
The AirTAC Airtac Adjustable Compact Cylinder ACQJ50~63 ACQJ50X100-75SB is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø50mm bore and 100mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
The AirTAC ACQJ50X100-75SB is a double-acting JIS compact cylinder with an external threaded stop and lock nut that limits the extend end position. You can tune the usable extend range from 25 mm up to the full 100 mm directly on the machine without swapping parts, while the retract stroke remains unaffected. It includes a male piston rod thread (M18x1.5) and a built-in magnet (-S) for position sensing.
Because the adjuster only restricts travel length and leaves piston area unchanged, output force equals a standard ACQ of this bore. At 0.5 MPa it delivers 981.8 N of push and 824.6 N of pull. The unit uses a PT1/4 port, runs at 30-500 mm/s, and relies on a fixed NBR elastomer bumper at each end for end-of-stroke deceleration.
| Model | Airtac Adjustable Compact Cylinder ACQJ50~63 ACQJ50X100-75SB |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø50 mm |
| Full stroke | 100 mm |
| Adjuster thread | M16×1.5 |
| Port size | PT1/4 |
| 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 – 500 mm/s |
| Rod thread | M10×1.5 (F) / M18×1.5 (B) |
Specifications follow the official AirTAC ACQJ datasheet. The adjustable stop shortens the EXTEND stroke only; the piston area — and therefore the force — is the same as a standard ACQ of this bore. Adjustable window options: 10/20/30/40/50/75/100 mm.
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 982 N | 825 N |
| 0.7 MPa | 1374 N | — |
| Max (@1.0 MPa) | 200 kgf | |
Force equals a standard ACQ of the same bore — the adjuster changes stroke length, not piston area. Actual usable force is lower due to friction; size with a safety margin.
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×100 | Full stroke length in mm. |
| -0 | Adjustable window in mm (extend stroke can be shortened by up to this). |
| S / B | Magnet (S) / male-thread rod (B); omit for none / female thread. |
Thread: PT standard (G / NPT available). Related: ACQ (fixed stroke), ACQD (double rod), TACQ (guided / non-rotating).
Dial in the extend stop from 25 to 100 mm during CNC fixture swaps, letting operators set new part end positions rapidly without fabricating custom spacers.
Adjust the sealing head descent on packaging lines to accommodate varying box heights, using the external stop to prevent over-travel and crushing.
Trial different insertion depths on an assembly press by turning the external adjuster nut, verifying the exact 981.8 N push before committing to a fixed stroke.
If you need less thrust, the 40 mm bore provides 628.3 N push at 0.5 MPa, whereas the larger 63 mm bore yields 1558.6 N. Choose this 50 mm bore when your fixture demands roughly 981.8 N of extension force and an adjustable end stop from 25 to 100 mm. If the exact 100 mm extend position never varies, a fixed-stroke ACQ cylinder is sufficient. To order, confirm the 50 mm bore, 100 mm full stroke, 75 mm adjust window, S magnet, and B male rod thread.
Quick checklist
It has a 50 mm bore, 100 mm full stroke, and a 75 mm adjustable window, giving a usable extend range of 25-100 mm. Force is identical to a standard ACQ: 981.8 N push and 824.6 N pull at 0.5 MPa, 1374.4 N push at 0.7 MPa, and a maximum push of 200 kgf at 1.0 MPa. The port size is PT1/4.
An external M16x1.5 threaded stop with a lock nut limits the extend travel, shortening the stroke without changing piston area, so force stays the same. The retract stroke is unaffected. Deceleration relies on a fixed NBR elastomer bumper at each end, not an adjustable air cushion. The built-in -S magnet works with reed or solid-state electronic switches.
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