Preparation for Pipe Threading

Your Portable Threading Machine comes fully assembled but will require insertion of the Die prior to operation.

It is important that your read the entire manual to become familiar with the unit BEFORE you use it. Be sure that you have all parts described in the Parts List. To help you with assembly, please refer to the assembly diagram on page 7 and the parts list on page 6.

Step 1)

Determine the size of the pipe to be threaded.

Step 2)

Select the appropriate die to be used. Four different Dies are included with the Threading Machine.

 

The Dies are the following sizes: 1/2", 3/4", 1", and 1-1/4". The dies are intended for use on

 

standard schedule 40 and schedule 80 steel pipe.

Step 3)

Insert the die into the Worm Gear (7) of the Machine. The dies will fits into the Worm Gear either

 

from the left or the right side of the tool. Make sure that the die is held in place by the Retaining

 

Ring (8) before proceeding. The Machine is pressure fitted so once the die is inserted properly, it

 

may require light tapping with a wooden mallet to remove the die.

Step 4)

Verify that the oil can is filled with oil and ready to be used during the threading operation.

Step 5)

The Pipe Clamp (29) should always be used to secure and support the pipe during the threading

 

operation. The round Clamp extension should parallel the pipe.

Step 6)

Located in front of the ON/OFF trigger switch is a Forward/Reverse switch which determines the

 

direction of the threading operation. With the Machine held in the right hand:

 

Switch in right position = Clockwise rotation

 

Switch in left position = Counterclockwise rotation

Operation

Now that the proper die is installed, you are ready to insert the pipe, secure it, and begin cutting threads.

Step 1)

Insert pipe into the rear of the die - see illustration to

 

the right. Verify that the inside diameter of the die

 

matches the outside diameter of the pipe.

Step 2)

Make sure that the Clamp (29) is effectively clamping

 

the pipe and that the pipe is well supported while

 

threads are being cut. During threading, use the round

 

Clamp extension for torque on the pipe.

Caution:

Make sure that pipe end and threads of the die are

 

sufficiently oiled at all times. Otherwise the die life

 

will be shortened and the threads will be rough.

Step 3)

Set the Switch to the right (Forward) position. While

 

holding the grip with one hand, press the trigger in

 

and pull up on it to turn the machine on. Apply

 

pressure to the pipe until the die engages the pipe

 

cutting two to three threads.

Step 4)

From this point, the die will automatically be drawn over the pipe and a standard taper thread will

 

be cut.

Step 5)

When the proper amount of threads are cut, release the trigger switch to stop the Machine. Move

 

the Forward/Reverse switch to the left position (Reverse) pulling in and up on the trigger to turn

 

the machine on. This will disengage the die from the pipe.

Step 6)

When sliding the pipe out of the machine, be careful not to damage the newly cut threads.

 

REV 12/05, 01/07

SKU 41876

For technical questions, please call 1-800-444-3353.

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Harbor Freight Tools 41876 operating instructions Preparation for Pipe Threading, Operation