BT-ER Collet Chuck Holder

BT ER collet chuck holder in BT30, BT40 and BT50 shanks, seven ER sizes from ER11M to ER50, ground to ≤0.005mm runout. Gage lengths run 60mm to 600mm — BT30 stops at 150mm, while the long BT50 ER32 and ER40 bodies reach 600mm without an extension. The body is 20CrMnTi alloy steel, vacuum quenched to HRC 56-58 and ground to the MAS 403 BT tool holder taper, balanced for high-speed work. Any standard ER collet fits. The nut ships with the holder; collets, wrench and pull stud are ordered separately.

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BT-ER Collet Chuck Holder Specifications 98 SKUs available

SKU	Price	Total	L (mm)	L1 (mm)	L2 (mm)	L3 (mm)	D (mm)	d1 (mm)	d2 (mm)	d3 (mm)	Range (mm)	FIG
BT30-ER11M-60	$15	$0	108.4	60	38	22	46	16	11	16	1-7	Fig.1
BT30-ER11M-100	$16	$0	148.4	100	78	22	46	16	11	16	1-7	Fig.1
BT30-ER16-60	$15	$0	108.4	60	38	22	46	28	16	28	1-10	Fig.1
BT30-ER16-100	$16	$0	148.4	100	78	22	46	28	16	28	1-10	Fig.1
BT30-ER20-60	$15	$0	108.4	60	38	22	46	34	20	34	1-13	Fig.1
BT30-ER20-100	$16	$0	148.4	100	78	22	46	34	20	34	1-13	Fig.1
BT30-ER20-150	$17	$0	198.4	150	128	22	46	34	20	34	1-13	Fig.1
BT30-ER25-60	$15	$0	108.4	60	38	22	46	42	25	42	1-16	Fig.1
BT30-ER25-100	$16	$0	148.4	100	78	22	46	42	25	42	1-16	Fig.1
BT30-ER25-150	$17	$0	198.4	150	128	22	46	42	25	42	1-16	Fig.1
BT30-ER32-60	$15	$0	108.4	60	38	22	46	50	32	50	2-20	Fig.1
BT30-ER32-100	$16	$0	148.4	100	78	22	46	50	32	50	2-20	Fig.1
BT30-ER32-150	$17	$0	198.4	150	128	22	46	50	32	50	2-20	Fig.1
BT30-ER40-80	$16	$0	128.4	80	58	22	46	63	40	63	2-26	Fig.1
BT40-ER11M-70	$20	$0	135.4	70	43	27	63	16	11	16	1-7	Fig.1
BT40-ER11M-100	$20	$0	165.4	100	73	27	63	16	11	16	1-7	Fig.1
BT40-ER11M-150	$31	$0	215.4	150	123	27	63	16	11	16	1-7	Fig.1
BT40-ER16-70	$20	$0	135.4	70	43	27	63	28	16	28	1-10	Fig.1
BT40-ER16-100	$20	$0	165.4	100	73	27	63	28	16	28	1-10	Fig.1
BT40-ER16-150	$31	$0	215.4	150	123	27	63	28	16	28	1-10	Fig.1
BT40-ER16-200	$43	$0	265.4	200	173	27	63	28	16	28	1-10	Fig.1
BT40-ER16-250	$54	$0	315.4	250	223	27	63	28	16	28	1-10	Fig.1
BT40-ER16-300	$65	$0	365.4	300	273	27	63	28	16	28	1-10	Fig.1
BT40-ER20-70	$20	$0	135.4	70	43	27	63	34	20	34	1-13	Fig.1
BT40-ER20-100	$20	$0	165.4	100	73	27	63	34	20	34	1-13	Fig.1
BT40-ER20-150	$31	$0	215.4	150	123	27	63	34	20	34	1-13	Fig.1
BT40-ER20-200	$43	$0	265.4	200	173	27	63	34	20	34	1-13	Fig.1
BT40-ER20-250	$57	$0	315.4	250	223	27	63	34	20	34	1-13	Fig.1
BT40-ER20-300	$71	$0	365.4	300	273	27	63	34	20	34	1-13	Fig.1
BT40-ER25-70	$20	$0	135.4	70	43	27	63	42	25	42	1-16	Fig.1
BT40-ER25-100	$20	$0	165.4	100	73	27	63	42	25	42	1-16	Fig.1
