Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X250-50B
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X250-50B is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø40mm bore and 250mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ40 mm
- Full stroke250 mm
- Port sizePT1/8
- Adjuster threadM12×1.25
About the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X250-50B
The AirTAC ACQJ40X250-50B is a double-acting, single-rod JIS compact cylinder built for exact extend positioning. An external M12x1.25 threaded stop and lock nut lets you trim the forward stroke on the machine, yielding a usable extend range of 200 to 250 mm. The return stroke remains fixed at its full length. Because the adjuster only limits travel, the piston area is unaltered, delivering force identical to a standard ACQ of this bore.
This unit features a 250 mm stroke, making it a long-stroke made-to-order variant that exceeds the 100 mm standard maximum for a 40 mm bore. It includes a male M14x1.5 piston rod end for direct load coupling and PT1/8 ports. Deceleration relies on a fixed NBR elastomer bumper at each end rather than an adjustable air cushion, so external shock absorbers are advised for high-energy loads. The body retains sensor grooves, though this specific SKU ships without a magnet.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X250-50B Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X250-50B |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø40 mm |
| Full stroke | 250 mm |
| Adjuster thread | M12×1.25 |
| Port size | PT1/8 |
| 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 | M8×1.25 (F) / M14×1.5 (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 (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (@1.0 MPa) | 128 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 ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X250-50B
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 40 | 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 ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X250-50B Is Used
Machining Fixture Stops
Dial in the extend end position on a CNC machining fixture to accommodate raw material thickness variations without swapping out cylinder hardware.
Product Changeover Diverters
Adjust the stroke on a conveyor sorting diverter to handle different package dimensions during rapid production line changeovers.
Assembly Press Trial
Set trial end positions on an automated assembly press to find the exact 200 to 250 mm reach before locking down the external stop nut.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X250-50B the Right Cylinder?
When sizing this 40 mm bore actuator, dropping down to a 32 mm bore yields 402.1 N push force at 0.5 MPa, while stepping up to a 50 mm bore provides 981.8 N. Choose this model if your fixture requires a 250 mm forward travel but needs on-the-fly end-position tuning within the 50 mm window. If exact travel is fixed and known, a standard ACQ cylinder without the external stop is a simpler choice. Confirm your ordering essentials: 40 mm bore, 250 mm full stroke, 50 mm adjuster window, male rod thread (-B), and no magnet.
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 ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X250-50B FAQ
It delivers 628.3 N push and 527.8 N pull at 0.5 MPa, 879.6 N push at 0.7 MPa, and a maximum push of 128 kgf at 1.0 MPa. The full stroke is 250 mm with a 50 mm adjustable window, giving a usable extend range of 200 to 250 mm.
The external M12x1.25 threaded stop with lock nut limits only the extend travel, meaning force is identical to a standard ACQ. The cylinder uses a fixed NBR bumper for deceleration, not an air cushion, and a plain ACQ will not hold its load on air loss, requiring an external rod lock for fail-safe holding.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models usually ship in 3-4 days.
Fast Reply
Most inquiries answered within 7-8 hours.
Related AirTAC ACQJ Compact Cylinders
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