Airtac SILB Rear Locking Cylinder SILB200X400
Genuine AirTAC ø200 mm end-lock iso 15552 cylinder, order code SILB200X400 from the SIL200 range. The options this code selects are decoded below; series data follow the official AirTAC catalog.
- Stroke400 mm
- MountingBasic (no mounting)
- VersionRear lock (B) · - · PT
- Bore sizeØ200 mm
- Stock strokes25 – 1000 mm
- Catalog standard strokeup to 1500 mm (longer on request)
- 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 SILB Rear Locking Cylinder SILB200X400
The SILB200X400 pairs a 400 mm stroke with the 200 mm bore of the ISO 15552 end-lock family, and since the SILF/SILB series is discontinued it ships as SAILB200X400 - same code, new prefix. Every figure on this page describes the SAILB unit the buyer receives. A stroke this long sits well into the listed 25 to 1000 mm span, so the body adds real length over short-stroke siblings; budget space for the 400 mm of extension and check rod column strength under compressive loads.
The B places the mechanical lock in the rear cover. With the lock-side port exhausted, the piston is held at the fully retracted end, so the rod cannot drift out if supply air is lost; air on that port releases the lock automatically and a hand lever does it manually. AirTAC publishes no holding-force figure for the lock, so confirm it from the datasheet. Output comes from the bore alone: 15708 N push and 15080 N pull at 0.5 MPa, rising to 21991 N push and 21112 N pull at 0.7 MPa.
Airtac SILB Rear Locking Cylinder SILB200X400 Technical Specifications
| Order code | SILB200X400 |
|---|---|
| Product | Ø200 mm end-lock ISO 15552 cylinder |
| Stroke | 400 mm |
| Mounting | Basic (no mounting) |
| Version | Rear lock (B) · - · PT |
| Bore size | Ø200 mm |
|---|---|
| Stock strokes | 25 – 1000 mm |
| Catalog standard stroke | up to 1500 mm (longer on request) |
| Acting type | Double acting, with end lock |
| Lock position | Front cover (F) or rear cover (B) |
| Lock release | Automatic (air on the lock-side port) or manual lever |
| Port size | 3/4" (PT standard) |
| Piston rod / rod thread | Ø40 mm / M36×2 |
| Fluid | Air (filtered by 40 µm element) |
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 500 mm/s |
| Cushion | Adjustable air cushions |
Source: AirTAC Products Catalog 2026A (PDF01-P0376/P0377), SAIL specifications and ordering code; body as SAI. The SILF/SILB series is discontinued; these are the SAILF/SAILB specifications.
How to choose
Order this basic-mount code when the cylinder's own mounting holes suffice; for rigid flanged fixing pick SILB200X400FA or SILB200X400FB, and SILB200X400TC for a center trunnion that lets the body pivot. Add S (SILB200X400S) only if you need a magnet for position sensors - this code carries none. Swap the port thread with G (SILB200X400G) for BSPP instead of the standard 3/4 inch PT, or move to SILF200X400 when the load must be held at the front, rod-end cover.
Applications
Retracted gate holding
A heavy vertical gate or lift platform must stay down during an air failure; the rear-cover lock holds the piston through the full 400 mm stroke until air returns or the lever is used.
Long conveyor gate drives
Diverter or transfer gates with wide product lanes need real travel; 400 mm of stroke and 21991 N push at 0.7 MPa move the mechanism at speeds from 30 to 500 mm/s.
Long-return press assist
Where a fixture must stay retracted during manual loading, the end lock frees the operator from relying on air pressure alone across the long 400 mm return stroke.
FAQ
What are the key figures of the SILB200X400?
It ships as SAILB200X400. Bore 200 mm, stroke 400 mm, double acting with the end lock in the rear cover, basic mounting, 3/4 inch PT ports, M36x2 rod thread on a 40 mm rod, adjustable air cushions, 0.15 to 1.0 MPa working pressure (1.5 MPa proof), -20 to 70 C, 30 to 500 mm/s, no magnet, 15708 N push and 15080 N pull at 0.5 MPa.
Is the SIL series still current?
No. AirTAC discontinued the SILF/SILB series and supplies this order as SAILB200X400 - the identical code with the current SAIL prefix. The specifications described here are those of the replacement unit you receive.