Mô tả
BT-ERO Oil-Feed ER Collet Holder – Internal Coolant 4MPa, Precision Run-out <0.005mm, ER8-ER40
BT-ERO Oil-Feed ER Collet Holder – ER Collet Type, Internal Coolant 4MPa, 6 Sizes
BT-ERO oil-feed ER collet holder là giải pháp precision cao cho internal coolant operations yêu cầu cả cooling performance và clamping accuracy. Khác với BT-SLO (side lock, run-out 0.01-0.02mm), hệ thống này sử dụng ER collet clamping system (DIN 6499 standard) – precision clamping với run-out <0.005mm at collet nose, kết hợp internal coolant channels áp suất ≤4MPa (40 bar) để deliver coolant trực tiếp vào cutting zone.
Hệ thống bt-ero oil-feed er collet holder bao gồm 6 holder sizes correspond với ER collet standards: ERO8-BT30/40 (ER8, Φ1-5mm), ERO11-BT30/40 (ER11, Φ1-7mm), ERO16-BT30/40 (ER16, Φ1-10mm most popular), ERO20-BT40 (ER20, Φ1-13mm), ERO25-BT40/50 (ER25, Φ2-16mm), ERO32-BT50 (ER32, Φ2-20mm), ERO40-BT50 (ER40, Φ3-26mm). Mỗi holder accept full range of ER collets (ví dụ: ERO20-BT40 accept tất cả ER20 collets từ Φ1-13mm trong 0.5mm increments).
Ứng dụng chính: Precision drilling H7 tolerance, reaming operations (Ra 0.8μm finish), high-speed milling with coolant, small diameter drilling (<Φ10mm), thread milling với internal coolant, aerospace/medical part machining yêu cầu tight tolerances + coolant.
5 Tính Năng Vượt Trội Của BT-ERO Oil-Feed ER Collet Holder
- ER Collet Precision <0.005mm – Superior to Side Lock: Sử dụng ER collet system (DIN 6499) – industrial standard cho precision tool clamping. ER collet run-out specification: <0.005mm at collet nose (2×D projection) → 4× better than side lock holders (0.02mm). ER collet advantages: (1) Concentric clamping – collet compresses 360° around tool shank (vs side lock: single-point contact from set screw → eccentric clamping), (2) Consistent run-out – collet maintains <0.005mm across full clamping range, (3) Surface finish – low run-out → better finish quality (Ra 0.4-0.8μm for reaming vs Ra 1.6-3.2μm side lock). Ideal cho precision operations: reaming H7 holes, finish boring IT7, precision milling ±0.01mm tolerance.
- Internal Coolant 4MPa + ER Precision – Best of Both Worlds: Combines internal coolant delivery (through-spindle coolant 4MPa) với ER collet precision – unique combination không available trong standard holders. Internal coolant channels: coolant flow từ BT taper → holder body → ER collet nut → tool shank → cutting edges. Coolant benefits: (1) 70% tool life increase (same as BT-SLO), (2) Chip evacuation in deep holes (L/D >5:1), (3) Temperature control – prevent thermal expansion (critical cho precision tolerance ±0.01mm), (4) Built-up edge prevention – coolant flush chips immediately. Flow rate: 8-12 L/min, pressure ≤4 MPa. Tham khảo ISO 15641-1 tool holder standards cho coolant specifications.
- 6 ER Sizes Cover Φ1-26mm – Micro to Large Diameter: System: ERO8 (ER8, Φ1-5mm micro drills/end mills), ERO11 (ER11, Φ1-7mm small tools), ERO16 (ER16, Φ1-10mm most popular, cover 80% applications), ERO20 (ER20, Φ1-13mm medium), ERO25 (ER25, Φ2-16mm large milling), ERO32 (ER32, Φ2-20mm heavy-duty), ERO40 (ER40, Φ3-26mm extra-large drilling/boring). 6 sizes cover Φ1-26mm continuous range với ER collet increments 0.5-1mm (ví dụ: ER20 set = 13 collets: Φ1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13mm). 1 holder + 1 ER collet set → handle 13-25 tool diameters.
- ER Collet Quick Change – 5-Minute Changeover: Với ER collet system cho phép quick tool changeover while maintaining precision. Changeover process: (1) Loosen collet nut với spanner wrench (3 turns, 10 seconds), (2) Remove tool + collet (5 seconds), (3) Insert new tool + corresponding size collet (10 seconds), (4) Tighten collet nut to 80-120 Nm torque (20 seconds với torque wrench), (5) Verify run-out với dial indicator (30 seconds optional) → total time: 5 minutes. Compare với shrink-fit holders: 15-20 minutes (heat, cool, measure run-out). ER collet inventory: 1× ERO16 holder + 1× ER16 collet set (20 collets) = $600 → handle Φ1-10mm tools.
