The AirTAC Airtac SC Standard Cylinders SC50X135HT is a genuine double-acting standard air cylinder with a Ø50mm bore and 135mm stroke, PT1/4 air ports and adjustable end cushioning. It is used for push, pull, lift and clamp motion in industrial automation.
The AirTAC SC50X135HT is a 50 mm bore, double-acting tie-rod cylinder built with NPT 1/4 tapered ports, the thread standard that seals on the pipe threads themselves and is the usual choice for North-American machinery and retrofit work. The 135 mm stroke is a made-to-order length cut between the catalog 125 and 150 mm standards, so confirm lead time when you request a quote. At 0.5 MPa this bore delivers about 982 N on extension and 825 N on retraction, rising to 1767 N at the 0.9 MPa operating limit. The piston carries a 21 mm adjustable cushion, a 20 mm rod with M16x1.5 knuckle thread, and the 150 mm body length A gives an extended length of roughly 285 mm - compact enough for tight machine frames where a full ISO-profile body would not fit.
| Model | Airtac SC Standard Cylinders SC50X135HT |
|---|---|
| Series | SC standard tie-rod cylinder |
| Bore size | Ø50 mm |
| Stroke | 135 mm |
| Acting type | Double acting |
| Port size | PT1/4 |
| Rod thread | M16×1.5 |
| Fluid | Air (filtered by 40µm 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, 21 mm |
| Max stroke | Up to 1200 mm |
Specifications follow the official AirTAC SC series datasheet. Operating pressure 0.15–1.0 MPa, proof pressure 1.5 MPa, temperature −20 to +70 °C. Confirm against the product label before installation. Thread options: PT (standard) / G.
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 982 N | 825 N |
| 0.7 MPa | 1374 N | — |
| Max (approx.) | 200 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
| SC | Standard tie-rod cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×135 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Related variants: SCD (double rod), SCJ (adjustable stroke), SCT (multi-position). Seals: TPU standard / H = Viton / N = NBR. Thread: blank = PT, G = G thread.
A 135 mm stroke is the sweet spot for sliding chip-auger gates on CNC machining centers: enough travel to fully open a 120 mm discharge cutout, with the 982 N push class at 0.5 MPa overcoming gate rail friction and packed-swarf drag.
At 1767 N at 0.9 MPa the 50 mm bore crimps light-duty hydraulic and pneumatic hose ferrules on manual benches, where a heavier 63 mm bore would overdrive the die and mark the shell.
North-American packaging OEMs spec NPT ports throughout; this cylinder pushes cartons between conveyor lanes at 30-800 mm/s, and the 21 mm adjustable cushion stops the diverter plate without slamming at high cycle rates.
Size check both ways: one bore down, the SC40 (NPT variant SC40T) gives 628 N at 0.5 MPa - fine below ~600 N loads; one bore up, the SC63 (1559 N at 0.5 MPa) if your load plus friction margin exceeds roughly 900 N. The 135 mm stroke sits between standard lengths, so either accept the made-to-order charge or re-check whether 125 mm would clear your fixture. Port thread matters here: the HT suffix means NPT 1/4 tapered, not the standard PT (Rc). Match it to your existing fittings, manifold blocks and regional plumbing - if your plant runs G/BSPP hardware with bonded-washer seals, order the G variant instead of adapting threads. Replacement match needs five points: bore, stroke, port thread (NPT/PT/G), mounting accessory (LB, FA, FB, CA, CB, TC, TCM1) and magnet (-S). Add -S to this code if you need CMSG/DMSG/EMSG position sensing.
Quick checklist
At 0.5 MPa supply: 982 N pushing and 825 N pulling. At 0.9 MPa (the top of the 0.15-1.0 MPa operating band): 1767 N pushing. The theoretical maximum at 1.0 MPa is 200 kgf. Derate 10-20% for real-world friction and side load, and remember the return stroke is weaker because the rod side of the 20 mm piston rod reduces effective area.
Mechanically the HT matches an SC50 of the same stroke - 20 mm rod, M16x1.5 rod thread, 21 mm cushion, 150 mm body length A - but the ports are NPT 1/4 tapered, not PT. NPT seals on the thread cone, PT on a slightly different taper, so mixing standards risks weeping joints. If your plumbing is PT or G/BSPP, order the matching variant rather than using adapters; otherwise verify bore, stroke, mounting accessory and magnet (-S) line up for a like-for-like replacement.
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