Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X200-40SB
The AirTAC Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X200-40SB is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø125mm bore and 200mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ125 mm
- Full stroke200 mm
- Port sizePT3/8
- Adjuster threadM27×2.0
About the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X200-40SB
The AirTAC ACQJ125X200-40SB is a double-acting, single-rod JIS compact cylinder featuring a big-bore 125 mm design with a substantial 200 mm stroke. An external M27x2.0 threaded stop and lock nut permits on-machine extend end-position tuning, yielding a usable forward travel range of 160 to 200 mm. The retract movement remains completely unaffected by this adjustment. Because the piston area stays constant, output force equals that of a standard ACQ of identical bore size, delivering 6135.9 N of push and 5733.8 N of pull at 0.5 MPa.
This variant includes the -S magnet for compatibility with reed or solid-state electronic switches, alongside the -B male piston rod end (M30x1.5) that couples directly to your payload. Deceleration relies on a fixed NBR elastomer bumper at each end rather than a configurable air cushion. Operating pressure spans 0.15 to 1.0 MPa, with a proof rating of 1.5 MPa and a velocity range of 30-500 mm/s across a -20 to +70 C temperature spectrum.
Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X200-40SB Technical Specifications
| Model | Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X200-40SB |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø125 mm |
| Full stroke | 200 mm |
| Adjuster thread | M27×2.0 |
| Port size | PT3/8 |
| 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 | M22×2.5 (F) / M30×1.5 (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.
Theoretical Output Force (Ø125mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 6136 N | 5734 N |
| 0.7 MPa | 8590 N | — |
| Max (@1.0 MPa) | 1251 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.
Model Code: Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X200-40SB
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×200 | 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).
Where the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X200-40SB Is Used
Heavy Press Tonnage Calibration
Dial in the exact 160 to 200 mm down-stroke on a heavy-duty metal forming press during tooling setup, preventing over-travel without machining custom spacers.
Large Component Machining Clamps
Secure oversized castings or steel plates on a CNC machining center by tweaking the extend stop to match varying raw material dimensions on the fly.
Automated Welding Positioning
Index heavy structural frames into the weld zone accurately, using the external M27x2.0 adjuster to fine-tune the electrode landing distance between production batches.
Is the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X200-40SB the Right Cylinder?
If your application requires less thrust, stepping down to the 100 mm bore yields 3927.0 N push at 0.5 MPa; conversely, the 140 mm option provides 7696.9 N. Choose this 125 mm unit when your setup demands roughly 6135.9 N of forward force alongside variable stop positioning. A fixed-stroke ACQ cylinder is adequate if the end-of-travel location never changes. When ordering, verify the 125 mm bore, 200 mm full stroke, 40 mm adjustment window, -S magnet, and -B male rod thread.
Quick checklist
- ✓ Need on-machine end-position tuning?
- ✓ Full stroke and adjust window (mm)
- ✓ Force at your working pressure
- ✓ Magnet (S) for sensors?
- ✓ Female (blank) or male (B) rod thread
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Lock the adjuster nut after setting the stop.
- check The stop limits the EXTEND stroke only.
- check Avoid side load on the short piston rod.
- check Installation by qualified personnel per AirTAC docs.
Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X200-40SB FAQ
At 0.5 MPa, the push force is 6135.9 N and the pull force is 5733.8 N. At 0.7 MPa, the push force is 8590.3 N, with a maximum push of 1251 kgf at 1.0 MPa. The full stroke is 200 mm with a 40 mm adjustment window, giving a usable extend range of 160 to 200 mm. The piston rod is 32 mm, the port is PT3/8, and the external adjuster thread is M27x2.0.
The external threaded stop with a lock nut physically limits how far the rod extends, allowing you to shorten the forward stroke on the machine without swapping parts. It changes the stroke length only, so the output force remains identical to a standard ACQ of the same bore. Deceleration is handled by a fixed elastomer bumper at each end, not an adjustable air cushion; for high-energy loads, consider an external shock absorber or a rod lock for fail-safe holding.
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