PTR Series | Thread / Profile Rolling Machines
Choose max. rolling pressure :
Specification PTR 30
|Max. rolling pressure
|Rolling material diameter
||5 – 30 mm
|Thread max. Pitch
|Outer roller diameter
||120 – 170 mm
|Inner roller diameter
|Max thickness of roller
|Spindle center distance
||120 – 240 mm
|Axis tilting angle
|Main motor power
Details PTR 30
Thread / Profile Rolling Machines
As the global market leader in ECONOMICAL metal working machinery, PROFIMACH®
offers the best and easiest entry into the world of metal cutting industry and all metal
mass production business at a very affordable budget. We provide a wide range of
product choices for every metal processing job. Our machines bring a cost-effective,
low-maintenance, environmental-friendly solution to your organization.
PROFIMACH conventional and CNC machine tools are built by top machine tools
manufacturers to satisfy the highest and toughest standards demanded by the high tech
European market. We deliver a machine that provides quality cutting and high
tolerances, low productivity loss between jobs and less maintenance costs, equating to
a higher return on investments.
Our success is built on long-standing customer relationships, technical expertise and
sensitivity to our customer needs. We always look for improving our efficiency while
adding extra value for the benefit of our customers.
THREAD ROLLING PROCESS
Rolling process is recommended when threads are required with superior tensile, shear,
and fatigue strength. Other processes remove material to produce the thread form, but
thread rolling displaces the material with hardened steel dies. Rolling dies typically have
a hardness between a range of RC 58-63 and there is a specific set of dies for each thread
size and each thread form.
Static tensile tests on parts formed through thread rolling show overall increases in
strength of about 30 percent. Fatigue strength is improved by 50-75 percent. Tests on
bolts first heat-treated to a hardness of 35-40 Rockwell C and subsequently rolled show
even greater fatigue strength.
A minimum elongation of 12% and tensile strength no greater than 110Kg/square mm
is required for good rolling result. This includes most steels, aluminum, cast irons, brass
with at least 60% copper and light alloys. Material to be rolled must not be harder than
These basic features give the material formability; softer materials are easier to roll, but
thread quality is not so good; harder materials produce excellent thread finish yet with
a compromise in the tools life. Examples:
Thread rolling speed:
It is important to select the correct rolling speeds to obtain good thread quality and long
life of the rolls. The correct speeds depend on the thread form to be rolled, the
elongation and tensile strength of the material and the speed capabilities of the
machinery in use.
If too low a rolling speed is used the material may not flow as required and the rolls and
head may be damaged.
Thread rolling speeds are always much higher than thread cutting speeds!
Recommended thread rolling feed speeds:
High benefits of Thread rolling process are:
✓ Lower costs
✓ Increased production
✓ Faster lead times
✓ Superior quality and accuracy:
○ Stronger threads
○ Improved finish
○ More accurate profile
PRT – THREAD & PROFILE ROLLING MACHINES
Versatility – with the ability to do both infeed and thru-feed, a standard feature on most of our
machines, you can form anything from a bolt or stud to a long-threaded bar.
Simplicity – With most setups performed in less than ½ hour, our machines can be used for both
production and custom thread or form rolling.
Cost-effectiveness – The ability to tilt die spindles to the helix angle of thread lets our customers use
lower-cost, annular ring dies.
Productivity – Speed-up dies can increase work feed rate while keeping RPMs of the work piece
constant. Helical slow feed dies can decrease work feed rate, thereby allowing material to flow and
form at a slower pace – requiring less horsepower and pressure than needed for annular dies.
Maintainability – easy to maintain and service due to simple design and high-quality components.
✓ ONE SET OF THREADING ROLLERS
✓ WORK LIGHT
✓ COOLANT UNIT
✓ MACHINE LEVELING PADS AND FOUNDATION BOLTS
✓ LUBRICATION SYSTEM
✓ MAINTENANCE TOOL KIT
✓ OPERATION MANUAL
✓ CE NORMS
THREAD ROLLING EXAMPLES
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