HD1 Large Bore

Heavy Duty HD1 Large Bore Tie Rod Cylinders (NFPA)

Large Bore Cylinders For Abusive Conditions

Combining NFPA dimensional interchangeability and high quality components, the HD1 Large Bore Series offers excellent performance and long service life, even in the most severe of conditions. Mead offers 5-in., 8-in., 10-in. and 12-in. bore sizes to meet your needs.
Bore Diameter (in.) Thrust* Thrust Multiplier** Rod Diameter (in.) Max Operating Air Pressure Oil †
5 1964 19.64 1 or 1 3/8 250 900
8 5027 50.27 1 3⁄8 or 1 3⁄4 200 500
10 7854 78.54 1 3⁄4 or 2 200 400
12 11310 113.1 2 or 2 1⁄2 200 400

* Pushing force of cylinder at 100 PSI inlet pressure. Pulling force will be about 10% less due to the displacement of the piston rod. (Use 15% when Oversized Rods are chosen) Note: Actual realizable thrust could be somewhat lower due to side loading and internal friction. It is best to oversize you cylinder by about 25% to assure smooth operation.

** To determine cylinder thrust at other inlet pressures, multiply this factor times the desired inlet pressure.

†HD1 Cylinders are not rate or approved for use in a hydraulic circuit where an impulse or pressure spike may occur.

Large Bore Cylinder Construction

Rod Bearing:

Easily removable, held in place by socket head screws to assure easy replaceability without taking entire cylinder apart

Heads:

Precision broached steel blocks

Tubes:

Aluminum hard anodized to 60 Rc (16 RMS finish)

Piston:

Solid high alloy aluminum

Piston Rod:

100,000 PSI minimum yield steel, ground and polished hard chrome plated steel

Piston and Rod Seals:

Wear compensating Buna N vee rings.

Tube Seals:

Buna N o-rings

Rod Wiper

Dupont TeflonĀ®

Tie Rods:

Alloy steel for maximum strength.

Finish:

Black Paint