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Style 1400 Glass-Filled PTFE Piston Seal, 3.25 Inch Bore Diameter, 2.86 Inch Groove Diameter, Inch Groove Width

Bore 3.25	Bore Tolerance (in) ±0.002	Cross Section Tolerance (in) ±0.010	Brand Hercules Sealing Products	Brand Hercules Sealing Products	Pack Size 1.00	UOM EA	Groove Dia. E 2.86	Groove Width Tolerance (in) ±0.002	Piston Dia. F 3.25	Piston Dia. Tolerance (in) ±0.001	Seal Height Tolerance (in) ±0.010	Supplier Part Number PS1400-52	Alternate Part Numbers Alternate Part Number C1DH51, Alternate Part Number MI-01035328, Alternate Part Number MINO-00407X30026	Product Weight 0.06 lbs

Product Questions & Answers 3

Product Questions & Answers

got a cylinder with a 3.25 bore, will this seal sit right in a 2.86 groove or am i askin for trouble

Question by: Tommy M on Jun 4, 2025, 10:10 AM

Fit wise, it’s made around a 3.25 inch bore and a 2.858 inch groove diameter. The bore and groove dimensions are held to tight tolerances, ±0.002 inch on the bore and groove width, with a piston diameter listed at 3.246 inch ±0.001, so it’s intended to be a precise match when your hardware is built to those numbers.

Answer by: Customer Support on Jun 6, 2025, 9:28 AM

What kinda pressure can this thing handle?

Question by: Wes C on Jan 16, 2026, 8:44 PM

It's rated to handle pressures up to 5,000 PSI, so it should hold up in most hydraulic systems without any trouble.

Answer by: Customer Support on Jan 18, 2026, 6:38 PM

Got a cylinder with a 3.25 bore that needs a new piston seal, will the PS1400-52 drop right in, or is there more to it than that?

Question by: Tommy T on Jun 18, 2025, 4:23 PM

For a 3.25-inch bore, this one is sized to fit with a piston diameter of 3.246 inches and a groove diameter of 2.858 inches. The bore and groove tolerances are held to plus or minus 0.002 inches, so as long as your cylinder groove matches those dimensions, you should get a solid, reliable fit. Worth double-checking your groove width against the spec before ordering just to be sure everything lines up.

Answer by: Customer Support on Jun 20, 2025, 8:08 AM

Similar Products

Model Number	Bore	Groove Dia. E	Piston Dia. F	Bore Tolerance (in)	Cross Section Tolerance (in)	Seal Height Tolerance (in)	Piston Dia. Tolerance (in)	Groove Width Tolerance (in)
PS1400-40	2.5	2.108	2.496	±0.002	±0.010	±0.010	±0.001	±0.002
PS1400-56	3.5	3.108	3.496	±0.002	±0.010	±0.010	±0.001	±0.002
PS1400-80	5	4.608	4.996	±0.002	±0.010	±0.010	±0.001	±0.002
PS1400-24	1.5	1.24	1.497	±0.002	±0.005	±0.005	±0.001	±0.002
PS1400-26	1.625	1.233	1.622	±0.002	±0.010	±0.010	±0.001	±0.002
PS1400-28	1.75	1.358	1.747	±0.002	±0.010	±0.010	±0.001	±0.002
PS1400-32	2	1.608	1.996	±0.002	±0.010	±0.010	±0.001	±0.002
PS1400-36	2.25	1.858	2.246	±0.002	±0.010	±0.010	±0.001	±0.002
PS1400-44	2.75	2.358	2.746	±0.002	±0.010	±0.010	±0.001	±0.002
PS1400-48	3	2.608	2.996	±0.002	±0.010	±0.010	±0.001	±0.002
PS1400-52	3.25	2.858	3.246	±0.002	±0.010	±0.010	±0.001	±0.002
PS1400-60	3.75	3.358	3.746	±0.002	±0.010	±0.010	±0.001	±0.002
PS1400-64	4	3.608	3.996	±0.002	±0.010	±0.010	±0.001	±0.002
PS1400-72	4.5	4.108	4.496	±0.002	±0.010	±0.010	±0.001	±0.002
PS1400-96	6	5.482	5.996	±0.002	±0.005	±0.005	±0.001	±0.002