AirTAC SIL50 End-Lock ISO Cylinder, 50 mm Bore
Every AirTAC SIL50 configuration on one page: 51 stock order codes with strokes from 10 to 1200 mm, 2 mounting styles and magnet versions, from $102.32. Pick a stroke, mounting and version to see the exact order code and price. Discontinued series: orders ship as the SAILF/SAILB with the same code.
This combination is not a stock order code. Request a quote and we will confirm availability and price.
- 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 SIL50
Discontinued: AirTAC has replaced the SILF/SILB series with the SAILF/SAILB series. Every SILF/SILB code on this page is supplied as the current SAILF/SAILB with the same code after the prefix, for example SILF50X10S ships as SAILF50X10S. The specifications on this page are those of the SAILF/SAILB you receive. Older hyphenated codes are the same code: SILF50X50-S ships as SAILF50X50S.
The AirTAC SIL50 is a double-acting end-lock ISO 15552 cylinder with a 50 mm bore and a 20 mm piston rod. At 0.5 MPa it pushes 982 N and pulls 825 N; at 0.7 MPa that rises to 1374 N push and 1155 N pull. Force depends on bore and pressure only, so every stroke on this page gives the same output.
All SIL50 versions share 1/4" air ports, an M16×1.5 rod thread and adjustable air cushions. The cylinder runs on filtered air between 0.15 and 1.0 MPa (proof 1.5 MPa), from -20 to +70 °C, at 30 to 800 mm/s. This page lists 51 stock order codes with strokes from 10 to 1200 mm; catalog standard strokes run up to 1200 mm.
The SIL50 adds a mechanical lock to one end cover: SILF codes have it in the front (rod-end) cover and SILB codes in the rear cover. The lock holds the piston at that end of the stroke while the port on the lock side is exhausted, so the rod does not move if the air supply is lost; air on that port releases it automatically, and a hand lever releases it manually. The catalog gives no holding-force figure for the lock.
SIL50 Technical Specifications
| Bore size | Ø50 mm |
|---|---|
| Stock strokes | 10 – 1200 mm |
| Catalog standard stroke | up to 1200 mm (longer on request) |
| Acting type | Double acting, with end lock |
| Lock position | Front cover (F) |
| Lock release | Automatic (air on the lock-side port) or manual lever |
| Port size | 1/4" (PT standard) |
| Piston rod / rod thread | Ø20 mm / M16×1.5 |
| 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 – 800 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.
Theoretical output force (Ø50 mm)
| Pressure | Push | Pull |
|---|---|---|
| 0.5 MPa | 982 N | 825 N |
| 0.7 MPa | 1374 N | 1155 N |
Push = pressure × bore area; pull subtracts the Ø20 mm rod area. Usable force is lower because of friction and back-pressure.
How the SIL50 Order Code Is Built
| SIL | Series: SI ISO 15552 cylinder with end lock |
|---|---|
| F | Lock position: F = front (rod-end) cover, B = rear cover |
| 50 | Bore in mm |
| X100 | Stroke in mm |
| S | Built-in magnet for position sensors (blank = none) |
| CA / TC | Mounting: CA single clevis, TC center trunnion |
| G | Port thread: G = G (BSPP), blank = PT |
All AirTAC SIL50 Order Codes (51)
Each order code links to its own datasheet page. Use Select to load it into the configurator above.
