Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X50-50SB
The AirTAC Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X50-50SB is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø125mm bore and 50mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ125 mm
- Full stroke50 mm
- Port sizePT3/8
- Adjuster threadM27×2.0
About the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X50-50SB
The AirTAC ACQJ125X50-50SB is a double-acting, single-rod JIS compact cylinder from the big-bore range. An external M27x2.0 threaded stop with a lock nut restricts the extend end position, giving a usable forward range of 0-50 mm. The retract stroke remains completely unaffected. A Ø32 mm piston rod and PT3/8 porting handle substantial pneumatic loads.
Output force stays identical to a standard ACQ of this bore, as the adjustment alters travel length without changing piston area. You get 6135.9 N push and 5733.8 N pull at 0.5 MPa. The unit includes fixed NBR elastomer bumpers at each end for end-of-stroke deceleration, and the built-in magnet (-S) supports reed or solid-state sensing.
Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X50-50SB Technical Specifications
| Model | Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X50-50SB |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø125 mm |
| Full stroke | 50 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 ACQJ125X50-50SB
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×50 | 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 ACQJ125X50-50SB Is Used
Heavy Press Tonnage Setup
Dial in the exact 0-50 mm extend position during press commissioning without machining custom spacers or changing the cylinder body.
Automated Line Changeover
Swiftly alter the forward stop limit when switching between heavy product variants on a shared assembly fixture.
Large Welding Fixture Trial
Test and set precise end positions for large robotic welding clamps directly on the factory floor before finalizing the mechanical stops.
Is the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X50-50SB the Right Cylinder?
Choosing this Ø125 bore yields 6135.9 N push at 0.5 MPa. Stepping down to a Ø100 bore provides 3927.0 N push, while moving up to a Ø160 bore offers 10053.1 N push. If your setup never requires modifying the end position, a fixed-stroke ACQ125 cylinder is sufficient. When ordering, confirm the 50 mm full stroke, 50 mm adjuster window, male M30x1.5 rod thread (-B), and the integrated magnet (-S).
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 ACQJ125X50-50SB FAQ
Push force is 6135.9 N and pull is 5733.8 N at 0.5 MPa, with 8590.3 N push at 0.7 MPa and a maximum push of 1251 kgf at 1.0 MPa. The usable extend range is 0-50 mm (50 mm full stroke minus a 50 mm window). The external adjuster features an M27x2.0 thread.
No, the stop only shortens the extend stroke; force remains identical to a standard ACQ because the piston area is unchanged. The cylinder uses fixed NBR elastomer bumpers for deceleration, not an adjustable air cushion or rod lock. For fail-safe load holding on air loss, install an external rod lock or pilot-operated check valve.
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Related AirTAC ACQJ Compact Cylinders
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