BT Series SLA Side Lock Weldon Flat Tool Holder (Heavy Cutting Anti-slip End Mill Chuck)

BT Series SLA Side Lock Weldon Flat Tool Holder (Heavy Cutting Anti-slip End Mill Chuck)

Fully precision ground quenched alloy steel side lock tool holders with standard BT30 / BT40 / BT50 machine spindle taper. Adopts Weldon flat side compression locking structure for square shank end mills, featuring ultra-high clamping rigidity and zero slip performance, specially designed for heavy rough milling, side face milling and large stock removal processing on vertical CNC machining centers.
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Description

This BT-SLA side lock tool holder is a heavy-duty rigid clamping fixture developed for high-load rough machining. It is integrally forged from high-strength 40Cr alloy steel and subjected to overall quenching plus full hard precision grinding, solving the slipping and pulling-out problems of cutters during large-allowance rough cutting.
  1. Weldon Flat Side Anti-slip Locking Mechanism
    The inner clamping bore is matched with standard Weldon flat square-shank cutters. Tighten the lateral locking screw to directly compress the flat surface of the tool shank to achieve rigid full-surface locking. There is no relative sliding between the tool and the holder even under high-feed heavy rough milling, effectively avoiding dimensional errors and tool breakage caused by cutter slipping.
  2. Fully Hard-ground Standard BT Spindle Taper
    BT30, BT40 and BT50 tapers undergo complete hard precision grinding, forming perfect surface contact with the machine spindle taper hole. It provides excellent repeat positioning accuracy during automatic tool change and maintains stable overall rigidity under ultra-high spindle speed and heavy cutting load.
  3. Deformation-resistant Wear-resistant Hardened Steel Body
    The whole tool blank is integrally quenched to high hardness, with mirror polishing and anti-rust protective coating on the outer surface. It can resist permanent deformation and metal wear under long-term continuous heavy cutting, and maintain consistent clamping stability in mass production for a long time.
  4. Complete Standard Size Series
    Covers three mainstream spindle tapers BT30, BT40 and BT50; the inner clamping bore D1 ranges from 6mm to 50mm, equipped with multiple standard overall length specifications (75L / 90L / 100L / 150L). Short stubby models are for ultra-rigid heavy cutting, while long extended models meet deep cavity machining demands.
  5. Wide Heavy Machining Application Scenarios
    Mainly used for heavy rough milling, step surface milling, deep slotting and large-allowance blank roughing. Widely matched with vertical machining centers for mold steel processing, automotive structural parts, mechanical thick steel parts and hardware batch rough machining.

Dimension Specification Note

Only the finished product assembly render is provided in this material; the complete standardized dimension parameter table (including D1 clamping bore, D2 chuck outer diameter, L total length, M locking screw thread) can be supplied separately upon request.
Common standard model format example: BT40-SLA20-90L

Model Naming Rule

Standard naming format: BT[Spindle Taper]-SLA[Side Lock Series Code]-[D1 Clamping Bore Diameter]-[Total Length]L
Example: BT40-SLA20-90L
  • BT40: Standard BT40 CNC machine spindle taper
  • SLA: Side lock Weldon flat tool holder series code
  • 20: Inner clamping bore D1 = 20mm
  • 90L: Overall total length L = 90mm

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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