Library › Hardware › Stirling & thermoacoustic ·

3 in end caps with a bored 608 bearing boss: shaft-seal version and blind version with three 1/4 NPT bosses

Name: 3 in end caps with a bored 608 bearing boss: shaft-seal version and blind version with three 1/4 NPT bosses dimension sheet
Creator: Xem Studio
License: https://creativecommons.org/licenses/by/4.0/

How do I carry a crankshaft in a sealed tri-clamp crankcase? · Hardware · basis: ISO 2852 3 in face (Ø91 flange, Ø83.5 groove); 608 and ISO 6194-1 8 × 22 × 7 sizes from their standards; 1/4 NPT per ASME B1.20.1

Long Earth Society build part. The crankcase caps of my charged beta. The engines

Exact dimensions. Every file is drawn at true size with no printing tolerance. The holes and pins that meet another part are listed below under Mating features, with the fit each joint needs; open those by your printer's or process's clearance before making the part. Mating features

sizes: 2 in table

Notes

Two 3 in end caps close the run of a 3 in tee (the crankcase) and carry the crankshaft in a 608 each. On the output side an 8 × 22 × 7 rotary shaft seal sits outboard of the bearing against the outer shoulder: the crankcase pressure pushes it onto the shoulder.
The blind cap carries the crankcase's three 1/4 NPT ports: fill valve, gauge and relief valve.
A plain lip seal is made for a small pressure difference; for a charged crankcase use a type its maker rates above the relief setting.

Sizes

part	bore	ports
bearing-cap-3in-608-seal	Ø22 to 35: 608 + seal, Ø12 shoulder	—
bearing-cap-3in-608-3x-npt14	Ø22 to 28: 608	3 × 1/4 NPT on r 27

Mating features

Drawn at the exact size. Open press, slide, run and socket features by your process's clearance; leave designed gaps and clamp fits as drawn.

feature	exact	mates with	fit	files
face	ISO 2852 3 in (Ø91 flange, Ø83.5 groove)	Type B gasket, 3 in clamp	clamp	all
bearing bore	Ø22, 608 at z 21–28	608 bearing OD	press	all
seal bore	Ø22, z 28–35, outer shoulder Ø12	8 × 22 × 7 rotary shaft seal OD	press	bearing-cap-3in-608-seal*
port bosses	3 × 1/4-18 NPT on r 27, tap drill Ø11.1 × 12	fill valve, gauge, relief valve	designed	bearing-cap-3in-608-3x*

Where the files are

Other publishers' files are linked, not hosted. "verify" = check the license at the link before commercial use.

ISO (via iTeh sample)	ISO 2852 clamp liners: face profile and flange / groove diameters	PDF	standard excerpt; dimensions are facts
ASME	BPE Bioprocessing Equipment (clamp fitting dimensions, tube OD and wall)	standard	ASME; dimensions are facts verify
ASME	ASME B1.20.1 Pipe Threads, General Purpose, Inch (NPT): 1/4-18 major Ø13.72, tap drill 7/16 in (11.1), L2 10.2	standard	ASME; dimensions are facts verify
ISO	ISO 6194-1 Rotary shaft lip-type seals: nominal dimensions (8 × 22 × 7 is a listed size)	standard	dimensions are facts verify
Long Earth Society	Engine builds	web, video	LES site

Free files

★ Free files 2 parts. Generated by Xem Studio from the standard; threads are plain cylinders at major diameter. CC BY 4.0. index.json

bearing-cap-3in-608-seal	3 in bearing cap: ISO 2852 3 in face, body Ø76.2 to 14, boss Ø36 to 40, Ø22 bore to z 35 (608 at 21–28, 8 × 22 × 7 shaft seal at 28–35), Ø12 through the outer shoulder	STEP · STL
bearing-cap-3in-608-3x-npt14	3 in bearing cap, blind: Ø22 bore to z 28 (608 at 21–28), three 1/4 NPT bosses on its back on r 27 (fill, gauge, relief)	STEP · STL

Plain text: sheet.txt · JSON: /api/geometry?object=tri-clamp-bearing-cap-3in