What is different about EGT and injector housings?

They combine a thin wall with a sealing or locating feature, and they sit in a hot, vibrating environment. That pushes the design towards 310S or 316 on the exhaust side, towards a machined sealing face after forming, and towards a draw schedule with more stages than the diameter alone would suggest.

Published configurations

22 published configurations in this family. Heights run 7.2-43.2 mm, outer diameters 2.90-16.70 mm, grades used: SUS 305, SUS 310, SUS 316, SUS 430.

Code	Height	OD	ID	Wall	Material
K001	43.2	11.3，14.9	10.3，14	0.5	SUS 430
K005	17.8	12，10.9	11，7.9	0.5	SUS 430
K005-3	17.8	12，10.9	11，7.9	0.5	SUS 430
K006	21.6	13.75，8.8，11.7	11.75，7.1	1.0	SUS 430
K006-2	18.8	13.3，8.8	11.75，7.1	1.0	SUS 430
K007-2	24	7，7.8	6.3，7	0.4	SUS 310
K009	21.5	3，5.2，5.5	2.5，4.7，5	0.25	SUS 310
K010	24	6.06，7.05	5.06，6.05	0.5	SUS 305
K012	19.5	2.9，4.4，6.55	2.4，3.9，6	0.25	SUS 310
K013-2	20.5	2.9，4.4，7	2.4，3.9，6	0.25	SUS 310
K017	29	8.9，13.95	8.1，13.2	0.4	SUS 310
K018	7.2	14.7	14.2	0.4	SUS 310
K019	20.5	3，4.5，6.7	2.5，4，6.16	-	-
K020	13.4	7.9，11.5	6.25	1.0	SUS 310
K022	28	15	14.2	0.4	SUS 316
K022-2	28	12.7，15	8.7，14.2	0.4	SUS 316
K024	20	2.92，5.6，6.5	2.4，5.1，6	0.25	SUS 310
K026	32	10.56，15.5	10.06，15	0.25	SUS 305
K027	32.2	13.9，15.9，16.7	11.9，13.9，14	1.0	SUS 310
K033	34.8	6.5，6.8，8，11	5.5，5.8，7	0.6	SUS 316

Showing the first 20 of 22. The complete list is in the sensor housing catalogue.

Wall and sealing face

The wall is usually thin relative to the diameter, which is exactly where ironing earns its place: the wall is thinned deliberately while both diameters stay under control. The sealing face is then machined so that squareness and surface finish are held independently of the drawn surface.

Vibration and fatigue

Exhaust-side parts see thermal cycling and vibration. Rounded transitions between wall and flange, no sharp internal corners, and a consistent wall all matter more than a marginally tighter general tolerance.

Grade, wall thickness and tolerance are confirmed against the customer drawing. Batch heat treatment, slow wire cutting, passivation, electropolishing, plating, phosphating and coating are placed with qualified external processors and disclosed on the inspection plan. The quality system is ISO 9001:2015 with controls aligned to IATF 16949 requirements.

Related engineering data

Frequently asked questions

How many EGT / injector configurations does Balford publish?

The published catalogue contains 22 EGT / injector configurations, each recorded with height, outer diameter, inner diameter and material per catalogue code.

What sizes are available for EGT / injector parts?

Recorded heights run 7.2-43.2 mm and outer diameters 2.9-16.7. Custom sizes are manufactured to the customer drawing rather than limited to the catalogue.

Which materials are used?

The published configurations use SUS 305, SUS 310, SUS 316, SUS 430. Material, temper and wall thickness are confirmed against the drawing before tooling.

What wall thickness is typical?

Recorded wall thicknesses in this family: 0.25, 0.40, 0.50, 0.60, 1.00 mm.

How do I get a quotation?

Send a 2D drawing or 3D model with the material, annual volume and the tolerances that matter. A DFM review covering draw ratio, forming stages and thinning comes back before tooling, and the quotation separates tooling cost from piece price.

Written by the Balford engineering team, Zhuji, Zhejiang, China. Last updated 21 September 2026.