| Order code | Stroke (mm) | Mounting | Magnet · Thread | Price | Select |
|---|---|---|---|---|---|
| SILF50X10S | 10 mm | Basic (no mounting) | Front lock (F) · S · PT | $106.04 | |
| SILF50X25 | 25 mm | Basic (no mounting) | Front lock (F) · - · PT | $102.32 | |
| SILF50X25S | 25 mm | Basic (no mounting) | Front lock (F) · S · PT | $106.04 | |
| SILF50X35S | 35 mm | Basic (no mounting) | Front lock (F) · S · PT | $107.70 | |
| SILF50X40 | 40 mm | Basic (no mounting) | Front lock (F) · - · PT | $103.98 | |
| SILF50X50 | 50 mm | Basic (no mounting) | Front lock (F) · - · PT | $103.98 | |
| SILF50X50-S | 50 mm | Basic (no mounting) | Front lock (F) · S · PT | $107.75 | |
| SILF50X60 | 60 mm | Basic (no mounting) | Front lock (F) · - · PT | $106.30 | |
| SILF50X75 | 75 mm | Basic (no mounting) | Front lock (F) · - · PT | $106.30 | |
| SILF50X75S | 75 mm | Basic (no mounting) | Front lock (F) · S · PT | $110.02 | |
| SILF50X75CA | 75 mm | CA single clevis | Front lock (F) · - · PT | $115.61 | |
| SILF50X75STC | 75 mm | TC center trunnion | Front lock (F) · S · PT | $140.27 | |
| SILF50X80 | 80 mm | Basic (no mounting) | Front lock (F) · - · PT | $108.37 | |
| SILF50X80S | 80 mm | Basic (no mounting) | Front lock (F) · S · PT | $112.09 | |
| SILF50X100 | 100 mm | Basic (no mounting) | Front lock (F) · - · PT | $108.37 | |
| SILF50X100-S | 100 mm | Basic (no mounting) | Front lock (F) · S · PT | $111.89 | |
| SILF50X125 | 125 mm | Basic (no mounting) | Front lock (F) · - · PT | $110.70 | |
| SILF50X125S | 125 mm | Basic (no mounting) | Front lock (F) · S · PT | $114.42 | |
| SILF50X150 | 150 mm | Basic (no mounting) | Front lock (F) · - · PT | $112.81 | |
| SILF50X150S | 150 mm | Basic (no mounting) | Front lock (F) · S · PT | $116.54 | |
| SILF50X160 | 160 mm | Basic (no mounting) | Front lock (F) · - · PT | $115.14 | |
| SILF50X160S | 160 mm | Basic (no mounting) | Front lock (F) · S · PT | $118.87 | |
| SILF50X175 | 175 mm | Basic (no mounting) | Front lock (F) · - · PT | $115.14 | |
| SILF50X175S | 175 mm | Basic (no mounting) | Front lock (F) · S · PT | $118.87 | |
| SILF50X200 | 200 mm | Basic (no mounting) | Front lock (F) · - · PT | $117.21 | |
| SILF50X200S | 200 mm | Basic (no mounting) | Front lock (F) · S · PT | $120.94 | |
| SILF50X250 | 250 mm | Basic (no mounting) | Front lock (F) · - · PT | $121.66 | |
| SILF50X250S | 250 mm | Basic (no mounting) | Front lock (F) · S · PT | $125.38 | |
| SILF50X270S | 270 mm | Basic (no mounting) | Front lock (F) · S · PT | $129.77 | |
| SILF50X300 | 300 mm | Basic (no mounting) | Front lock (F) · - · PT | $126.05 | |
| SILF50X300-S | 300 mm | Basic (no mounting) | Front lock (F) · S · PT | $129.98 | |
| SILF50X350 | 350 mm | Basic (no mounting) | Front lock (F) · - · PT | $130.50 | |
| SILF50X350S | 350 mm | Basic (no mounting) | Front lock (F) · S · PT | $134.22 | |
| SILF50X400 | 400 mm | Basic (no mounting) | Front lock (F) · - · PT | $134.89 | |
| SILF50X400S | 400 mm | Basic (no mounting) | Front lock (F) · S · PT | $138.61 | |
| SILF50X400-TC | 400 mm | TC center trunnion | Front lock (F) · - · PT | $165.13 | |
| SILF50X450 | 450 mm | Basic (no mounting) | Front lock (F) · - · PT | $139.34 | |
| SILF50X450S | 450 mm | Basic (no mounting) | Front lock (F) · S · PT | $143.06 | |
| SILF50X500 | 500 mm | Basic (no mounting) | Front lock (F) · - · PT | $143.73 | |
| SILF50X500S | 500 mm | Basic (no mounting) | Front lock (F) · S · PT | $147.45 | |
| SILF50X600 | 600 mm | Basic (no mounting) | Front lock (F) · - · PT | $153.76 | |
| SILF50X600S | 600 mm | Basic (no mounting) | Front lock (F) · S · PT | $157.49 | |
| SILF50X700 | 700 mm | Basic (no mounting) | Front lock (F) · - · PT | $163.74 | |
| SILF50X700S | 700 mm | Basic (no mounting) | Front lock (F) · S · PT | $167.46 | |
| SILF50X800 | 800 mm | Basic (no mounting) | Front lock (F) · - · PT | $173.51 | |
| SILF50X800S | 800 mm | Basic (no mounting) | Front lock (F) · S · PT | $177.23 | |
| SILF50X900 | 900 mm | Basic (no mounting) | Front lock (F) · - · PT | $183.54 | |
| SILF50X900S | 900 mm | Basic (no mounting) | Front lock (F) · S · PT | $187.26 | |
| SILF50X1000 | 1000 mm | Basic (no mounting) | Front lock (F) · - · PT | $193.52 | |
| SILF50X1000S | 1000 mm | Basic (no mounting) | Front lock (F) · S · PT | $197.24 | |
| SILF50X1200S | 1200 mm | Basic (no mounting) | Front lock (F) · S · PT | $223.76 |
Need a combination that is not listed? Request a quote.
