Precision Ground Bars for Air Cylinder Manufacturers

Precision Ground Bars supplies centerless-ground steel and alloy bar stock to air cylinder manufacturers for machining piston rods, actuator rods, shafts, guide rods, tie rods, pins, and other round components. Air cylinders convert compressed air into controlled motion, so the bar used for each moving or load-bearing component must match the required diameter, straightness, strength, surface condition, and operating environment.

Compared with standard round bar, precision ground bar stock provides a more consistent outside diameter, improved roundness, controlled straightness, and a smoother surface. These attributes give manufacturers a stable starting material for machining, help support repeatable fits, and reduce avoidable variation between finished cylinder components.

• Diameter consistency: A controlled outside diameter supports repeatable machining and helps rods, guides, bearings, and seals fit as designed.
• Straightness: Straighter bar stock helps limit runout, uneven movement, and vibration in long rods and linear-motion components.
• Roundness: Consistent round geometry supports balanced contact between the rod and its mating surfaces.
• Surface finish: A smooth, uniform surface can reduce additional preparation before machining, polishing, coating, or plating.

Materials and Grades for Cylinder Manufacturing

The correct material depends on the component’s load, wear, corrosion exposure, machining method, heat treatment, and finishing requirements. We process and supply round steel bar in stainless, alloy, and carbon steel grades for different air-cylinder designs and service conditions.

• Stainless steel bars: Available grades include 303, 304/304L, 316/316L, 410, 416, 420, and 17-4 PH for applications requiring different combinations of machinability, strength, hardness, and corrosion resistance.
• Alloy steel bars: Grades such as 4130, 4140/4142, and 8620 support components that require higher strength, hardenability, toughness, or wear resistance.
• Carbon steel bars: Grades including 1018, 1045, 1144, 1215, and 12L14 provide practical options for machinability, strength, and cost-sensitive production.

Submit the required grade or material specification with your drawing. Our team can confirm availability and the processing route needed to bring the bar to your requested condition.

Grinding and Secondary Processing to Match Your Specification

Our centerless grinding services include thru-feed and infeed grinding for round bars and components. Depending on the order, grinding can establish the required outside diameter, roundness, straightness, and surface finish before the material enters your production process.

Air cylinder manufacturers can also combine grinding with bar straightening, cutting, bar chamfering, polishing, plating, or custom packaging. Combining these operations under one order can reduce handling and provide bar stock prepared for the next manufacturing stage.

Ground Bar Applications in Air Cylinder Manufacturing

• Piston rods and actuator rods
• Linear shafts and guide rods
• Tie rods and structural rods
• Guide pins and alignment shafts
• Compact cylinder components
• Guided air cylinder components
• Rodless cylinder components
• Rotary actuator shafts
• Custom-engineered pneumatic components
• Hydraulic cylinder components

Contact Us Now

Tell us the grade, size, tolerance, quantity, and processing your application requires.

Send us your required material grade, diameter, length, tolerance, straightness, surface finish, quantity, and secondary-processing needs. Contact us directly or request a free quote for precision ground bar stock prepared for your air-cylinder manufacturing process.