PMT Type

PMT-316 . PMT-316 plus . PMT-625 . PMT-625 plus

This product identifies a new generation of Sliding Bearings for applications in low and high temperature, thanks to a special coating performed with a system similar to the PVD process. This coating confers to the material an excellent resistance to extreme temperatures while maintaining a good coefficient of static friction even with a dynamic heavy load.

The metal backing layers used for this product are the Aisi 316L and the Inconel 625. With this type of product, the shaft should not be heat treated. It is not recommendable to use oil and grease with these bearings.


BEARING SECTION

GRAPHIC LOAD/SPEED
PMT-316 . PMT-316 plus . PMT-625

GRAPHIC LOAD/SPEED
PMT-625 plus

PS: the values shown in the graph were determined with a test of constant load, and running for 1000 cycles at three different temperatures: -190 °C, +18 °C and +260 °C

Dimensions

TABLE LEGEND:

SIZE:
Inside and outside bearing diameters
INSIDE Ø:
Tolerance range of the inside diameter after the assembly in the seat (mm)
HOUSING/SEAT Ø:
Housing/seat tolerance (mm)
BEARING THICKNESS:
Thickness tolerance of the finished bearing (mm)
CUT:
Maximum opening of the bearing flaps (mm)
SHAFT Ø:
Correct size of the shaft to be used with the bearing

BEARING THICKNESS CUT SHAFT Ø
SIZE
I.D. - E.D.
INSIDE Ø
MIN AND MAX
HOUSING/SEAT Ø
MIN AND MAX
ADM. THK. IDEAL RANGE ADM. THK. Max CORRECT SIZE
[[ dato.01 ]] [[ dato.02 ]] [[ dato.03 ]] [[ dato.04 ]] [[ dato.05 ]] [[ dato.06 ]] [[ dato.07 ]] [[ dato.08 ]] [[ dato.09 ]] [[ dato.10 ]]

Comparison table

PMT-316
Aisi 316L
+ Special Coating
PMT-316 plus
Aisi 316L
+ Special Coating
PMT-625
Inconel 625
+ Special coating
PMT-625 plus
Inconel 625
+ Special coating
FASTRACK SERVICE
SUPPORTING SHELL C 0.03%, Mn 1.80%
S 0.025%, Cr 16.70%
P 0.03%, Ni 10.00%
Si 0.50%, Mo 2.00%
C 0.03%, Mn 1.80%
S 0.025%, Cr 16.70%
P 0.03%, Ni 10.00%
Si 0.50%, Mo 2.00%
C 0.10%, Co 1.00%
Mn 0.05%, Ta + Nb 3.15 ÷ 4.15%
Cr 20 ÷ 23%, Ni Rest
Mo 8 ÷ 10 %
C 0.10%, Co 1.00%
Mn 0.05%, Ta + Nb 3.15 ÷ 4.15%
Cr 20 ÷ 23 %, Ni Rest
Mo 8 ÷ 10 %
The given values are nominal values from literature.
SLIDING LAYERS Physical Vaporization of the special coating.
Multilayer deposit of the Surface, minimum hardness 180 HB, and minimum thickness 15 micron.
SHAFT The shaft surface finishing, for optimal performance, shall be between 0.40 and 1.60 micron Ra,
depending on different application. Hardness 100 – 160 HB5.
MECHANICAL PROPERTIES
WORKING TEMPERATURE min - 198 °C - max + 430 °C min - 100°C - max + 500 °C min - 198 °C - max + 430 °C min - 100°C - max + 600 °C
COEFFICIENT OF FRICTION 0.06-0.12 0.08-0.20 0.06-0.12 0.04-0.10
MAX. SPEED 0.40 m/s 0.40 m/s 0.40 m/s 0.50 m/s
MAX. STATIC LOAD 200 N/mm2 200 N/mm2 200 N/mm2 200 N/mm2
MAX. DYNAMIC LOAD
(max. speed 0.10 m/s)
150 N/mm2 150 N/mm2 150 N/mm2 190 N/mm2
MAX. DYNAMIC LOAD
(max. speed 0.40 m/s)
100 N/mm2 100 N/mm2 100 N/mm2 100 N/mm2
CHEMICAL RESISTANCE
HYDROCARBONS Excellent Excellent Excellent Excellent
HYDROCHLORIC ACID
(concentrate to 10%)
Excellent Excellent Excellent Excellent
SULFURIC ACID
(concentrate to 10%)
Excellent Excellent Excellent Excellent
METHANE Excellent Excellent Excellent Excellent
OXYGEN Excellent Excellent Excellent Excellent
SODIUM HYDROXIDE Excellent Excellent Excellent Excellent
LIQUID NITROGEN Excellent Excellent Excellent Excellent
SOLVENTS Excellent Excellent Excellent Excellent

Note: The informaton in this data-sheet is to be considered reliable, but conditons and methods of use, which are beyond our control, may modify the results. The informaton and data contained in this data-sheet are the result of a long and detailed research, however F.lli Paris S.r.l. cannot be considered responsible for any incorrect or incomplete data. Owing to the constant development of the products, we reserve the right to make changes to them without prior notice.