Where the SIL50 Is Used
General automation
About 982 N at 0.5 MPa covers most pushing, lifting and indexing tasks.
Holding at the stroke end
The lock keeps the rod at the locked end when the air supply is cut.
Vertical and inclined axes
Lifting units that must not drift down from the locked end when the air is off.
Choosing the Right SIL50 Configuration
Start with the stroke. Pick the exact travel your machine needs; a longer stroke adds length, weight and air consumption without adding force. If your length is not listed, request a quote and we will confirm whether it can be built.
Then choose the mounting. Basic (no code) uses the cylinder's own mounting holes. This bore is stocked with CA single clevis, TC center trunnion. Foot and flange mountings hold the cylinder rigid for straight-line loads; clevis and trunnion mountings let it pivot when the load moves in an arc.
Finally pick the version. It starts with the lock position: F locks the piston at the front (rod-end) cover, B at the rear cover, so choose the end where the load must be held (this bore is stocked with front locks only). Then: S adds a magnet for position sensors.
AirTAC SIL50 FAQ
Discontinued: AirTAC has replaced the SILF/SILB series with the SAILF/SAILB series. Every SILF/SILB code on this page is supplied as the current SAILF/SAILB with the same code after the prefix, for example SILF50X10S ships as SAILF50X10S. The specifications on this page are those of the SAILF/SAILB you receive. Older hyphenated codes are the same code: SILF50X50-S ships as SAILF50X50S.
The position of the lock. F has it in the front (rod-end) cover and holds the piston at that end of the stroke; B has it in the rear cover and holds the piston at the other end. Bore, force and mountings are the same.
Supply air to the port on the lock side and the lock releases automatically; it can also be released by hand with the lever. AirTAC advises against 3-position valves (closed or pressure center) for this cylinder, because pressure trapped on the lock side stops the lock from engaging.
No. Every SIL50 gives about 982 N push and 825 N pull at 0.5 MPa, whatever the stroke.
1/4" ports, PT thread as standard.
Basic plus CA single clevis, TC center trunnion. Use foot or flange for straight-line loads, clevis or trunnion when the cylinder must pivot.
Usually yes. Request a quote with the stroke, mounting and version and we will confirm whether it can be built, plus price and lead time.
0.15 to 1.0 MPa operating pressure (proof 1.5 MPa) and -20 to +70 °C on filtered air.
No. You can order a single SIL50. Orders are processed and handed to the carrier within 3-5 business days.
Buying the SIL50 from AirtacDistr
Genuine AirTAC parts
Every order code on this page is the AirTAC factory part number. Specifications follow the AirTAC Products Catalog 2026A. About us
Ready in 3-5 business days
That is our time to process the order and hand it to the carrier. No minimum order: a single piece can be ordered.
14-day returns, 1-year warranty
Return within 14 days of delivery; the buyer pays return shipping. The warranty covers defects not caused by misuse. Return policy
Engineering help
Send your application details and we will confirm the right order code, usually within 7-8 hours. Ask us
Page data checked against the live catalog on 2026-11-11.
Request a Quote for the SIL50
Send the order code, quantity and destination. We confirm price, stock and lead time, usually within 7-8 hours.