Pneumatic Self-Feed Units

Self-Feed Unit Selection Guide 

Self-Feed Units: The Selection Process


a) Pneumatic or electric
b) Correct rpm

MetricR =318.5 x Surface Meters per Minute
Drill dia. (mm)
US StandardR =3.82 x Surface Feet per Minute
Drill dia. (inches)


a) ChuckBase drill comes standard with 3/8" (10 mm) keyed drill chuck.
Optional 1/4” (6.5mm) and 1/2” (13mm) keyed drill chucks.
b) Collet Holder & ColletOptional alternative to the keyed drill chucks.
Uses Type 950 collets, 3/8” maximum drill size.
c) Multiple Spindle HeadsMultiple Spindle Heads are available with fixed or adjustable centers.
The Heads mount directly onto the Self-Feed Units.
Multiple Spindle Head collets need to be ordered separately.
d) Offset HeadFor drilling applications requiring special clearances.
e) Spindle PositionersTo facilitate rapid changeover of spindle positioning where alternative settings are required on Multi-Spindle heads.

a) Nose Angle Bracket
b) Nose Flange
c) Column and Clamp Options

a) Return Limit KitSends out a positive signal when the tool returns to the home position. Pneumatic or Electric options.
b) Dwell ControlUsed to dwell for a set period of time in the extended position before returning back to the home position.
c) Hydraulic Feed ControlSets a constant feed rate through the material.
d) Peck Feed KitAllows pecking of unit for drilling deep holes.
e) Swarf Exclusion KitProtects drill unit from swarf (chips, dirt, fluid, etc.).
f) Exhaust CollectorReduces noise and protects drill unit from swarf. Allows muffling or piping of exhausted air away from the work area.
g) Bottom Limit KitSends a signal when drill unit is fully extended.
h) PLC Interface ModulePermits PLC to communicate with Self Feed Units.
i) Skip Check UnitEnables drill units to skip through tubular sections.

Why Use Air Tools?

Air tools offer a much better power to weight ratio compared with electric tools.
Safer than electric.
Air tools do not require the cool off period that some electric tools require.
Simpler design and construction.
More robust.
Not damaged by stalling.

Who Uses Air Tools?

1. Aerospace IndustryDrills, Tappers, Screwdrivers, Abrasive Tools, Riveters, Nutsert Tools.
2. Vehicle AssemblyDrills, Screwdrivers, Impact Wrenches, Abrasive Tools, Nutrunners, Nutsert Tools.
3. AutomotiveImpact Wrenches, Polishers, Chipping Hammers.
4. Construction IndustryImpact Wrenches, Chippers, Grinders, Scabblers. Needle Scalers, Core Drills.
5. White GoodsScrewdrivers, Drills, Tappers, Nutrunners, Riveters, Nutsert Tools.

How Does an Air Motor Work?

An air motor works by creating a flow of air over a rotor in a cylinder. This flow of air causes the rotor to turn and produce a torque proportional to the pressure of the air supply.

How Does a Percussive Tool Work?

A percussive tool works by applying air to either side of a piston in a cylinder in turn to propel the piston forwards and then backwards to produce a force on the object the piston comes into contact with.