close
Choose Your Site
Global
Social Media
Spring Small Back Pull Collet SDC Collets DC Slim Collet
1. High accuracy extra slim collet
4. For deep hole drilling processing
| DC extra slim collet | |
| Model | d |
| DC04 | 2,3,4 |
| DC06 | 2,3,4,5,6 |
| DC08 | 3,4,5,6,7,8 |
| DC12 | 3,4,5,6,7,8,9,10 |
Standard ER collets are excellent for general-purpose machining, but their wide profile and bulky clamping nuts often cause interference when machining deep pockets, steep walls, or complex 3D mold cavities. The SDC / DC Slim Collet System solves this problem. Designed with a much narrower profile and a shallower taper angle (typically 8 degrees compared to ER's 16 degrees), the DC collet sits deeply within a specialized slim chuck. This design not only provides exceptional clearance for the tool holder but also places the gripping force closer to the cutting edge, significantly increasing rigidity and reducing vibration during high-speed micro-milling.
Ultra-Slim Profile: The defining feature of the DC system. The narrow diameter of the collet and its corresponding chuck allows for unparalleled access into tight spaces, deep cavities, and complex geometries, making it the preferred choice for mold makers and 5-axis machinists.
High-Precision Runout: Precision-ground to strict tolerances. We guarantee a standard Total Indicator Runout (T.I.R.) of ≤ 0.005mm (5 microns), with ultra-precision grades (≤ 0.003mm) available upon request. This minimizes chip load variations on micro-tools, dramatically extending tool life.
High Clamping Force (8° Taper): The shallow 8-degree taper angle provides a superior mechanical advantage compared to wider collets. As the collet is drawn into the chuck, it generates immense, uniform gripping force around the tool shank, preventing tool pull-out even at high RPMs.
Premium Spring Steel: Manufactured from high-quality, fatigue-resistant spring steel (such as SUJ2 or 65Mn) and heat-treated to HRC 44-48. This ensures the collet maintains its elasticity, accuracy, and gripping power over thousands of tool changes.
Excellent Dynamic Balance: The symmetrical, slim design inherently offers better balance than bulky collet nuts, making DC collets ideal for high-speed spindle applications (up to 30,000+ RPM) without inducing harmful vibrations.
Direct Manufacturer Savings: Bypass trading companies and source premium high-speed micro collets directly from our factory for highly competitive wholesale pricing.
Comprehensive Size Range: We manufacture the full spectrum of DC slim collets to cover all micro-machining needs:
DC6 / SDC6: Gripping range 1.0mm - 6.0mm
DC8 / SDC8: Gripping range 1.0mm - 8.0mm
DC10 / SDC10: Gripping range 1.0mm - 10.0mm
DC12 / SDC12: Gripping range 1.0mm - 12.0mm
Complete Tooling Systems: We also manufacture the corresponding high-precision Slim Collet Chucks (BT, SK, HSK, ISO tapers) to provide a complete, guaranteed-runout tooling solution.
Strict Quality Control: Every collet is individually inspected using high-precision optical comparators and runout gauges to ensure it meets our strict 5-micron standard before packaging.
Q1: What is the difference between SDC and DC collets?
A: In most manufacturing contexts, SDC and DC refer to the same style of slim collet. "DC" is the standard designation (often associated with the original Swiss design), while "SDC" (Slim DC or Super DC) is a common manufacturer variation. They share the same 8-degree taper and slim profile. Always verify the specific dimensions (length and maximum diameter) with our catalog to ensure compatibility with your chucks.
Q2: Can I use a DC collet in an ER collet chuck?
A:No, absolutely not. DC collets have an 8-degree taper angle, while ER collets have a 16-degree taper angle. Furthermore, the clamping mechanisms and nuts are completely different. DC collets must only be used in dedicated DC/SDC Slim Collet Chucks.
Q3: What is the gripping range of a DC collet?
A: Unlike ER collets, which typically have a 1mm collapse range (e.g., a 6mm ER collet can grip a 5mm to 6mm shank), DC collets are "on-size" or have a very limited collapse range (usually 0.5mm or less) to maintain their ultra-high precision. You must select the exact collet size that matches your cutting tool's shank diameter (e.g., use a 4.0mm DC collet for a 4.0mm shank).
Q4: Why are DC collets better for mold making than ER collets?
A: Mold making often requires machining deep, steep-walled cavities using small-diameter end mills. The bulky nut of an ER chuck will crash into the walls of the mold before the tool can reach the bottom. The slim profile of the DC chuck and collet provides the necessary clearance to reach deep into the cavity without interference, while also providing better runout for micro-tools.
Maximize your tool clearance and precision in high-speed milling with our SDC / DC Slim Collets.
Contact our sales team today for a complete catalog and bulk pricing.
