Receding Self-Opening Die Heads; Inserting/Changing The Dies; Adjusting Thread Size; Adjusting Thread Length - RIDGID 300 Compact Manual

• Bolt and Straight Threads – Thread the desired
length – watch closely for any interference between
the parts.
Move the throwout lever to the OPEN position, retracting
dies.

Receding Self-Opening Die Heads

The Model 728 and 928 receding self-opening die heads
are used on 1233 threading machine for 2
sizes. A trigger is used to open the die head when the
thread is complete, and is adjustable to change thread
length.
Adjuster
Adjuster
Knob
Slide
Trigger
Cam Plate
Front
Figure 15 – Receding Self-Opening Die Head

Inserting/Changing the Dies

1. Place the die head with numbers facing up.
2. Pull back on adjuster knob on die head and fully
open die head by sliding cam plate in direction of
CHANGE DIES arrow on cam plate.
Figure 16 – Inserting Dies
3. Remove dies from die head.
Insert appropriate dies into the die head, numbered
edge up. Numbers on the dies must correspond with
those on the die head slots (see Figure 16). The die
slots have a ball detent that engages with the groove
on dies when properly installed. Always change dies
as sets – do not mix dies from different sets.
300 Compact/1233 Threading Machines

Adjusting Thread Size

1 / " and 3" pipe
2
Size Bar
Adjustment
Nuts
"Change
Dies"
Arrow

Adjusting Thread Length

Back
Ball
Ball
Detent
Detent
For Long
Threads
Groove
Figure 18 – Adjusting Thread Length
4. Pull back on adjuster knob and rotate cam plate to
desired size setting.
5. Engage adjuster knob into slot.
1. Loosen the adjustment nut for the desired pipe size.
2. When setting for new dies, start with the adjusting
slide index line aligned with the size mark on the size
bar.
3. If thread size needs to be adjusted, set the index line
slightly off the mark on the size bar in the + direction
(larger thread diameter, less
turns of fitting engage ment)
or in the - direction (smaller
thread diameter, more turns
of fitting engagement) as
shown on the size bar.
4. Tighten the adjustment nut.
1. Loosen the screw on bot-
tom trigger.
2. For short threads, shift the
bottom trigger towards the
machine spindle. For long
threads, shift it away from the spindle (see Figure 18
– factory settings shown). Long threads are typically
preferred in Far East and short threads in Europe. Set
as desired.
3. Re-tighten the screw.
For Short
Threads
Top Trigger Hole Short Threads
Location
+
Adjustment
Slide Index
Line
-
Size
Bar
Adjustment
Nut
Figure 17 – Adjusting
Thread Size
Top Trigger
Bottom
Trigger
Long Threads
11