Home - Products-Shrink chuck BT30 BT40 BT50 Heat expansion holder 04 06 08 10 12

Shrink chuck BT30 BT40 BT50 Heat expansion holder 04 06 08 10 12

BT Shrink Fit Tool Holder

This BT shrink fit tool holder is a high-precision clamping solution for CNC machining centers, designed to deliver excellent concentricity, rigid gripping and high-speed stability for solid carbide cutting tools. It is widely suitable for milling, drilling, reaming and fine finishing operations in precision metal cutting.

Key Performance Features

1. High Precision Clamping

Shrink fit technology provides uniform 360° clamping force around the tool shank, ensuring excellent concentricity and minimal runout for high-precision machining.

2. Strong Gripping Force

The thermal expansion and contraction principle creates a tight, slip-free connection between the holder and the cutting tool, making it suitable for heavy cutting, high-speed milling and difficult-to-machine materials.

3. High Speed Stability

Precision-balanced structure helps reduce vibration during high-speed rotation, improving surface finish, extending tool life and lowering machining noise.

4. Durable Alloy Steel Construction

Made of high-quality alloy steel and precision ground, the holder offers high rigidity, wear resistance and long-term reliability under continuous workshop use.

5. Clean Chip Evacuation

Smooth body design reduces chip accumulation around the clamping area, helping maintain consistent clamping accuracy during long production runs.

Applications

Ideal for mold machining, aerospace components, automotive parts, general machinery and precision fixture manufacturing. Suitable for processing steel, stainless steel, alloy steel, aluminum and copper materials.

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Shrink chuck BT30 BT40 BT50 Heat expansion holder 04 06 08 10 12

Model	L	L1	d1	d2	d3
BBT/BT30-SF03-60	60	9	3	10
BBT/BT30-SF03-80	80	9	3	10	-
BBT/BT30-SF04-60	60	12	4	10	-
BBT/BT30-SF04-80	80	12	4	10	-
BBT/BT30-SF05-60	60	15	5	10	-
BBT/BT30-SF05-80	80	15	5	10	-
BBT/BT30-SF06-60	60	36	6	23	-
BBT/BT30-SF06-80	80	36	6	21	27
BBT/BT30-SF08-60	60	36	8	23	-
BBT/BT30-SF08-80	80	36	8	21	27
BBT/BT30-SF10-60	60	42	10	27	-
BBT/BT30-SF10-80	80	42	10	24	32
BBT/BT30-SF12-60	60	47	12	27	-
BBT/BT30-SF12-80	80	47	12	24	32
BBT/BT30-SF14-65	65	47	14	30	-
BBT/BT30-SF14-80	80	47	14	27	34
BBT/BT30-SF16-65	65	50	16	30	-
BBT/BT30-SF16-80	80	50	16	27	34
BBT/BT30-SF18-70	70	50	18	35.5	40.5
BBT/BT30-SF18-90	90	50	18	33	40.5
BBT/BT30-SF20-70	70	52	20	35.5	40.5
BBT/BT30-SF20-90	90	52	20	33	42
BBT/BT40-SF03-90	90	9	3	10	一
BBT/BT40-SF03-120	120	9	3	10	一
BBT/BT40-SF03-130	130	9	3	10	一
BBT/BT40-SF04-90	90	12	4	10	一
BBT/BT40-SF04-120	120	12	4	10	一
BBT/BT40-SF04-130	130	12	4	10	一
BBT/BT40-SF05-90	90	15	5	10	一
BBT/BT40-SF05-120	120	15	5	10	一
BBT/BT40-SF05-130	130	15	5	10	一
BBT/BT40-SF06-90	90	36	6	21	27
BBT/BT40-SF06-120	120	36	6	21	27
BBT/BT40-SF06-130	130	36	6	21	27
BBT/BT40-SF06-160	160	36	6	21	27
BBT/BT40-SF06-200	200	36	6	21	27
BBT/BT40-SF08-90	90	36	8	21	27
BBT/BT40-SF08-120	120	36	8	21	27
BBT/BT40-SF08-130	130	36	8	21	27
BBT/BT40-SF08-160	160	36	8	21	27
BBT/BT40-SF08-200	200	36	8	21	27
BBT/BT40-SF10-90	90	42	10	24	32
BBT/BT40-SF10-120	120	42	10	24	32
BBT/BT40-SF10-130	130	42	10	24	32

