291 Series End Mills

Geometry Specifications:

Axial: Positive
Radial: Negative

291 Series have a chip control insert for optimum tool performance with a large offering of insert corner radii. The back taper design is to allow reach in tight corners, with extended length tooling for long reach applications. The 291 series tooling accepts the same insert as in the 290 tooling.

**291 End Mill - Dimensional Specifications**
Product Number	D	S	C	L	A	Insert	Teeth	Wrench
291E0100BCP3-W100R	1.00	1.00	3.00	5.28	7°	CPEH-32.63-__4W	2	1557-TX15
291E0100CCP3-W100R	1.00	1.00	4.00	6.28	7°	CPEH-32.63-__4W	2	1557-TX15
291E0100DCP3-W125R	1.00	1.25	5.00	7.28	7°	CPEH-32.63-__4W	2	1557-TX15
291E0100ECP3-W125R	1.00	1.25	6.00	8.28	7°	CPEH-32.63-__4W	2	1557-TX15

Milling Cutter Nomenclature

* NOTE: When using a corner radius other than the 12 (CPEH-32.63-12-4W) that the cutter was designed over, use the chart below to determine the correct dimensional specifications for your cutter.

**291 Face Mill and End Mill - Insert Change Specifications**
Product Series	Cutting Point	Corner Radius	D+	L+	H+	Insert Number
291	2	.031	.046	.011	.011	CPEH-32.63-2-4W
291	4	.062	.037	.009	.009	CPEH-32.63-4-4W
291	6	.094	.027	.007	.007	CPEH-32.63-6-4W
291	8	.125	.018	.005	.005	CPEH-32.63-8-4W
291	12	.188	.000	.000	.000	CPEH-32.63-12-4W

**Parts**
Insert IC & Thickness	Insert Number	Screw	Wrench

.375 x .188	CPEH-32.63-2-4W	3605-0001-0033	1557-TX15
	CPEH-32.63-4-4W
	CPEH-32.63-6-4W
	CPEH-32.63-8-4W
	CPEH-32.63-12-4W

Insert Nomenclature

**Starting Machining Parameters**
Material	SFPM	FPT	Primary	Secondary
Tool Steel, D2, P20	300-700	.003-.010	CPEH-32.63-__-4W GR 606jRm	CPEH-32.63-__-4W GR LTC-14