BT40-ER25-150	$31	$0	215.4	150	123	27	63	42	25	42	1-16	Fig.1
BT40-ER25-200	$43	$0	265.4	200	173	27	63	42	25	42	1-16	Fig.1
BT40-ER25-250	$57	$0	315.4	250	223	27	63	42	25	42	1-16	Fig.1
BT40-ER25-300	$71	$0	365.4	300	273	27	63	42	25	42	1-16	Fig.1
BT40-ER32-70	$20	$0	135.4	70	43	27	63	50	32	50	2-20	Fig.1
BT40-ER32-100	$20	$0	165.4	100	73	27	63	50	32	50	2-20	Fig.1
BT40-ER32-150	$31	$0	215.4	150	123	27	63	50	32	50	2-20	Fig.1
BT40-ER32-200	$43	$0	265.4	200	173	27	63	50	32	50	2-20	Fig.1
BT40-ER32-250	$57	$0	315.4	250	223	27	63	50	32	50	2-20	Fig.1
BT40-ER32-300	$71	$0	365.4	300	273	27	63	50	32	50	2-20	Fig.1
BT40-ER40-80	$22	$0	145.4	80	53	27	63	63	40	63	2-26	Fig.1
BT40-ER40-100	$23	$0	165.4	100	73	27	63	63	40	63	2-26	Fig.1
BT40-ER40-150	$33	$0	215.4	150	123	27	63	63	40	63	2-26	Fig.1
BT40-ER40-200	$43	$0	265.4	200	173	27	63	63	40	63	2-26	Fig.1
BT40-ER40-250	$57	$0	315.4	250	223	27	63	63	40	63	2-26	Fig.1
BT40-ER40-300	$71	$0	365.4	300	273	27	63	63	40	63	2-26	Fig.1
BT40-ER50-100	$43	$0	165.4	100	43	27	63	78	50	78	6-34	Fig.1
BT50-ER16-80	$43	$0	171.8	80	42	38	100	28	16	28	1-10	Fig.2
BT50-ER16-100	$43	$0	201.8	100	62	38	100	28	16	28	1-10	Fig.2
BT50-ER16-150	$54	$0	251.8	150	112	38	100	28	16	28	1-10	Fig.2
BT50-ER16-200	$68	$0	301.8	200	162	38	100	28	16	28	1-10	Fig.2
BT50-ER16-250	$96	$0	351.8	250	212	38	100	28	16	31	1-10	Fig.3
BT50-ER16-300	$124	$0	401.8	300	262	38	100	28	16	33	1-10	Fig.3
BT50-ER16-350	$153	$0	451.8	350	312	38	100	28	16	35	1-10	Fig.3
BT50-ER20-80	$43	$0	181.8	80	42	38	100	34	20	34	1-13	Fig.2
BT50-ER20-100	$43	$0	201.8	100	62	38	100	34	20	34	1-13	Fig.2
BT50-ER20-150	$54	$0	251.8	150	112	38	100	34	20	34	1-13	Fig.2
BT50-ER20-200	$68	$0	301.8	200	162	38	100	34	20	34	1-13	Fig.2
BT50-ER20-250	$96	$0	351.8	250	212	38	100	34	20	37	1-13	Fig.3
BT50-ER20-300	$113	$0	401.8	300	262	38	100	34	20	39	1-13	Fig.3
BT50-ER20-350	$124	$0	451.8	350	312	38	100	34	20	41	1-13	Fig.3
BT50-ER20-400	$153	$0	501.8	400	362	38	100	34	20	43	1-13	Fig.3
BT50-ER25-80	$43	$0	181.8	80	42	38	100	42	25	42	1-16	Fig.2
BT50-ER25-100	$43	$0	201.8	100	62	38	100	42	25	42	1-16	Fig.2
BT50-ER25-150	$54	$0	251.8	150	112	38	100	42	25	42	1-16	Fig.2
BT50-ER25-200	$68	$0	301.8	200	162	38	100	42	25	42	1-16	Fig.2
BT50-ER25-250	$96	$0	351.8	250	212	38	100	42	25	45	1-16	Fig.3
BT50-ER25-300	$113	$0	401.8	300	262	38	100	42	25	47	1-16	Fig.3
BT50-ER25-350	$124	$0	451.8	350	312	38	100	42	25	49	1-16	Fig.3
BT50-ER25-400	$153	$0	501.8	400	362	38	100	42	25	51	1-16	Fig.3
BT50-ER32-80	$43	$0	181.8	80	42	38	100	50	32	50	2-20	Fig.2
BT50-ER32-100	$43	$0	201.8	100	62	38	100	50	32	50	2-20	Fig.2
