BT40 Series SLN Side-Lock End Mill Holder

BT40 Series SLN Side-Lock End Mill Holder

High-rigidity BT40 taper side-lock end mill holders with exceptional clamping force, available in 6-42mm clamping diameters and 75-200L lengths, designed for heavy-duty roughing and milling operations on BT40 CNC machining centers.
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Description

BT40 series SLN side-lock end mill holders are manufactured from high-strength alloy steel with overall vacuum quenching and precision grinding, the industry-standard tool holders for heavy-load machining applications on BT40 spindle CNC machining centers.
  1. Dual set screw side-lock clamping design delivers maximum gripping force and rigidity, eliminating tool slippage even under the most demanding heavy cutting loads.
  2. High-precision machining ensures ≤0.005mm runout accuracy at 4×D from the holder face, delivering excellent machining precision and surface finish.
  3. Comprehensive size range supports 6mm to 42mm tool shank diameters, covering all common end mill and drill sizes.
  4. Multiple length options (75L/100L/150L/200L/110L) accommodate various machining depths and complex workpiece geometries.
  5. Standard 7/24 taper design is 100% compatible with all mainstream BT40 spindle CNC machine tools.
  6. Black oxide surface treatment provides excellent corrosion resistance and long-term durability in harsh industrial environments.

Complete Specification Table (Unit: mm)

Model L L1 L2 L3 L4 L5 L6 D d1 d2 d3 T FIG Weight Price
BT40-SLN6-75 140.4 75 48 27 50 10 12 63 6 25 - M6 1 1.25KG
BT40-SLN8-75 140.4 75 48 27 50 12 14 63 8 28 - M8 1 1.3KG
BT40-SLN8-100 165.4 100 73 27 50 12 14 63 8 28 - M8 1 1.35KG
BT40-SLN10-75 140.4 75 48 27 55 14 15 63 10 35 - M10 1 1.3KG
BT40-SLN10-100 165.4 100 73 27 55 14 15 63 10 35 - M10 1 1.35KG
B40-SLN12-75 140.4 75 48 27 60 16 20 63 12 40 - M10 1 1.32KG
BT40-SLN12-100 165.4 100 73 27 60 16 20 63 12 40 - M10 1 1.35KG
BT40-SLN16-90 155.4 90 63 27 100 18 22 63 16 45 - M12 1 1.5KG
BT40-SLN16-100 165.4 100 73 27 100 18 22 63 16 45 - M12 1 1.55KG
BT40-SLN16-150 215.4 150 123 27 100 18 22 63 16 38 45 M10 2 1.7KG
BT40-SLN16-200 265.4 200 173 27 100 18 22 63 16 38 45 M10 2 2.0KG
BT40-SLN20-90 155.4 90 63 27 100 20 25 63 20 50 - M12 1 1.6KG
BT40-SLN20-100 165.4 100 73 27 100 20 25 63 20 50 - M12 1 1.65KG
BT40-SLN20-150 215.4 150 123 27 100 20 25 63 20 45 50 M12 2 1.8KG
BT40-SLN20-200 265.4 200 173 27 100 20 25 63 20 45 50 M12 2 2.0KG
BT40-SLN25-90 155.4 90 63 27 110 25 24 63 25 55 - M12 1 2.5KG
BT40-SLN25-100 165.4 100 73 27 110 25 24 63 25 55 - M12 1 2.6KG
BT40-SLN25-150 215.4 150 123 27 110 25 24 63 25 50 55 M12 2 2.8KG
BT40-SLN25-200 265.4 200 173 27 110 25 24 63 25 50 55 M12 2 3.0KG
BT40-SLN32-100 170.4 100 73 27 120 28 24 63 32 65 - M16 1 2.75KG
BT40-SLN32-150 215.4 150 123 27 120 28 24 63 32 58 63 M16 2 3.0KG
BT40-SLN32-200 265.4 200 173 27 120 28 24 63 32 58 63 M16 2 3.2KG
BT40-SLN40-105 175.4 105 78 27 120 32 30 63 40 73 - M16 1 3.5KG
BT40-SLN40-150 215.4 150 123 27 20 32 30 63 40 73 - M16 1 4.0KG
BT40-SLN40-200 265.4 200 173 27 120 32 30 63 40 73 - M16 2 4.5KG
BT40-SLN42-110 175.4 110 83 27 120 32 30 63 42 73 - M16 1 3.8KG

Parameter Explanation

  • L/L1/L2/L3/L4/L5/L6/D/d1/d2/d3 : Overall and mounting dimensions (unit: mm), corresponding to the engineering drawings
  • T : Thread specification of the side-lock set screw
  • FIG : Structural type identifier (1=standard single set screw type, 2=reinforced dual set screw type for longer lengths)
  • Weight : Net weight per unit (unit: KG)
  • Model Naming :
    • BT40: 7/24 taper spindle interface standard
    • SLN: Side-lock end mill holder series
    • The number after SLN indicates the maximum clamping diameter (e.g., SLN32 = 32mm clamping diameter)
    • The last number indicates the total length of the tool holder (e.g., 100 = 100mm length)

Applications

CNC Machining

Ideal for CNC lathe, milling and machining center operations, ensuring high-precision dimensional control and reliable tool holding for mass production.

Quality Control Labs

Suitable for quality inspection departments and calibration labs, providing accurate measurement data to verify product compliance with ISO and industry standards.

Mold & Die Making

Perfect for mold and die workshops, where micron-level precision tools and gauges are essential for complex cavity machining and final inspection.

OEM/ODM Projects

Customizable solutions for OEM and ODM manufacturing partners, offering tailored measuring tools and CNC accessories to meet unique production requirements.

Automotive Manufacturing

Designed for automotive component production lines, ensuring consistent precision and durability in engine parts, transmission components and assembly processes.

Aerospace & Precision Engineering

Ideal for aerospace and defense manufacturing, where ultra-high precision instruments and reliable tool holders meet strict quality and safety requirements.

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