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End clearance on piston rings depends on ring design, material andapplication. The following end clearances are provided as a standard for hydraulic cylinder applications. When using iron piston rings, it is crucial to use the correct groove design for proper performance of the cylinder. Please use the following guidelines when cutting an iron piston ring groove.
GROOVE WIDTH: To permit the ring to slide freely into the groove, the groove must be at least 0.001” wider than the maximum piston ring width with a tolerance of +0.003”/-0.000”.
GROOVE DEPTH: Grooves must be at least 0.015” deeper than the maximum radial wall thickness of the piston ring with a tolerance of +0.003”/-0.000”. This is to avoid any possibility of the ring bottoming in the groove when the ring is compressed to its working diameter.
RADIAL CLEARANCE: The radial clearance between the cylinder bore and piston should be less than 1/3 of the radial wall thickness of the piston ring to ensure sealing effectiveness.
Iron Material | 0.142 in Cross Section | Piston Seal
LW-STL-10-1/4×1/8sq.-C/S
MCPO-95 has a 95 mm diameter with Standard Chrome. The base material is 1045 Carbon Steel with a yield strength of 75,000 psi.
ASTM A108 is the most commonly used and economical grade of shafting for hydraulic cylinder components, blower shafts, and mandrels.
- Extremely smooth surface finish
- Excellent wear and corrosion resistance
- Good strength and impact properties
- Good machinability
- Reasonable weldability
- Fair response to normal heat treating and induction hardening practices
Full mill lengths will be cut to lengths between 12 ft and 19 ft long. Packages longer than 44 inches may have additional freight charges.
| 1-29 | $24.88 |
| 30-59 | $17.79 |
| 60-119 | $13.81 |
| 120-287 | $12.44 |
| 288+ | $11.32 |
MHT-55X2.750 has a wall thickness of 7.425 mm. The ID is 55 mm and the OD is 69.85 mm. The material is 1026 Carbon Steel and has been stress-relieved and annealed.
Full mill lengths will be cut to lengths between 12 ft and 19 ft long. Packages longer than 44 inches may have additional freight charges.
| 1-14 | $10.01 |
| 15-74 | $7.77 |
| 75-104 | $7.00 |
| 105+ | $6.37 |
Style ST-XL wipers are molded from premium urethane and are direct replacements for Style “ST” or “D” wipers. The outside diameter of the ring has a crush lip providing extra interference in the groove. A bead on the shoulder stops contaminates from entering through the groove. The inside diameter is ribbed to prevent pressure traps between the wiper and rod seal.
94A Durometer | Urethane Material | 3 1/2 in Nominal Inner Diameter
Features
- Crush lip to provide extra interference
- Bead on the shoulder to keep contaminants out
- Ribbed ID to prevent pressure traps
HT-7000X6000 has a wall thickness of 0.5 in. The ID is 6 in and the OD is 7 in. The material is DOM 1026 Carbon Steel and has been stress-relieved and annealed.
Full mill lengths will be cut to lengths between 12 ft and 19 ft long. Packages longer than 44 inches may have additional freight charges.
| 1-14 | $17.77 |
| 15-59 | $15.53 |
| 60-89 | $13.79 |
| 90+ | $12.43 |
Style ST-XL wipers are molded from premium urethane and are direct replacements for Style “ST” or “D” wipers. The outside diameter of the ring has a crush lip providing extra interference in the groove. A bead on the shoulder stops contaminates from entering through the groove. The inside diameter is ribbed to prevent pressure traps between the wiper and rod seal.
94A Durometer | Urethane Material | 4 1/2 in Nominal Inner Diameter
Features
- Crush lip to provide extra interference
- Bead on the shoulder to keep contaminants out
- Ribbed ID to prevent pressure traps
HWT-7500X4000 has a wall thickness of 1.75 in. The ID is 4 in and the OD is 7.5 in. The material is 1026 Carbon Steel.
Heavy Wall Tubes are used for machining high strength and close tolerance parts like bushings, axles, hydraulics, and sleeves.
Full mill lengths will be cut to lengths between 12 ft and 19 ft long. Packages longer than 44 inches may have additional freight charges.
| 1-4 | $31.25 |
| 5-14 | $27.31 |
| 15-24 | $24.25 |
| 25-49 | $21.85 |
| 50+ | $19.88 |
O-rings as elastic loops that seal static and dynamic applications. They are used to seal the space between cylinders, pistons, pipes and tubes and can be made from various materials.
70 Durometer | Buna-N Rubber Material | 2 5/8 in Nominal Inner Diameter | 1/16 in Cross Section | O-Ring
Features
- Pressure range varies according to diametral clearance
- Temperature range of -40 °F to -240 °F
O-rings as elastic loops that seal static and dynamic applications. They are used to seal the space between cylinders, pistons, pipes and tubes and can be made from various materials.
90 Durometer | Buna-N Rubber Material | 1 3/4 in Nominal Inner Diameter | 1/8 in Cross Section | O-Ring
Features
- Pressure range varies according to diametral clearance
- Temperature range of -40 °F to -240 °F
