The PTB pneumatic support is used for heads TB series applications. The PTB3300 support has 55 mm stroke, while the TB2500 is just a spring-loaded support for TB heads.
| Mod | Max. size | Tot. height | Threaded connection | Hole dia. | Shaft length |
|---|---|---|---|---|---|
| PTB 3300 | Square 60 | 230 | M18X1.5 | Hole d.50 | 20 |
| PTB 2500 | Square 60 | 260 | M18X1.5 | Hole d.50 | 20 |