Bimba US-128.5 Ultran® Rodless Actuator Cylinder, 1-1/4" Bore 8-1/2" Stroke

Bimba Ultran® US-128.5 is a compact rodless pneumatic actuator designed for applications requiring linear motion in limited space, offering efficient force transfer without the need for a traditional piston rod. This unit features a 1-1/4 inch bore and an 8-1/2 inch stroke, with a robust aluminum body and stainless steel carrier system, ensuring durability, corrosion resistance, and smooth operation in industrial automation environments.
Manufacturer: Bimba Manufacturing Company
Model: US-128.5
Series: Ultran® Rodless Cylinder
Product Type: Rodless Pneumatic Actuator
Action Type: Double acting
Bore Size: 1-1/4 in (31.75 mm)
Stroke Length: 8-1/2 in (215.9 mm)
Cylinder Design: Rodless band-type cylinder
Actuation Method: Internal piston magnetically or mechanically coupled to external carriage
Body Material: Extruded aluminum alloy
Carriage Block Material: Aluminum block with integrated mounting surface
Rod/Carrier Material: Stainless steel (corrosion-resistant)
Sealing System: Sealing band with internal piston seal to prevent air leakage
Maximum Operating Pressure: 100 PSI (as indicated on label)
Operating Pressure Range: Typically 20 to 100 PSI (0.14 to 0.69 MPa)
Operating Medium: Clean, filtered compressed air
Temperature Range: -20°C to +80°C (non-freezing conditions)
Speed Range: Approximately 50 to 1500 mm/s depending on load and pressure
Cushioning: Limited or optional cushioning depending on configuration
Port Size: Typically 1/8" or 1/4" NPT (exact size depends on version)
Port Location: End-mounted ports integrated in body
Mounting Options: Direct body mounting or carriage mounting via threaded holes
Guidance: External carriage supports load; additional guidance recommended for high side loads
Lubrication: Pre-lubricated; additional lubrication optional
Stroke Accuracy: Standard industrial tolerance (approx. ±1 mm)
Weight: Approx. 1.5–2.5 kg (estimated for this configuration)
Manufacturing Country: United States
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