- High-Speed Capability 25,000 RPM – Balanced for Precision Milling: Được precision balanced cho high-speed operations up to 25,000 RPM (depend on tool diameter và holder size). Balance grade: G2.5@15000 RPM (better than G6.3 standard holders). High-speed advantages: (1) Aluminum aerospace – Φ6mm carbide end mill @ 22,000 RPM (Vc=415 m/min) with internal coolant → tool life 12 hours, (2) Micro milling – Φ3mm ball nose @ 20,000 RPM → surface finish Ra 0.4μm, (3) Small hole drilling – Φ2mm carbide drill @ 18,000 RPM with coolant → straight holes no wandering (run-out <0.005mm prevents hole drift). Follow Kennametal high-speed milling guide cho speed/feed calculations.
Thông Số Kỹ Thuật BT-ERO Oil-Feed ER Collet Holder
| Thông Số | Giá Trị |
|---|---|
| Taper Standard | JIS B6339 (BT30, BT40, BT50) – Japanese precision standard |
| Type | ERO (ER collet with Oil-feed internal coolant) |
| ER Collet Sizes | ER8, ER11, ER16, ER20, ER25, ER32, ER40 (6 sizes) |
| Clamping Range | Φ1 – Φ26mm continuous (depend on ER collet size) |
| Clamping Method | ER collet + nut (DIN 6499 standard, torque 80-120 Nm) |
| Run-out Accuracy | <0.005mm at 2×D projection (precision grade ER collets) |
| Coolant Pressure | ≤4MPa (40 bar max, recommend 2-3 MPa for optimal) |
| Coolant Flow Rate | 8-12 L/min (depend on holder size và tool shank diameter) |
| Coolant Channel | Φ3-6mm internal passages through ER collet nut |
| Tool Shank Requirement | Internal coolant holes Φ1-2mm (precision drills/cutters) |
| Max Speed | 12,000-25,000 RPM (follow ISO 15641 balance limits) |
| Material | Alloy steel body + hardened steel ER nut (HRC 58-62) |
| Balance Grade | G2.5@15000 RPM (precision balance for high-speed with coolant) |
| Collet Nut Torque | 80-120 Nm (depend on ER size: ER8=60Nm, ER40=150Nm) |
| CNC Requirement | Through-spindle coolant system (TSC) with 2-4 MPa pump |
| Applications | Precision drilling H7, reaming Ra 0.8μm, high-speed milling, micro machining |
Note: Hệ thống yêu cầu: (1) CNC with TSC system, (2) Tools with internal coolant holes, (3) Torque wrench for proper ER nut tightening (under-torque → tool pull-out, over-torque → collet damage). ER collets sold separately (recommend buying full ER collet set for flexibility).
Ứng Dụng Thực Tế BT-ERO Oil-Feed ER Collet Holder
1. Precision Drilling H7 Tolerance with Internal Coolant
Ideal cho precision drilling yêu cầu tight hole tolerance H7 (±0.015mm for Φ10) + internal coolant. Ví dụ: drilling Φ10×50mm holes H7 tolerance trong aluminum 6061-T6 hydraulic manifold. Setup: ERO16-BT40 + ER16-10mm collet + Φ10mm carbide drill (140° point, internal coolant Φ1.5mm holes) → coolant 3 MPa, 10 L/min (synthetic 5%) → drilling: 3500 RPM (Vc=110 m/min), feed 0.12 mm/rev, peck cycle Q=5mm → hole tolerance measured: Φ10.008mm (within H7: Φ10.000-Φ10.015) → run-out <0.005mm ensures straight hole, no wandering → tool life 800 holes per regrind (vs side lock 400 holes, run-out 0.02mm causes hole oversized Φ10.025mm).
2. Reaming Operations Ra 0.8μm Surface Finish
Critical cho reaming – finishing operation yêu cầu run-out <0.01mm để achieve surface finish Ra 0.8μm and hole tolerance H7. Ví dụ: reaming Φ12×40mm holes trong carbon steel S45C automotive component. Setup: ERO20-BT40 + ER20-12mm collet + Φ12mm carbide reamer (6 flutes, 45° chamfer, internal coolant Φ2mm center hole) → coolant 2 MPa, 8 L/min (soluble oil 8%) → reaming: 800 RPM (Vc=30 m/min slow speed for finish), feed 0.08 mm/rev (low feed prevent chatter) → surface finish measured: Ra 0.6μm (target Ra 0.8μm) → hole tolerance Φ12.006mm (H7 spec: Φ12.000-Φ12.018) → internal coolant flush chips immediately (prevent surface scratching).
