Product Features
SLN Side-Lock Tool Holders (also known as Weldon Side-Lock Holders) achieve clamping by utilizing a lateral locking screw that bears directly against the tool's flattened shank surface. Distinguished by their simple structure and powerful clamping force, these holders occupy a prominent position in the field of heavy-duty machining.
Exceptional Clamping Force: The locking screw secures directly against the tool's flattened shank to create a "positive lock," fundamentally preventing the tool from rotating or being pulled out. In clamping applications involving a diameter of Φ20 mm, the clamping force of a side-lock holder can reach levels comparable to those of hydraulic holders (exceeding 900 Nm)-a figure significantly higher than that of ER collets (approximately 220 Nm).
High Rigidity and Vibration Resistance:The integrated, one-piece construction-combined with the lateral locking design-enables the holder to withstand the immense axial forces generated during intermittent cutting operations, such as those involving large-diameter end mills or deep-slot machining. This ensures that the tool remains firmly in place, even under heavy-duty cutting conditions.
Cost-Effectiveness: Featuring a simple structure and low manufacturing costs, a side-lock tool holder is priced at approximately one-tenth the cost of a hydraulic holder-and even less than one-third the cost of a high-grip holder.
Superior Coolant Sealing: Eliminating the need for a collet, the tool holder makes direct contact with the cutting tool, thereby achieving an excellent sealing effect. Consequently, most internal-coolant tools-such as U-drills (rapid drills/high-feed drills)-are secured using side-lock tool holders.
Multi-Standard Compatibility: Compatible with a wide range of spindle interface standards-including BT, CAT, NT, SK, and HSK-these holders typically accommodate clamping diameters ranging from 6 mm to 50 mm, allowing for quick and convenient tool installation and removal.
FAQ
Q: What is the main difference between an SLN side-lock tool holder and an ER collet?
A: ER collets rely on friction for clamping; while they offer high precision, their torque capacity is limited. Side-lock tool holders utilize a "hard-locking" screw mechanism, providing superior clamping force; however, they typically exhibit lower dynamic balance and rotational accuracy. Side-lock holders are recommended for heavy-duty cutting operations, whereas ER collets are preferred for finishing tasks and high-speed applications.
Q: What machining scenarios are suitable for this tool?
A: It is suitable for low-speed, high-torque, heavy-duty cutting operations-such as face milling or rough milling of steel and cast iron workpieces-as well as applications requiring strong clamping force and effective coolant sealing, such as internal-coolant U-drilling. It is not suitable for high-speed machining or high-precision finishing operations, nor is it recommended for use with tools featuring long overhangs or slender geometries.
Q: How can tool pull-out be prevented during high-speed cutting?
A: When locking the tool, first pull it firmly in the direction of rotation to ensure the tool shank's flat surface makes tight contact with the locking screw; then, tighten the screw to eliminate any axial clearance. Some high-end tool holders feature a dual-screw design, utilizing separate locking points on both the flat surface and the chamfer to further reinforce the tool's resistance to pull-out.
Q: Is a side-lock tool holder limited to clamping only a single shank diameter?
A: Yes. Since side-lock tool holders do not utilize collets, a single holder can only clamp tools of one specific shank diameter; consequently, they offer limited versatility. Users must select a tool holder with the exact specifications that match the diameter of the tool shank being used.
Q: How is the dynamic balancing performance?
A: Due to the presence of side-mounted screw holes, side-lock tool holders exhibit an asymmetrical mass distribution. Furthermore, the clamped tool requires a ground flat surface on its shank, which further impacts balance. As a result, their dynamic balancing precision typically falls within the G6.3@10,000 rpm range (though some high-end products can achieve G2.5@25,000 rpm). These holders are primarily designed for medium-to-low speed heavy-duty cutting applications, rather than high-speed precision finishing.
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