Airtac BSED Clamping Double Acting Cylinder BSED125X500S
The AirTAC Airtac BSED Clamping Double Acting Cylinder BSED125X500S combines a double-rod ISO 15552 cylinder — a Ø32mm rod out BOTH ends for equal force both directions — with an integrated spring-applied, air-released ROD LOCK that holds up to 8600 N in either direction if air is lost. Ø125mm bore, 500mm stroke, PT1/2 ports, G1/8 lock-release.
- BoreØ125 mm
- Stroke500 mm
- Static holding force8600 N
- ConfigurationDouble rod + lock
- Cylinder portPT1/2
- Lock-release portG1/8
About the Airtac BSED Clamping Double Acting Cylinder BSED125X500S
The AirTAC BSED125X500S is a double-acting, double-rod ISO 15552 profile cylinder featuring an integrated spring-applied, air-released rod lock. A rod exits both ends, delivering equal drive force of 5734 N each way at 0.5 MPa and 8028 N at 0.7 MPa. The fail-safe collet lock provides a bidirectional static holding force of 8600 N without requiring live air.
This 125 mm bore unit includes a magnetic piston (-S) for position sensing with CMSE reed or DMSE electronic sensors. It features a 32 mm rod with an M27x2 thread, a 40 mm cushion length, and a PT1/2 cylinder port. The separate G1/8 release port controls the lock, which must only be engaged after the rod stops and released when piston sides are pressure-balanced.
Double Rod + 8600 N Rod Lock (Ø125mm)
A rod exits both ends for symmetric force and back-rod tooling, and a spring clamps the collet so the Airtac BSED Clamping Double Acting Cylinder BSED125X500S holds its position in both directions on air loss or E-stop. Apply 0.15–0.7 MPa to the G1/8 release port to unlock. Engage only after the rod has stopped (not a dynamic brake), and release only when both piston sides are pressure-balanced; allow ≥0.5 s for full release.
Airtac BSED Clamping Double Acting Cylinder BSED125X500S Technical Specifications
| Model | Airtac BSED Clamping Double Acting Cylinder BSED125X500S |
|---|---|
| Series | BSED ISO 15552 double-rod rod-lock cylinder |
| Bore size | Ø125 mm |
| Stroke | 500 mm |
| Static holding force | 8600 N |
| Cylinder port | PT1/2 |
| Lock-release port | G1/8 |
| Configuration | Double rod, double acting |
|---|---|
| Operating pressure | 0.15 – 0.7 MPa |
| Unlocking pressure | 0.15 – 0.7 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 500 mm/s |
| Max stroke | Up to 1000 mm |
Specifications follow the official AirTAC BSED datasheet. Rod thread M27×2 both ends. Mounting (BSED): Basic, LB, FA, TC. Port options: PT (standard) / G (BSPP); lock-release port is G1/8.
Theoretical Output Force (Ø125mm)
| Pressure | Force (both directions) |
|---|---|
| 0.5 MPa | 5734 N |
| 0.7 MPa (max) | 8027 N |
| Max drive (@0.7 MPa) | 819 kgf |
A rod exits both ends, so force is equal on extend and retract. Drive force is separate from the 8600 N static lock holding force. Size with a safety margin.
Model Code: Airtac BSED Clamping Double Acting Cylinder BSED125X500S
| B | Rod-lock cylinder prefix. |
|---|---|
| SED | ISO 15552 double-rod double-acting body. |
| 125 | Bore size in mm. |
| ×500 | Stroke length in mm. |
| -S | Optional built-in magnet for CMSE / DMSE sensor sensing. |
Thread: PT (blank) / G. Mounting (BSED): Basic, LB, FA, TC. Related: SED (double rod, no lock), BSE (single-rod rod lock). Sensors CMSE/DMSE fit magnetic BSED.
Where the Airtac BSED Clamping Double Acting Cylinder BSED125X500S Is Used
Heavy Machining Clamps
Secures heavy workholding fixtures with 8600 N of fail-safe holding force during power loss, while providing 8028 N of equal both-way clamping drive.
Pallet Stop Gates
Halts 500 mm stroke pallet transfers reliably; the double-rod design resists rotational torque while the collet lock holds the load mid-stroke.
Overhead Lift Stops
Maintains vertical position with no live air during E-stops, though safety-rated controls are required for man-rated or overhead lifting loads.
Is the Airtac BSED Clamping Double Acting Cylinder BSED125X500S the Right Cylinder?
Select this 500 mm stroke model when an application requires both-way symmetric force and mid-cycle fail-safe holding. Verify your load does not exceed the 8600 N holding force. If you need less force, the 100 mm bore neighbor offers 3681 N at 0.5 MPa and 5500 N holding. If you need more holding capacity, note that 125 mm is the largest standard BSED bore. At 500 mm, guide the load to prevent excessive side-loading on the rod.
Operating pressure is capped at 0.7 MPa with a speed range of 30-500 mm/s. When ordering a replacement, confirm the 125 mm bore, 500 mm stroke, PT1/2 port, and -S magnet. Mounting options are limited to Basic, LB, FA, and TC. Always allow at least 0.5 s for the lock to release after balancing pressures.
Quick checklist
- ✓ Need both symmetric force AND fail-safe hold?
- ✓ Load to hold ≤ 8600 N?
- ✓ Back-rod space for tooling/flag
- ✓ Lock engaged only when stopped
- ✓ G1/8 release-air line available
Installation & Safety Notes
- check Engage the lock only after the rod has stopped — not a dynamic brake.
- check Release only when both piston sides are pressure-balanced.
- check Allow ≥0.5 s for full release before commanding motion.
- check Feed the G1/8 release port with 0.15–0.7 MPa clean air.
- check Support both rod ends; avoid side load.
- check Use BSED mounting (Basic/LB/FA/TC).
Airtac BSED Clamping Double Acting Cylinder BSED125X500S FAQ
The drive force is equal both ways: 5734 N at 0.5 MPa and 8028 N at 0.7 MPa (max 819 kgf). The static fail-safe holding force of the rod lock is 8600 N.
If air is lost, the spring-applied collet clamps the rod, holding the load up to 8600 N. To release, apply 0.15-0.7 MPa to the G1/8 release port after balancing piston pressures, allowing at least 0.5 s for disengagement.
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