4MA/4ML Series Tie Rod Cylinders, 6" & 8" Bore Sizes | NFPA | Parker




  • Industry leading aluminum NFPA interchangeable cylinder with flexible construction
  • Removable bronze alloy gland/bearing for easy maintenance
  • Tube and tie rod construction for heavy duty use
  • Cushions - optional and adjustable at either end or both ends (N/A for 4ML hydraulic version)
  • Strokes available in any practical stroke length

Operating Information:

Operating pressure -

  • 4MA: 250 PSI (17 bar) maximum air service
  • 4ML: 400 PSI (27 bar) maximum hydraulic service

Temperature range -

  • Standard seals: -10°F to 165°F
  • Fluorocarbon seals: -10°F to 250°F
  • Lower temperature seals: -50°F to 150°F

General Specifications:

  • Bore sizes - 6" and 9"
  • Rod diameters - 1-3/8" and 1-3/4"
  • 4 standard rod end styles; specials available
  • Single or double rod ends
  • 20 standard mounting styles
  • RoHS compliant

Material Specs Options and Modifications Mounting Styles


Material Specifications for Standard Temperatures and Applications

Head and Cap Black anodized aluminum alloy
Cylinder Body Clear hard-coat anodized aluminum alloy
Piston Rod Case-hardened, chrome plated carbon steel
Rod Seal Carboxylated nitrile (Nitroxile)
Rod Wiper Molythane
Rod Bearing (Gland) Bronze alloy
Piston Aluminum alloy
Piston Seals Carboxylated nitrile (Nitroxile)
Piston Bearing MolyGard™
Magnetic Ring Plastic-bound magnetic material
Piston Fastener Piston rod for aluminum piston
O-Rings Nitrile
End Seals Nitrile
Cushion Seals Urethane
Cushion Needle Valves Brass
Tie-Rods Blackened carbon steel
Tie-Rod Nuts Steel alloy, SAE J995 Grade 8

Options and Modifications:

  • Adjustable cushions
  • Magnetic piston
  • Port and adjustable cushion relocation
  • Port thread styles
  • Multiple ports
  • Special heads, caps, pistons and mounts
  • Double rod end
  • Oversize rod diameters
  • Rod end modifications
  • Rod materials (grades of stainless steel)
  • Stainless steel tie rods and nuts
  • Fluorocarbon rod wiper and rod seal only
  • Fluorcarbon seals (all cylinder seals)
  • Metallic rod wiper
  • HI LOAD gland assembly
  • Stop tube
  • Mixed mountings
  • Shock absorber on cap end
  • Air cylinder/valve combination (ACVB)
  • Adjustable point sensors
  • Continuous linear position sensing (LPSO)
  • High temperature service (to 250°F)
  • Low temperature service (to -50°F)
  • Hydraulic service (4ML - 400 PSI)
  • Rod lock version (see 4MAJ)

(For a guided version of the 4MA/4ML Series, please see the HB Series page.)

Mounting Styles - Dimensions:


Available Pneumatic Cylinder Styles

Tie-rod air cylinder - non-rotating Tie Rod Cylinders
Round Body Cylinders
Compact Cylinders
Guided Cylinders
Rodless Cylinders


Quote by Part Number Help with Cylinder Identification

Engineering & Product Selection Information

Pneumatic Product Selection

  • Pneumatic Actuators & Air Cylinders
  • Pneumatic Cylinders
  • Automation Products: rotary actuators, grippers, slide tables, rotary tables, escapement
  • Actuator Accessories: Linear alignment couplers, flow controls, air oil tanks, rodlocks, electronic sensors, shock absorbers

Application Engineering Data


California Prop 65 Warning WARNING: These products can expose you to chemicals including lead and/or DEHP and/or carbon black, which are known to the State of California to cause cancer or birth defects or other reproductive harm.  For more information go to www.P65Warnings.ca.gov