moulded storage case
• Grade : Engineering quality
• Box Dimensions : 45cm x 34cm x 6cm

Features

• The taps and dies contained in this set are precision tools
• They are manufactured from high quality steel, heat treated, and tempered for Rockwell HARDNESS 58-61 C
• As with all precision tools, proper use and care is required to assure proper threading and longest tool life
• This set of engineers taps and dies includes a Taper tap for starting the cut and an intermediate tap (see explanation below)

Includes:

• 35 x Dies
• 70 x Taps (1 taper and 1 plug for each size)
• 2 x Tap holder (big and small)
• 2 x Die holder (big and small)
• 1 x Tap ratchet

RRP - £189.99