UCI-UN Internal Spiral Thread Mill

Commodity Brief

Recommended for UN internal thread milling in carbon, alloy and prehardened steels, with coarse-, fine- and extra-fine-pitch options.
A pitch-specific, multi-row cutting section machines the internal thread by helical interpolation. The TiSiN-coated design has a 15° helix, with three or four flutes depending on size.
⌀4.8–20 mm; 24 sizes.

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Product Introduction

Carbon steel	Alloy steel	Pre-hardened steel	Stainless steel	Aluminum alloy	Copper	Resin	Graphite	Hard and brittle materials	Heat-resistant alloys	Workpiece Hardness
Carbon steel	Alloy steel	Pre-hardened steel	Stainless steel	Aluminum alloy	Copper	Resin	Graphite	Hard and brittle materials	Heat-resistant alloys	50HRC	55HRC	62HRC
◎	◎	◎	○	○	○	○					◎

Code No. UCI	(M) Coarse	(M1) Fine	(M2) Extra Fine Unef	(P) Pitch	(D) Dia.	(h) Length of Cut	(t) No. of Flutes	(Y) Shank Taper Angle	(d) Shank Dia.	(L) Overall Length
3206	-	-	5/16"	32	6	15	3	-	6	60
3208	-	-	3/8"	32	8	20	3	-	8	60
2806	-	1/4"	-	28	5.1	15	3	15	6	60
2808	-	-	7/16"、1/2"	28	8	20	3	-	8	60
2406	-	5/16"	-	24	6	15	3	-	6	60
2408	-	3/8"	-	24	8	20	3	-	8	60
2412	-	9/16"、5/8"	-	24	12	30	4	-	12	75
2006	1/4"	-	-	20	4.8	12	3	15	6	60
2008	-	7/16"	-	20	8	20	3	-	8	60
2010	-	1/2"	-	20	10	25	4	-	10	75
2012	-	-	3/4"、1"	20	12	30	4	-	12	75
1806	5/16"	-	-	18	6	15	3	-	6	60
1810	-	9/16"、5/8"	-	18	10	25	4	-	10	75
1608	3/8"	-	-	16	7.5	18.2	3	15	8	60
1612	-	3/4"	-	16	12	30	4	-	12	75
1408	7/16"	-	-	14	8	20	3	-	8	60
1412	-	7/8"	-	14	12	30	4	-	12	75
1310	1/2"	-	-	13	10	25	4	-	10	75
1212	9/16"	-	-	12	11.5	30	4	15	12	75
1216	-	1"	-	12	16	40	4	-	16	100
1112	5/8"	-	-	11	12	30	4	-	12	75
1016	3/4"	-	-	10	16	40	4	-	16	100
0916	7/8"	-	-	9	16	40	4	-	16	100
0820	1"	-	-	8	20	50	4	-	20	100