TF - 625 TYPE
TF-625 . TF-625S
The TF code identifies a family of self-lubricating bearings and washers made by a composite multilayer material. The main parts composing this product are a modified filled PTFE layer (lead free, in accordance to the European Parliament “ELV” directive 2000/53/EC) for the sliding self-lubricating surface, and a special primer used to allow the sintering of the PTFE layer to various types of baking metal layers like: carbon steel, bronze, stainless steel and Inconel 625. Thanks to its structure, the TF type provides an excellent match between the mechanical strength of the steel and the low coefficient of friction of the modified PTFE sliding layer.
This is a product that can be used in applications with medium loads and in a clean environment with low levels of abrasive elements such as metal powders. It can also be used with special mineral oils and specific greases such as silicone compounds or lithium soap.
TF-625 – SUPPORTING SHELL:
INCONEL 625
C | 0.10% | Co | 1.00% |
Mn | 0.05% | Mo | 8 ÷ 10% |
Cr | 20 ÷ 23% | Ni | Rest |
Ta + Tb | 3.15 ÷ 4.15% |
TF-625 – BEARING SECTION
TF-625 – GRAPHIC LOAD/SPEED
TF-625S – SUPPORTING SHELL: AISI 316L
C | 0.10% | Co | 1.00% |
Mn | 0.05% | Mo | 8 ÷ 10% |
Cr | 20 ÷ 23% | Ni | Rest |
Ta + Tb | 3.15 ÷ 4.15% |
TF-625S – BEARING SECTION
TF-625S – GRAPHIC LOAD/SPEED
Dimensions
TABLE LEGEND:
SIZE:
Inside and outside bearing diameters
INSIDE Ø:
Tolerance range of the inside Ø 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 (carbon steel and other materials) (mm)
SHAFT Ø:
Correct size of the shaft to be used with the bearing
Comparison Table
TF-C | TF-316 | TF-316S | TF-625 | TF-625S | TF-F51 | |
|---|---|---|---|---|---|---|
Carbon Steel S235 JR
| Aisi 316L | Aisi 316L | Carbon steel S235 JR | Carbon steel S235 JR | Duplex A182 F51 | |
| FASTRACK SERVICE | X | X | X | X | ||
| SUPPORTING SHELL | C 0.17%, | C 0.03% | C 0.03% | C 0.10% | C 0.10% | C 0.20% |
| The given values are nominal values from literature. | ||||||
| SLIDING LAYERS | Filled PTFE film, colour black-gray, thickness 200–220 μm, | |||||
| SINTERING | Oven made sintering process between PTFE and the steel backing at a temperature of +250° C – BRONZE FREE. | |||||
| SHAFT | For an optimal performance the shaftsurface finishing shall be between Ra 0.40 and 1.60 μm, depending on the different applications. Hardness 80 – 160 HB5. | |||||
Mechanical Properties
| WORKING TEMPERATURE | min – 190 °C max + 260 °C | min – 190 °C max + 260 °C | min – 190 °C max + 260 °C | min – 190 °C max + 260 °C | min – 190 °C max + 260 °C | min – 190 °C max + 260 °C |
| COEFFICIENT OF FRICTION | 0.03-0.20 | 0.03-0.20 | 0.03-0.20 | 0.03-0.20 | 0.03-0.20 | 0.03-0.20 |
| MAX. SPEED | 1.00 m/s | 1.00 m/s | 0.50 m/s | 1.00 m/s | 0.50 m/s | 1.00 m/s |
| MAX. STATIC LOAD | 250 N/mm2 | 250 N/mm2 | 250 N/mm2 | 250 N/mm2 | 250 N/mm2 | 250 N/mm2 |
| MAX. DYNAMIC LOAD (max. speed) | 140 N/mm2 (0.10 m/s) | 140 N/mm2 (0.10 m/s) | 180 N/mm2 (0.05 m/s) | 140 N/mm2 (0.10 m/s) | 180 N/mm2 (0.05 m/s) | 140 N/mm2 (0.10 m/s) |
| MAX. DYNAMIC LOAD (max. speed) | 60 N/mm2 (1.00 m/s) | 60 N/mm2 (1.00 m/s) | 80 N/mm2 (0.50 m/s) | 60 N/mm2 (1.00 m/s) | 80 N/mm2 (0.50 m/s) | 60 N/mm2 (1.00 m/s) |
Chemical Resistance
| HYDROCARBONS | Excellent | Excellent | Excellent | Excellent | Excellent | Excellent |
| HYDROCHLORIC ACID (concentrate to 10%) | Excellent | Excellent | Excellent | Excellent | Excellent | Excellent |
| SULFURIC ACID (concentrate to 10%) | Excellent | Excellent | Excellent | Excellent | Excellent | Excellent |
| METHANE | Excellent | Excellent | Excellent | Excellent | Excellent | Excellent |
| OXYGEN | Excellent | Excellent | Excellent | Excellent | Excellent | Excellent |
| SODIUM HYDROXIDE | Excellent | Excellent | Excellent | Excellent | Excellent | Excellent |
| LIQUID NITROGEN | Excellent | Excellent | Excellent | Excellent | Excellent | Excellent |
| SOLVENTS | Good | Good | Good | Good | Good | Good |
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.
