American Heller Corporation the Deep Hole Drilling Specialists

Brazed Disposable Drill Head (ETU)

American Heller's ETU Drills are used for Solid Drilling operations. Solid Drilling is a deep hole drilling process used when only one operation is desired to obtain the required bore diameter. Solid Drilling tools remove all the material from the bore in just one pass. Additionally due to the quality of the bore finish the majority of operations require no additional machining to 'clean up' the bore. ETU drills can be re-tipped when the carbide inserts and pads are worn or chipped.

Consider these unique advantages of American Heller's Brazed Disposable Drill Heads (ETU)

Tools sizes between .724-2.559" are stocked for quick delivery
Tools produced to an accuracy of ą.0005" on diameter resulting in closer tolerance holes
Tools can be re-tipped when carbide inserts and pads are worn or chipped
Various grades available for drilling different materials
4 premium grades of coating for optimum tool life

Note:
Hole tolerances, concentricity, surface finish and runout will be affected by a number of factors including machine condition, alignment, drilling bar straightness, bushing size, etc.

General Information

American Heller's ETU drills are for use with the DTS (double tube) drilling system. For more information on the DTS drilling system please refer to our Drilling Information Page . Additionally they have an external thread and chips are ID exhausted through the drilling bar/drill tube. The following table shows the different tool ranges and the standard drilling bar/drill tube that they are used with.

PART NO.	DIA (INCH)	BAR/TUBE	PART NO.	DIA (INCH)	BAR/TUBE
ETU-001	0.724 - 0.756	800-DTS	ETU-083	1.513 - 1.559	808-DTS
ETU-002	0.757 - 0.786	800-DTS	ETU-091	1.560 - 1.598	809-DTS
ETU-011	0.787 - 0.822	801-DTS	ETU-092	1.599 - 1.646	809-DTS
ETU-012	0.823 - 0.858	801-DTS	ETU-093	1.647 - 1.693	809-DTS
ETU-021	0.859 - 0.902	802-DTS	ETU-101	1.694 - 1.744	810-DTS
ETU-022	0.903 - 0.949	802-DTS	ETU-102	1.745 - 1.795	810-DTS
ETU-031	0.950 - 0.992	803-DTS	ETU-103	1.796 - 1.850	810-DTS
ETU-032	0.993 - 1.039	803-DTS	ETU-111	1.851 - 1.909	811-DTS
ETU-041	1.040 - 1.083	804-DTS	ETU-112	1.910 - 1.972	811-DTS
ETU-042	1.084 - 1.130	804-DTS	ETU-113	1.973 - 2.035	811-DTS
ETU-051	1.131 - 1.173	804-DTS	ETU-121	2.036 - 2.095	812-DTS
ETU-052	1.174 - 1.220	804-DTS	ETU-122	2.096 - 2.154	812-DTS
ETU-061	1.221 - 1.264	804-DTS	ETU-123	2.155 - 2.213	812-DTS
ETU-062	1.265 - 1.311	804-DTS	ETU-131	2.214 - 2.299	813-DTS
ETU-071	1.312 - 1.370	805-DTS	ETU-132	2.300 - 2.386	813-DTS
ETU-072	1.371 - 1.425	805-DTS	ETU-133	2.387 - 2.472	813-DTS
ETU-081	1.426 - 1.469	808-DTS	ETU-134	2.473 - 2.559	813-DTS
ETU-082	1.470 - 1.512	808-DTS

American Heller's ETU Drill Heads are available in a variety of different grades for drilling different materials. The table below shows the available grades and the part material that they should be used with. The UP and UX grades are the default grades for American Heller's ETU Drills. A special TIN coating is available upon request.

GRADE	ISO	PART MATERIAL
*UX	P20	STEEL
	M20-P30	ALLOY STEEL
	M30	STAINLESS
*UP	P15	STEEL
	M15-P25	ALLOY STEEL
	M20	STAINLESS
PF	K10	CAST IRON
	K20	ALUMINUM
		STAINLESS
UZ	P40	ALLOY STEEL