Oster Power Threading Handbook

Troubleshooting Guide

Below is a list of possible conditions you may encounter while in search of perfect threads. Under each condition is a list of possible causes that may be responsible for that condition. Clicking on any of the possible causes will direct you to the relative section in the manual which should explain and help you to resolve said threading issue.

*Indicates no further information necessary

 

Dies Breaking

Material too hard or tough
Improper cutting fluid
On smaller diameters use die bushing
Misalignment of die head
Die head slots worn (See also)
Defective dies

Dies Chipping On Teeth

Improper cutting fluid
Material too hard
Poor cutting fluid flow
On smaller diameters use die bushing
Speed too fast
Die head slots worn or die holders worn (See also)
Dies damaged from being hammered in and out of die head
Stopping machine and restarting during cut without opening die head*
Possible damage from regrinding

Dies Chipping In Throat

Pipe chucked improperly
Pipe seam opened up*
Hard spot in material
Uneven end or torch cut
Slamming material into dies at start of cut
Threading roller-cut stainless steel

Dies Will Not Start On Material

Adjustable die head set too small
Dies not properly seated in die head
Machine out of alignment (See also)
Material not gripped properly in chuck jaws
Chuck jaws worn
Material oversized
Material not cut-off properly
Material too hard
Machine in reverse*
Dies are for left hand threads
Speed too fast

Taper Changes Over Length Of Thread

Die thread length not long enough to generate a full pipe thread*
Worn spindle bearings
Screw loose in die head
Slots worn in die head (See also)
Die head opening partially during cut
Dies not free in die head
Worn carriage ways
Die head not aligned with material

Lead Error On Bolt Threads

Dies need to be stoned (See also)
Dies resharpened too many times (See also)
Inconsistent pressure on carriage (See also)
Reground dies have wrong throat angle