Foredom T35A - Manual

FOREDOM ® T-35A
General Information
The Foredom T-35A Air Turbine Handpiece is capable
of generating 350,000 RPM’s (revolutions per
minute) Rotation is accomplished by forcing air at a
maximum rate of 40 P.S.I.– (pounds per square inch)
across an impeller or turbine which holds the collet.
The unit generates substantial speed, but little
torque, making it ideally suited for operations such
as cutting, carving, engraving, texturing, and fine
detailing with carbide or diamond points on materi-
als such as metal, bone, stone, porcelain, plastics,
glass, and hard woods.
Use a delicate touch on softer material and woods,
or the bur will bury itself and stall the handpiece, as
is the case when too heavy a cut is attempted.
Filtered and regulated air is fed into the handpiece
through an on/off foot pedal, or the air flow can be
turned off and on at the regulator. Clean, dry air is
an absolute requirement to run this machine effi-
ciently, as any foreign particles generated by or from
the air source (compressor) will be thrown into the
turbine and eventually clog and/or damage it.
With proper use and maintenance, the Foredom
T-35A Air Turbine can give a lifetime of use.
However, if a few basics are not observed, like any
fine instrument or machine, the unit will eventually
develop problems that will worsen if not corrected.
Be sure that the tubing used to connect the
handpiece to the air source is rated for the out-
put pressure of the compressor. The unit
• Wear a respirator to prevent the inhalation
of dust particles.
• Do not cover exhaust port at the rear of
handpiece during use.
• Keep the work area clean and organized.
• Keep children out of the work area and away
from any operating or moving machinery.
• Keep the foot pedal out of the way to avoid
accidental starts.
Changing Burs
To insert a bur, push the collet release plunger
and insert the bur into the collet. Make sure
that the bur is fully inserted into the collet
before releasing the collet release plunger.
Bur removal is easy: press the collet release
plunger and pull the bur out.
Service
Factory service is available by sending your
T-35A Air Turbine Handpiece with a note
stating the problem to:
The Foredom Electric Company
16 Stony Hill Road, Bethel, CT 06801 USA
Attn.: Service Department
Replacement Parts
Item Description Part No
Turbine Cartridge with Collet HP90038
Lubricant in Dispenser HP93514
Nose Cap HP93533
Spanner Wrench HP93513
Air Turbine Instructions
requires a minimum of 1.5 C.F.M.–cubic feet
per minute (42.5 liters per minute) of air at 40
P.S.I. (2.76 bar) which is also the recommended
operating pressure. A 1/4 HP or larger compressor
is required to generate this air pressure on a con-
tinuous basis. If you have purchased a handpiece
only, you must install an industrial filter in the air
line. As air is being compressed in the compressor,
heat is generated that causes a temperature
differential between raw air and compressed air
introducing moisture into the system which, in
turn, is forced with the air into the air line
feeding the handpiece. Without an in-line separa-
tor/ filter, impurities such as moisture or dirt are
carried with the air and forced against the
turbine impeller in the handpiece and will
damage the turbine.
Safe Operation
• Always wear proper eye protection when
using this and other power tools.
• Never operate the handpiece without a bur in
the collet.
• Always use 1/16 ″ (1.6mm) shank friction grip
burs rated for 350,000 RPM.
• Tie back long hair, and avoid wearing jewelry
or loose clothing that could get caught in a bur.
• Use a suitable dust collection system that will
remove not only larger dust particles, but also air
borne dust from the work area.
• Develop a light, but sensitive and controlled touch as
bur makes contact with material.
• For accuracy, dexterity, and comfort, hold the handpiece
loosely, but with enough pressure to maintain control.
Rev T-35A Inst. 2/7/03 2:38 PM Page 1