Indexable U Drll Bits 4D with WCMT Insert

Our 4D indexable U drill delivers reliable performance at 4× diameter depths with WCMT inserts. Specialized flute design prevents chip packing in deep-hole aluminum and non-ferrous applications, while maintaining dimensional accuracy.

Code No	Size							Insert	Clamp Screw	Wrench
	φD	L	L1	L2	L3	M	φd
SD14-4D-C25	14	135	58	79	56	G 1/8	25	WCMX030208	M2.5*5	T8
SD14.5-4D-C25	14.5	137	60	81	56	G 1/8	25	WCMX 03 02 08	M2.5	T8
SD15-4D-C25	15	137	62	81	56
SD15.5-4D-C25	15.5	139	64	83	56
SD16-4D-C25	16	141	66	85	56
SD16.5-4D-C25	16.5	143	68	87	56
SD17-4D-C25	17	145	70	89	56
SD17.5-4D-C25	17.5	147	72	91	56
SD18-4D-C25	18	149	74	93	56
SD18.5-4D-C25	18.5	151	76	95	56
SD19-4D-C25	19	151	78	95	56
SD19.5-4D-C25	19.5	153	80	97	56
SD20-4D-C25	20	155.5	82	99.5	56	G 1/8	25	WCMX 04 02 08	M2.5*6	T8
SD20.5-4D-C25	20.5	158	84	102	56
SD21-4D-C25	21	160	86	104	56
SD21.5-4D-C25	21.5	162	88	106	56
SD22-4D-C25	22	164	90	108	56
SD22.5-4D-C25	22.5	166	92	110	56
SD23-4D-C25	23	168	94	112	56
SD23.5-4D-C25	23.5	170	96	114	56
SD24-4D-C25	24	172	98	116	56	G 1/8	25	WCMT 05 03 08	M3.0*8	T8
SD24.5-4D-C25	24.5	174	100	118	56
SD25-4D-C25	25	177	102	121	56
SD25-4D-C32	25	186	102	126	60	G 1/4	32
SD25.5-4D-C32	25.5	188	104	128	60
SD26-4D-C32	26	190	106	130	60
SD26.5-4D-C32	26.5	192	108	132	60
SD27-4D-C32	27	194	110	134	60
SD27.5-4D-C32	27.5	196	112	136	60
SD28-4D-C32	28	198	114	138	60
SD28.5-4D-C32	28.5	200	116	140	60
SD29-4D-C32	29	202	118	142	60
SD29.5-4D-C32	29.5	204	120	144	60
SD30-4D-C32	30	206	122	146	60
SD30.5-4D-C32	30.5	207	124	147	60
SD31-4D-C32	31	209	126	149	60	G 1/4	32	WCMT 06 T3 08	M3.5*10	T15
SD31.5-4D-C32	31.5	210	128	150	60
SD32-4D-C32	32	213	130	153	60
SD32.5-4D-C32	32.5	214	132	154	60
SD33-4D-C32	33	217	134	157	60
SD33.5-4D-C32	33.5	218	136	158	60
SD34-4D-C32	34	220	138	160	60	G 1/4	32	WCMT 06 T3 08	M3.5*10	T15
SD34.5-4D-C32	34.5	221	140	161	60
SD35-4D-C32	35	225	142	165	60
SD35.5-4D-C32	35.5	226	144	166	60
SD36-4D-C32	36	229	146	169	60
SD36.5-4D-C32	36.5	231	148	171	60
SD37-4D-C32	37	233	150	173	60
SD37.5-4D-C32	37.5	236	152	176	60
SD38-4D-C32	38	234.5	154	174.5	60
SD38.5-4D-C32	38.5	236.5	156	176.5	60
SD39-4D-C32	39	240	158	180	60
SD39.5-4D-C32	39.5	239	160	179	60
SD40-4D-C32	40	240	162	180	60
SD40.5-4D-C32	40.5	241	164	181	60
SD41-4D-C32	41	246	166	186	60
SD41.5-4D-C32	41.5	245	168	185	60
SD42-4D-C40	42	265	170	195	60	G 1/4	40	WCMT Previous Product Indexable U Drll Bits 3D with WCMT Insert Next Product Indexable U Drll Bits 5D with WCMT Insert Related Products Explore more cutting tools from the same series or for similar applications Indexable U Drll Bits 4D with SPGT/SPMG Insert Insert Type: SPGT/SPMG Series Holder Diameter(4xD): 10-60mm Suitable for: Stainless steel / mold steel / cast iron View Details Indexable U Drll Bits 2D with SPGT/SPMG Insert Insert Type: SPGT/SPMG Series Holder Diameter(2xD): 10-60mm Suitable for: Stainless steel / mold steel / cast iron View Details Indexable U Drll Bits 3D with SPGT/SPMG Insert Insert Type: SPGT/SPMG Series Holder Diameter(3xD): 10-60mm Suitable for: Stainless steel / mold steel / cast iron View Details Related Articles Technical insights and buying guides to help you choose the right cutting tools  What is an indexable drill bit?  What is the difference between a U drill and a SC drill?  What is an advantage of an indexable insert drill?  What is a drill index used for?  What are U drills?  Top Benefits of Using Indexable Insert Drill Bits in CNC Machining Request a Quote / Technical Inquiry Tell us your material, Product size and quantity. Our engineer will reply within 24 hours. Your Name * Email Address * Inquiry Details * Submit Inquiry Success Thank you, We Will Call You Back Soon! OK Error Submission failed, please try again. OK Ready to Improve Your Machining Performance? Contact our experts today for a free quote or technical consultation. Get a Free Quote