Oster 784 4" Pipe And Bolt Machine

A Precision Quality Built 4" Machine

This machine is designed and built as a 4" capacity Threading Machine. It is not an oversize version of a 2" machine. Its quality construciton, versatility, and outstanding performance in the shop or on the job have long made it the Standard of the Industry. Used for applications where production quantities, work size, or thread quality are the primary consideration

Oster 784 4" Threader

Cut-Off, Reaming And Chamfering

The Lathe type Cut-Off and Chamfer Tools are cross rail mounted on the back of the Die Head. The easy operationg Reamer is of the swing type.

Chamfering and Cut-Off for the Oster 784 Threader

Capacities

Standard Pipe Range
1" to 4"
Extra Pipe Range
1/2" and 3/4"
Standard Bolt Range
3/4" to 3"
*Extra Bolt Range
3/8" to 11/16"
*Special Chuck required.

Specifications

Spindle Speeds
16-23-35-51
Carriage Travel
15"
Length
5' 9"
Width
3' 5"
Height
4' 4"
Net Weight
1950 lbs.
Shipping Weight
2300 lbs.

Standard Equipment Furnished

Die-Heads - Two die heads. One for sizes up to 2", and the other for sizes 2-1/2" to 4".
Dies - Two sets to cover standard pipe range, 1" thru 4". RIGHT Hand Only.
ONE set high speed steel Symbol QUAD Dies (1" thru 2") and one set high speed steel Symbol 74 Dies (to thread all sizes 2-1/2" thru 4"). Left Hand Thread can also be produced using optional Die Head and Dies.
Cutter - Blade type tool with double V block centering device.
Reamer- Swing-type.
Chamfer Tool - Mounted in cut-off block.
Front Chuck - Wrenchless, three-jaw, universal gripping.
Rear Chuck - Wrenchless, three-jaw, universal centering.
Motor - 5hp., 1800 rpm., 3 phase, 60 Hz. 230 or 460 volts.
(Motors of other specifications available.)
Motor Control - REVERSING magnetic starter and push button station, with safety 120V control circuit at motor controls.
Gage - Direct reading DRUM type, mounted on carriage handwheel.
Oil Pump - "V" Belt driven, by drive motor.
Oil - Thread cutting, TEN gallons-Oster "BESTOIL".

Additional Accessories

No. 200 Nipple Chuck
No. 4 Nipple Chuck

Die heads

Oster Quad II Diehead for the Oster 784
Oster Quad II Diehead for the Oster 784
Two quick-opening, removable, lever operated die heads cover the entire pipe and bolt range. Both have a positive locking device and means for adjusting all dies simultaneously for over or undersize threads. Quick, easy die change from one size to another makes them particularly desirable where a variety of sizes are to be threaded.

The No. 784 is equipped with one No. 03852 quick-opening die head with one set of Symbol QUAD high speed steel pipe dies for 1" thru 2" plus the No. 03590 Die Head and a single set of symbol 74 high speed steel pipe dies to thread all sizes 2-1/2" thru 4".

Motor Control

Magnetic starter and push button station with REVERSING control. A JOG - RUN selector switch allows a means for jogging the spindle to facilitate shifting gears. 230/460V input is converted to 120V at the machine control for the operator's safety.
Headstock for the Oster 784 Threader

Motor Mount
and
Transmission

Motor is mounted on an adjustable plate, driving through three "V" belts which, in turn, drive a selective gear-type transmission. The "V" belts cushion shocks and make for quiet, smooth operation. All shafts are ball bearing mounted.

Motor Mount for the Oster 784 Threader

Accessories

Victaulic Type Grooving Tool Attachment

These Tools automatically insure correct depth, width and distance from pipe end for Victaulic Grooving applications. Available as extra equipment with the No. 784 Machine.

Carriage with Victaulic Attachment for Oster 784 Threader
Victaulic Type Grooving
No. 04274

Rear Gripping Chuck

Rear Gripping Chuck No. 02969 (in place of rear centering chuck) wrenchless - three flange jaws - universal gripping.