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Style 1400 Glass-Filled PTFE Piston Seal, 1.75 Inch Bore Diameter, 1.36 Inch Groove Diameter, Inch Groove Width

Bore 1.75	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 1.36	Groove Width Tolerance (in) ±0.002	Piston Dia. F 1.75	Piston Dia. Tolerance (in) ±0.001	Seal Height Tolerance (in) ±0.010	Supplier Part Number PS1400-28	Alternate Part Numbers Alternate Part Number C1DH44, Alternate Part Number MI-01034909, Alternate Part Number MINO-00407X30007	Product Weight 0.01 lbs

Product Questions & Answers 3

Product Questions & Answers

What kind of pressures can this seal handle, like if I'm pushing it pretty hard?

Question by: Roy G on Sep 12, 2025, 7:42 AM

This seal is rated to handle pressures up to 5,000 PSI, so it should hold up well even in demanding hydraulic systems.

Answer by: Customer Support on Sep 13, 2025, 1:59 PM

Trying to figure out if this seal can hold up in a system running close to 5,000 PSI pretty regular. We push it hard and can't afford a seal failing mid-cycle.

Question by: Kirk A on Sep 9, 2025, 5:59 PM

At 5,000 PSI, you're right at the top of what this seal is rated for, so it can technically handle that pressure. The 15% glass-filled PTFE construction gives it more structural strength than standard PTFE, and the rubber energizer keeps consistent sealing force across the pressure range. That said, if your system is hitting 5,000 PSI as a sustained normal condition rather than occasional peaks, make sure your cylinder bore and piston dimensions line up tight with the specs. Bore diameter is 1.75 inches with a tolerance of plus or minus 0.002, and piston diameter should be 1.747 inches within plus or minus 0.001. Sloppy fits at high pressure will wear the seal faster regardless of material.

Answer by: Customer Support on Sep 11, 2025, 10:18 AM

trying to swap out a piston seal, are these the right numbers for a 1.75 bore and 1.358 groove dia?

Question by: Phil W on Jan 11, 2026, 6:35 PM

The key dimensions on this Style 1400 seal are a 1.75 inch bore and a 1.358 inch groove diameter, with a matching piston diameter callout of 1.747 inch. It is built as a 15% glass-filled PTFE seal with a rubber energizer, and the listed tolerances are ±0.002 inch on bore and ±0.001 inch on piston diameter.

Answer by: Customer Support on Jan 13, 2026, 6:29 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