Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X250-30SB
The AirTAC Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X250-30SB is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø125mm bore and 250mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ125 mm
- Full stroke250 mm
- Port sizePT3/8
- Adjuster threadM27×2.0
About the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X250-30SB
The AirTAC ACQJ125X250-30SB is a double-acting, single-rod JIS compact cylinder featuring a big-bore 125mm design. An external threaded stop with a lock nut limits the EXTEND end position, allowing you to fine-tune the usable extend range from 220mm up to the full 250mm directly on the machine. The RETRACT stroke remains completely unaffected by this adjustment. Because the piston area is unchanged, the output force is IDENTICAL to a standard ACQ of this bore, delivering 6135.9N push at 0.5MPa.
This model includes a male M30x1.5 piston rod end (B) for direct load coupling and a built-in piston magnet (S) for position sensing. The magnetic-switch grooves accept both reed and solid-state electronic switches. Operating pressure spans 0.15-1.0 MPa, and the unit relies on a fixed NBR elastomer bumper at each end for end-of-stroke deceleration rather than an adjustable air cushion.
Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X250-30SB Technical Specifications
| Model | Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X250-30SB |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø125 mm |
| Full stroke | 250 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 ACQJ125X250-30SB
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×250 | 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 ACQJ125X250-30SB Is Used
Press Tooling Changeover
Adapts the extend endpoint during die swaps in metal forming presses, ensuring precise bottom-dead-center contact without machining new spacers.
Heavy Material Handling
Sets varying push-off distances for large automotive component ejection systems, tuning the 220-250mm window to match part geometry.
Palletizer Flap Control
Adjusts the platen extend position on the fly for different pallet sizes or box heights, maintaining consistent sealing pressure.
Is the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X250-30SB the Right Cylinder?
When sizing this big-bore 125mm unit, consider the neighbouring bores: the 100mm variant yields 3927.0N push, while the 140mm provides 7696.9N at 0.5MPa. If your extend position never varies and requires no on-machine tweaking, a fixed-stroke ACQ cylinder is sufficient. To order this adjustable version correctly, confirm the 125mm bore, 250mm full stroke, 30mm window, the -S magnet, and the -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 ACQJ125X250-30SB FAQ
The usable extend range is 220-250mm (full 250mm stroke minus the 30mm window). Force is unchanged from a standard ACQ: 6135.9N push and 5733.8N pull at 0.5MPa, 8590.3N push at 0.7MPa, and a maximum push of 1251 kgf at 1.0MPa.
An external M27x2.0 threaded stop with a lock nut limits the extend distance only; the retract stroke is unaffected. The cylinder uses a fixed NBR elastomer bumper for deceleration, not an adjustable air cushion. The -S magnet works with reed or solid-state electronic switches.
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Covers non-human-caused product damage.
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Standard models usually ship in 3-4 days.
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Related AirTAC ACQJ Compact Cylinders
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