3. High-Speed Milling Aerospace Aluminum (>20,000 RPM)
Optimized cho aerospace aluminum high-speed milling với internal coolant prevents built-up edge. Ví dụ: 3D contouring aluminum 7075-T6 aircraft structural component. Setup: ERO16-BT40 + ER16-6mm collet + Φ6mm carbide ball nose end mill (2 flutes, 30° helix, internal coolant through center) → coolant 2 MPa, 10 L/min (synthetic with aluminum additives) → milling: 22,000 RPM (Vc=415 m/min ultra-high speed), feed 2200 mm/min (0.05 mm/tooth), axial depth 0.2mm (finish pass), radial 3mm (50% cutter) → surface finish Ra 0.4μm (mirror finish), no BUE → tool life 15 hours cutting time (vs 8 hours external coolant). Tham khảo Sandvik aerospace machining guide.
4. Micro Drilling (<Φ3mm) with Internal Coolant
Essential cho micro drilling (Φ1-3mm) – very fragile tools cần precision clamping + coolant prevent breakage. Ví dụ: drilling Φ2×20mm holes (L/D=10:1) trong stainless steel SUS304 medical implant. Setup: ERO8-BT30 + ER8-2mm collet + Φ2mm carbide micro drill (internal coolant Φ0.5mm hole) → coolant 3.5 MPa (high pressure essential for micro drilling chip evacuation), 6 L/min (neat oil for lubrication) → drilling: 12,000 RPM (Vc=75 m/min), feed 0.04 mm/rev (very slow), peck cycle Q=0.5mm (frequent retract for micro drills) → run-out <0.005mm prevents drill breakage (Φ2mm drill very sensitive to radial force) → tool life 180 holes (vs 60 holes external coolant, chips clog hole → drill breaks).
5. Thread Milling with Internal Coolant
Hiệu quả cho thread milling – operation tạo threads bằng helical milling (vs tapping). Thread milling advantages: (1) No tap breakage risk, (2) One tool multiple thread sizes, (3) Internal coolant essential for chip evacuation. Ví dụ: thread milling M12×1.75 internal threads trong aluminum 7075 aerospace bracket. Setup: ERO16-BT40 + ER16-6mm collet + Φ6mm thread mill (3 flutes, M8-M16 range, internal coolant) → coolant 2 MPa, 8 L/min → thread milling: 4000 RPM, helical interpolation feed 800 mm/min, thread depth 1.75mm pitch → coolant flush chips from thread grooves → thread tolerance class 6H → tool life 500 threads per regrind. Tham khảo Emuge thread milling guide cho programming.
Thông Số Gia Công Tối Ưu BT-ERO Oil-Feed ER Collet Holder
| Material | Operation | Tool Diameter | Spindle (RPM) | Feed | Coolant Pressure | Coolant Type |
|---|---|---|---|---|---|---|
| Aluminum 6061 | Drilling | Φ10mm drill | 3500 | 0.12 mm/rev | 3 MPa | Synthetic 5% |
| Aluminum 7075 | High-speed milling | Φ6mm ball nose | 22,000 | 0.05 mm/tooth | 2 MPa | Synthetic + Al additives |
| Carbon Steel S45C | Reaming | Φ12mm reamer | 800 | 0.08 mm/rev | 2 MPa | Soluble oil 8% |
| Carbon Steel | Drilling | Φ8mm drill | 1500 | 0.10 mm/rev | 3 MPa | Soluble oil 8% |
| Stainless SUS304 | Micro drilling | Φ2mm micro drill | 12,000 | 0.04 mm/rev | 3.5 MPa | Neat oil |
| Stainless SUS304 | Precision drilling | Φ10mm drill | 1000 | 0.08 mm/rev | 3 MPa | Soluble oil 10% |
| Titanium Ti-6Al-4V | Drilling | Φ6mm drill | 800 | 0.05 mm/rev | 4 MPa | Semi-synthetic |
| Titanium | Thread milling | Φ6mm thread mill | 3000 | 600 mm/min | 4 MPa | Semi-synthetic |
| Inconel 718 | Precision drilling | Φ8mm drill | 500 | 0.04 mm/rev | 4 MPa | Neat oil + EP |
Note: Đây là starting parameters. Precision operations (reaming, finish drilling) giảm feed 30-40% for better finish, micro drilling (<Φ3mm) always use peck cycle Q=0.5-1mm, hard materials (>30 HRC) giảm speed 40-50%, titanium/Inconel use maximum coolant pressure 4 MPa. Verify ER collet nut torque: ER8=60Nm, ER16=80Nm, ER20=100Nm, ER32=120Nm, ER40=150Nm.