BT50-ER32-150	$54	$0	251.8	150	112	38	100	50	32	50	2-20	Fig.2
BT50-ER32-200	$68	$0	301.8	200	162	38	100	50	32	50	2-20	Fig.2
BT50-ER32-250	$96	$0	351.8	250	212	38	100	50	32	50	2-20	Fig.2
BT50-ER32-300	$113	$0	401.8	300	262	38	100	50	32	53	2-20	Fig.3
BT50-ER32-350	$124	$0	451.8	350	312	38	100	50	32	54	2-20	Fig.3
BT50-ER32-400	$153	$0	501.8	400	362	38	100	50	32	56	2-20	Fig.3
BT50-ER32-450	$181	$0	551.8	450	412	38	100	50	32	58	2-20	Fig.3
BT50-ER32-500	$203	$0	601.8	500	462	38	100	50	32	60	2-20	Fig.3
BT50-ER32-550	$220	$0	651.8	550	512	38	100	50	32	65	2-20	Fig.3
BT50-ER32-600	$243	$0	701.8	600	562	38	100	50	32	68	2-20	Fig.3
BT50-ER40-80	$43	$0	186.8	80	42	38	100	63	40	63	2-26	Fig.2
BT50-ER40-100	$44	$0	201.8	100	62	38	100	63	40	63	2-26	Fig.2
BT50-ER40-150	$54	$0	251.8	150	112	38	100	63	40	63	2-26	Fig.2
BT50-ER40-200	$71	$0	301.8	200	162	38	100	63	40	63	2-26	Fig.2
BT50-ER40-250	$99	$0	351.8	250	212	38	100	63	40	63	2-26	Fig.2
BT50-ER40-300	$116	$0	401.8	300	262	38	100	63	40	66	2-26	Fig.3
BT50-ER40-350	$127	$0	451.8	350	312	38	100	63	40	67	2-26	Fig.3
BT50-ER40-400	$153	$0	501.8	400	362	38	100	63	40	70	2-26	Fig.3
BT50-ER40-450	$181	$0	551.8	450	412	38	100	63	40	72	2-26	Fig.3
BT50-ER40-500	$203	$0	601.8	500	462	38	100	63	40	73	2-26	Fig.3
BT50-ER40-550	$220	$0	651.8	550	512	38	100	63	40	75	2-26	Fig.3
BT50-ER40-600	$243	$0	701.8	600	562	38	100	63	40	78	2-26	Fig.3
BT50-ER50-100	$62	$0	201.8	100	62	38	100	78	50	78	6-34	Fig.2
BT50-ER50-150	$74	$0	251.8	150	112	38	100	78	50	78	6-34	Fig.2
BT50-ER50-200	$102	$0	301.8	200	162	38	100	78	50	78	6-34	Fig.2

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BT-ER Collet Chuck Holder Features

Shanks: BT30, BT40 and BT50 to the MAS 403 taper

Seven collet sizes, ER11M to ER50, clamping 1 to 34mm

Gage lengths 60mm to 600mm; BT30 to 150mm, BT40 to 300mm, BT50 to 600mm

Body material: 20CrMnTi alloy steel, vacuum quenched to HRC 56-58

98 shank / collet / length configurations

Clamping accuracy (runout) ≤0.005mm (≤0.0002 in)

Dynamically balanced, for stable running at speed

Takes any standard ER collet — no proprietary tooling

Snap the collet into the nut first, then the tool, then lock into the body

The tool shank must reach past the collet bore’s effective clamping length

Nut included; collets, wrench and pull stud ordered separately

For professional reference

Technical Drawing

Fig.1

Fig.2

Fig.3

BT-ER Collet Chuck Holder

BT-ER Collet Chuck Holder Specifications 98 SKUs available

BT-ER Collet Chuck Holder Features

Technical Drawing

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