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
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
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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Standard models are processed and dispatched in 3-5 business days.
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