Câu Hỏi Thường Gặp Về BT-ERO Oil-Feed ER Collet Holder
BT-ERO oil-feed ER collet holder có cần máy CNC đặc biệt không? +
Có. Hệ thống yêu cầu CNC machining center có through-spindle coolant (TSC) system với pump capacity 2-4 MPa (same as BT-SLO). Additionally, CNC spindle cần high-speed capability (12,000-25,000 RPM) để tận dụng ER collet precision cho high-speed operations. Recommended CNC: Mazak VTC-800 (TSC + 20,000 RPM), DMG Mori NVX5100 (TSC + 18,000 RPM), Haas VF-4SS (High-Pressure Coolant option + 12,000 RPM). Nếu CNC không có TSC → dùng BT-ER collet holder standard (no coolant) + external nozzles thay thế.
ER collet nut cần tighten bao nhiêu torque? +
ER nut torque critical cho clamping security và run-out accuracy. Torque specifications: ER8: 60 Nm, ER11: 70 Nm, ER16: 80 Nm, ER20: 100 Nm, ER25: 120 Nm, ER32: 130 Nm, ER40: 150 Nm. Tool: spanner wrench + torque wrench (beam type hoặc click type). Procedure: (1) Insert tool + collet, (2) Hand-tighten nut, (3) Set torque wrench, (4) Tighten until click/beep, (5) Do NOT over-torque (damages collet). Under-torque → tool pull-out during machining, over-torque → collet deforms → run-out increases to 0.02mm. Tham khảo Haimer ER collet best practices cho detailed instructions.
BT-ERO holder run-out <0.005mm có thật sự cần thiết không? +
Depends on application: Precision drilling H7 – hole tolerance ±0.015mm → run-out 0.005mm = 33% tolerance → necessary. Reaming – Ra 0.8μm finish → run-out >0.01mm causes chatter marks → absolutely necessary. High-speed milling – Vc >300 m/min → run-out 0.01mm causes vibration → tool life reduced 50% → necessary. Roughing operations – tolerance ±0.1mm, Ra 6.3μm → run-out 0.02mm acceptable → side lock BT-SLO sufficient. Rule: nếu part tolerance <±0.05mm hoặc surface finish
ER collets có tốn kém không? Cần mua bao nhiêu collets? +
ER collets affordable compared với shrink-fit holders. Pricing: ER16 collet set (21 collets Φ1-10mm in 0.5mm increments) = $150-250 (depend on brand: China $150, Taiwan $200, Japan/Germany $250). Individual collet: $8-15 each. Recommendation: mua full ER collet set cho flexibility. Ví dụ: 1× ERO16-BT40 holder ($400) + 1× ER16 collet set 21pcs ($200) = $600 total → handle tools Φ1-10mm continuous range → equivalent to buying 10× shrink-fit holders ($400 each = $4000 total). ER collet set là investment 1 time, collets last 5-10 years with proper care (clean after use, avoid over-torque).
BT-ERO holder có thể dùng với tools không có internal coolant holes không? +
Có, nhưng mất coolant advantage. Hệ thống có thể clamp bất kỳ tool shank nào (with or without coolant holes) vì ER collet grips external diameter. Nếu tool không có internal coolant → coolant flow stops tại ER collet nut (không deliver vào cutting zone) → equivalent to standard ER holder with wasted TSC system. Solution: (1) Convert to external coolant – add nozzles aim tại tool → coolant effectiveness 40% vs internal, (2) Buy coolant-fed tools – upgrade drills/end mills to internal coolant versions (cost +30-50% vs standard tools) → unlock full potential. Recommendation: invest trong coolant-fed tool library cho critical operations (precision drilling, deep holes, hard materials).
📞 Liên Hệ Tư Vấn & Đặt Hàng BT-ERO Oil-Feed ER Collet Holder
An Mi Tools cung cấp bt-ero oil-feed er collet holder chính hãng từ Nhật Bản, bao gồm complete set: ERO holders (6 sizes ER8-ER40, BT30/40/50), full ER collet sets (ER8-ER40, precision grade <0.005mm), coolant-fed drills/end mills (HSS/carbide with internal coolant), ER collet nut wrenches, torque wrenches (60-150 Nm range), O-ring seal kits, storage cases, bảo hành 24 tháng. Đội ngũ kỹ thuật hỗ trợ verify CNC TSC compatibility, recommend ER size cho tool range, training ER collet proper tightening techniques và coolant system setup.
Related Products: Nếu không cần precision (<0.005mm run-out), consider BT-SLO oil-feed side lock holder (faster changeover, no torque wrench needed). Cho operations không cần coolant, xem BT-ER collet holder standard (precision <0.005mm, no internal coolant). Cho large diameter boring với coolant, tham khảo CBH large diameter fine boring head và fine boring head precision.
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