1.Structure of PGslide® bearings

Ø Supporting plate

Steel or elastomeric with steel insert

Ø Sliding pad

PTFE embedded (PE embedded on request)

Ø Counter plate

Steel plate with stainless steel sheet, welded, screwed or glued

Ø Guidance

- Steel / steel

- SST / CM1

- SST / PTFE

Ø Connection to sub-structure

All bearings (except types TP1, TP3 and HT) can be either screwed or welded

 2.Determination of the suitable PGslide® bearing type

Ø Flat sliding bearings TP and G series

If no angular rotations can occur this cheap and simple type is mostly recommended.

- Type TP without counter-plate

- Type G with counter-plate

Ø Spherical bearings K series

Spherical bearings are characterized by low assembly height and restraint free design. Permissible angle of rotation axy is 13‰.

If angular rotations can occur during the assembly phase but not in operation spherical bearings type K11 / K12 (one PTFE pad only) can be used.

In case of possible angular rotations during operation second PTFE pad in the spherical part must be used, this is type K21 / K22.

The fixed spherical bearing type KF can only cover angular and rotational movements.

Ø Pointed rocker bearings P series

Pointed rocker bearings have the advantage of high applicable loads with at the same time small junction area. Permissible angle of rotation axy is 13‰.

If angular and rotational movements occur at the same time fixed bearings type PFare to be used. In case of additional horizontal displacements the pointed sliding bearing type PK 1 / PK 2 should be used.

Ø High temperature bearings HT series (under preparation)

- Fixed bearing type HTF

- Sliding bearing type HT

- Isolation blocks (barriers)

Ø Roller bearings R series (under preparation)

- Type R

Ø Line rocker bearings L series(under preparation)

- Fixed bearing type LF

- Sliding bearing type LG1 / LG 2

Ø Pot bearings T series (under preparation)

- Fixed bearing type TF

- Sliding bearing type TG

Ø Elastomeric bearings V series (under preparation)

- Fixed bearing type Vx

- Sliding bearing type VG1 (guided) and VG2 (loose)

Ø Special type bearings

For lift-off loads, temporarily fixings, adjustable heights and many other cases and applications we can design and produce special tailor made solutions. Please do not hesitate to contact us!

1. Corrosion protection

Ø Standard: 2-component zinc dust / zinc phosphate coating

Ø On request hot-dip galvanized

Ø Custom made coatings on request

1. Permissible temperatures

According to the EN for „structural bearings PGslide®bearings are designed for 30°C. The catalogue however shows loads at 48°C too, reduced accordingly. Temperatures up to 180°C are possible when using a special type PTFE compound. If temperatures are even higher a thermal barriers must be designed in.

1. importantnotes

Ø PGslide® connecting plates are designed flexurally rigid. On site connections are to be designed accordingly.

Ø Evenness and parallelism are to be built in accordance with EN, DIN and other applicable.

Ø Bearings are to be designed the way that counter plates cover sliding pads under all operation conditions.

Ø Assembly and installation instructions are available on request.

Ø PGslide® bearings are designed for the g-fold load and conform with EN and DIN where applicable.

Ø Details of design can vary from catalogue drawings. All technical data in the catalogue are subject to change and without obligation.

Why use PTFE bearings?

• Very Low Friction Constant

The friction constant is lower than for any other solid material. Since the static and dynamic sliding coefficient are very close, no so-called stick-slip effect occurs.
Differentiation is made between dry running bearings and lubricated bearings.
For lubricated bearings, pan-shaped recesses are pressed in the PTFE sliding plate and provided with depot lubrication (silicone grease 300 medium, bridge bearing quality).
The coefficient of friction of PTFE deteriorates in case of low temperatures, while it remains largely constant for high temperatures. The values stated by us therefore refer to the most unfavorable values of -35°C, which occur in the approval procedures.

For the sake of simplicity, the following friction constants may be assumed under optimum installation conditions:
PTFE bearing, not lubricated about max. μ = 0.1
PTFE bearing, lubricated about max. μ = 0.04

• Corrosion Resistance

The PTFE sliding plates are absolutely corrosion resistant, resistant against chemicals and aging. The steel parts of the bearings are by standard sandblasted and provided with a zinc phosphate coating.
Upon request, all usual corrosion protection processes are offered, including hot galvanizing. Versions made of special steel alloys or stainless steel on request.

• Temperature Resistance

The range of application of our bearings is limited to those temperature ranges which are secured by official friction tests under load.

Temperatures at the sliding plate:

up to +48° C  =                   sliding plate PTFE bearing quality

up to +100° C    =                               acc. to application PTFE or PTFE-K

up to +180° C    =                               sliding plate PTFE K

(reduced load)

up to +600° C =                   sliding plate PTFE K

high temperature bearing with integrated insulation

• Use at temperatures of -60°C is ensured by tests.
• Use at temperatures of over 180°C requires custom tailored constructions / high temperature bearings.

• Maintenance-Free

PTFE bearings are maintenance-free, this also applies to lubricated PTFE bearings; no subsequent lubrication is required.

• Low Overall Heigth

Compared with other bearing types, PTFE friction bearings require only very low form factors.