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Style 1400 Glass-Filled PTFE Piston Seal, 2.75 Inch Bore Diameter, 2.36 Inch Groove Diameter, Inch Groove Width

Bore 2.75	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 2.36	Groove Width Tolerance (in) ±0.002	Piston Dia. F 2.75	Piston Dia. Tolerance (in) ±0.001	Seal Height Tolerance (in) ±0.010	Supplier Part Number PS1400-44	Alternate Part Numbers Alternate Part Number C1DH49, Alternate Part Number MI-01035196, Alternate Part Number MINO-00407X30020	Product Weight 0.02 lbs

Product Questions & Answers 1

Product Questions & Answers

Got a cylinder with a 2.75 bore that needs a new piston seal, will this one fit right without a bunch of modification?

Question by: Rod P on Sep 16, 2025, 11:49 AM

For a 2.75-inch bore, this is the correct size. The piston diameter comes in at 2.746 inches with a tolerance of plus or minus 0.001 inch, and the groove diameter is 2.358 inches with a plus or minus 0.002 inch tolerance on the groove width. Those tight tolerances mean it should drop into a properly machined groove without any rework needed. As long as your cylinder was cut to those dimensions, you're looking at a solid fit.

Answer by: Customer Support on Sep 18, 2025, 11:43 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