Bestellnummer. BT×ER-L1	D	D1	Bestellnummer.	D	D1
			BT×ER-L1
BT30×ER16-70	28	31.75	BT45×ER32-70	50	57.15
BT30×ER20-70	34	31.75	BT45×ER32-100	50	57.15
BT30×ER25-70	42	31.75	BT45×ER32-120	50	57.15
BT30×ER32-70	50	31.75	BT45×ER40-80	63	57.15
BT30×ER40-80	63	31.75	BT45×ER40-100	63	57.15
BT40×ER16-70	28	44.45	BT45×ER40-120	63	57.15
BT40×ER20-70	34	44.45	BT50×ER16-70	28	69.85
BT40×ER20-100	34	44.45	BT50×ER16-90	28	69.85
BT40×ER20-150	34	44.45	BT50×ER16-135	28	69.85
BT40×ER25-60	42	44.45	BT50×ER20-70	34	69.85
BT40×ER25-70	42	44.45	BT50×ER20-90	34	69.85
BT40×ER25-90	42	44.45	BT50×ER20-135	34	69.85
BT40×ER25-100	42	44.45	BT50×ER20-150	34	69.85
BT40×ER25-150	42	44.45	BT50×ER20-165	34	69.85
BT40×ER32-70	50	44.45	BT50×ER25-70	42	69.85
BT40×ER32-100	50	44.45	BT50×ER25-135	42	69.85
BT40×ER32-150	50	44.45	BT50×ER25-165	42	69.85
BT40×ER40-70	63	44.45	BT50×ER32-70	50	69.85
BT40×ER40-80	63	44.45	BT50×ER32-80	50	69.85
BT40×ER40-120	63	44.45	BT50×ER32-100	50	69.85
BT40×ER40-150	63	44.45	BT50×ER32-102	50	69.85
BT45×ER16-70	28	57.15	BT50×ER40-80	63	69.85
BT45×ER20-70	34	57.15	BT50×ER40-100	63	69.85
BT45×ER20-100	34	57.15	BT50×ER40-120	63	69.85
BT45×ER25-70	42	57.15	BT50×ER40-135	63	69.85
BT45×ER25-90	42	57.15	BT50×ER50-90	78	69.85
BT45×ER25-100	42	57.15	BT50×ER50-120	78	69.85

Standard BT taper ER collet chuck, high concentricity, strong clamping force. Heat-treated alloy steel, stable for high-speed CNC milling. BT30/BT40/BT50 available, match all ER spring collets.

Advantages

Universal ER clamping system, wide clamping range
Low runout, smooth cutting, fine workpiece surface
Hardened & anti-rust treatment, long service life
Easy tool installation & replacement
High rigidity, less vibration during machining

Applications

CNC machining center, mold processing, auto hardware, engraving, metal precision cutting

FAQ

Q1: What the Material of the Tool holder?

A1: 20CrMnTi

Q2: What is the monthly production volume of the collet?

A2: 50,000 - 10,000 pieces

Q3: What hardness and accuracy?

A3: Accuracy: 0.003mm TIR for selection.

Q4: Do you support OEM & custom service?

A4: Yes. We support OEM, custom non‑standard size, laser logo, special package. Samples are available.

Q5: How can I get quotation?

A5: Send us your required model, quantity and special requirements for quotation.

Q6: What is your quality control process?

A6: Strictly controlled on heat treatment, precision grinding. Each piece inspected with testing equipment, inspection report can be provided upon request.

Q7: MOQ & lead‑time?

A7: Standard items: 10pcs , 3‑7 working days. Custom/OEM: MOQ 50pcs, 15‑25 working days.

Q8: Warranty terms?

A8: Manufacturing defects support replacement within 6 months. Damage from crash, misuse or normal wear is not covered.

Catalog is available for download.

https://www.httools.com/data/upload/main/20260730/6a6ab0277d331.pdf

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