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All major taper types and sizes covered with gauge lengths available up to 200mm
    
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BT30, BT40 & BT50 end mill holders with various styles & gauge lengths
SK30, SK40 & SK50 end mill holders with various styles & gauge lengths
HSK25, HSK32, HSK40, HSK50, HSK63, HSK80 & HSK100 end mill holders with various styles & diameters
Provides excellent rigidity for ultimate reliability, repeatability and machining quality.
End mill holders with coolant jets can greatly improve surface finish and tool life.
When your machining application demands maximum rigidity and torque transmission, end mill holders (also known as side lock arbors) are the go-to choice. Ideal for roughing, slotting, and heavy-duty milling, these holders provide a secure grip on your cutting tools for consistent and powerful performance.
At Cutwel, we stock a wide range of side lock holders to suit all major spindle types including BT, HSK, ISO, and SK (DIN69871), with sizes ranging from Ø6mm to Ø32mm.
End mill holders use a side-locking screw to clamp onto the flat of Weldon-style shank tools. This creates a direct mechanical connection between the tool and the holder, ensuring a strong and stable setup that’s ideal for high-torque applications.
They’re widely used in rough machining, slotting, and general-purpose milling where extreme accuracy isn’t as critical as tool retention and stability.
High Clamping Force - Solid locking on the Weldon flat prevents tool pull-out
Ideal for Heavy Cuts - Perfect for roughing, high-feed milling, and interrupted cuts
Simple & Robust Design - Easy tool setup with just an Allen key
Reduced Vibration - Increased rigidity minimises chatter under load
Cost-Effective - Affordable and reliable option for most CNC machines
When selecting a side lock arbor, consider the following:
Spindle Type
Choose the correct interface for your machine: BT40, HSK63, ISO40, or DIN69871.
Shank Diameter
Match the holder bore size to your end mill shank (e.g., Ø12mm, Ø16mm, Ø20mm). Most holders are available in metric and imperial sizes.
Length Requirements
Standard or extended-reach holders are available depending on your application depth.
Balanced HoldersFor high-speed applications, choose balanced holders rated for G6.3 or G2.5 at 8,000–20,000 RPM.
Coolant Options
Some holders are available with internal coolant supply for better chip evacuation and cooling during deep cuts.
Wide Selection - Metric & imperial sizes in stock for all common tapers
Fast Delivery - UK-wide next-day options available
Expert Support - Our technical team helps you find the right solution
Great Value - High-quality holders at competitive prices
Whether you're running a high-volume roughing job or need a tough and reliable holder for general milling, our range of end mill holders and side lock arbors has you covered. Browse our full selection online and upgrade your machining performance with Cutwel today.
Cutwel are experts at supplying a wide range of end mills and slot drills, both material specific and general purpose, to cater to your precise machining needs. Our portfolio includes carbide, HSS and powder metal cutters, therefore we can cater for every budget, material, set up and application.
We pride ourselves on excellent availability and UK next day delivery so you can get your hands on the right milling cutter for your requirements, as quick as possible.
Our knowledgeable team of experts can help you find the right milling cutter that perfectly aligns with your needs. So why wait? Browse through and buy from our collection of milling cutters online or alternatively please call 01924 869 610 or email sales@cutwel.net for any advice or queries.
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