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Style 1850 Bronze Filled PTFE Piston Seal, 3.00 Inch Bore Diameter, 2.44 Inch Groove Diameter, Inch Groove Width

Bore 3	Bore Tolerance (in) +0.002/-0	Cross Section Tolerance (in) +0.006 / -0	Brand Hercules Sealing Products	Brand Hercules Sealing Products	Pack Size 1.00	UOM EA	Groove Dia. E 2.44	Groove Width Tolerance (in) ±0.002	Piston Dia. F 3.00	Piston Dia. Tolerance (in) +0/-0.006	Seal Cross Section C 0.09	Seal Height B 0.27	Seal Height Tolerance (in) +0.005 / -0	Supplier Part Number PS1850-48	Alternate Part Numbers Alternate Part Number C1KM93	Product Weight 0.06 lbs

Product Questions & Answers 2

Product Questions & Answers

trying to swap over from a PS1800 style piston seal, is this 1850 one gonna interchange without a bunch of fuss?

Question by: Wes J on Apr 4, 2026, 6:44 AM

The Style 1850 seal is called out as interchangeable with the PS1800 style piston seal. It is a bronze filled PTFE seal with a rubber energizer, intended for piston sealing in hydraulic service.

Answer by: Customer Support on Apr 5, 2026, 10:11 AM

Got a cylinder with a 3-inch bore that needs a new piston seal, this bronze PTFE style gonna fit right, or do I need to check anything before I order?

Question by: Sheila B on Jun 28, 2025, 9:27 PM

For a 3.00-inch bore, this seal is built to spec with a piston diameter of 2.999 inches and a bore tolerance of +0.002/-0. The groove diameter runs 2.44 inches with a groove width tolerance of plus or minus 0.002 inches. One thing worth knowing is that the piston diameter given assumes a piston with no wear. If there's been any wear on your piston, you'll want to measure the actual diameter before assuming it'll fit clean.

Answer by: Customer Support on Jun 30, 2025, 7:33 AM

Similar Products

Model Number	Bore	Seal Height B	Seal Cross Section C	Groove Width D	Groove Dia. E	Piston Dia. F	Bore Tolerance (in)	Piston Dia. Tolerance (in)	Cross Section Tolerance (in)	Groove Width Tolerance (in)	Seal Height Tolerance (in)	Price	Buy Now
PS1850-48	3	0.269	0.087		2.44	2.999	+0.002/-0	+0/-0.006	+0.006 / -0	±0.002	+0.005 / -0
PS1850-96	6	0.362	0.142		5.238	5.999	+0.002/-0	+0/-0.007	±0.005	±0.002	+0.005 / -0