Cast Iron Piston Ring, 7.00 Inch OD, 0.249 Inch Width, 0.24 Inch Wall Thickness

Brand
Hercules Sealing Products
Brand
Hercules Sealing Products
Pack Size
1.00
UOM
EA
O.D.
7 in
Supplier Part Number
SPR-7002
Wall Thickness
0.24
Product Weight
0.32 lbs
Alternate Part Numbers
Alternate Part Number C1GG42

Product Questions & Answers

got a hydraulic cylinder here with a 7-inch bore and the piston ring groove needs to be cut right, what clearances am I working with on the groove depth and width for this ring?
Question by: Danny H on Feb 8, 2026, 11:30 AM
Groove depth needs to be at least 0.015 inches deeper than the maximum radial wall thickness of the ring, with a tolerance of plus 0.003, minus nothing. That extra depth keeps the ring from bottoming out in the groove once it gets compressed down to working diameter. On the width side, cut the groove at least 0.001 inches wider than the maximum ring width, same tolerance of plus 0.003, minus nothing. That gives the ring enough room to slide freely without binding up during operation.
Answer by: Customer Support on Feb 10, 2026, 7:58 AM
got a piston cut for a 7 inch ring, is this one actually 7.00 OD and about a quarter inch wide?
Question by: Bobby B on Apr 5, 2026, 4:43 PM
The key dimensions on this ring are a 7.00 inch outside diameter and a 0.249 inch width. It is a cast iron piston ring, sold under SKU SPR-7002, with alternate part number C1GG42.
Answer by: Customer Support on Apr 7, 2026, 9:32 AM

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