[Product Overview]

When standard ER collet chucks struggle with tool slippage during heavy roughing cuts, the MT Milling Chuck (Power Chuck) is the ultimate solution. Designed for manual milling machines, boring mills, and large radial drills utilizing Morse Taper spindles, this chuck features a thick-walled body and a specialized nut packed with needle bearings. As you tighten the nut, the bearings compress the internal straight collet with immense, evenly distributed pressure. This results in a gripping force up to 3-4 times higher than a standard ER chuck, providing the extreme rigidity needed for large-diameter end mills and heavy material removal.

[Key Features & Advantages]

• Massive Gripping Force: The built-in needle bearing mechanism translates tightening torque into unparalleled radial clamping force, completely preventing end mill pull-out during heavy cuts.

• Extreme Rigidity: The thick-walled design of the chuck body absorbs heavy cutting vibrations, extending tool life and improving surface finish even during aggressive roughing.

• High-Precision Runout: The internal bore and external Morse Taper are precision ground in a single setup. Runout (T.I.R.) is strictly controlled to ≤ 0.005mm (0.0002") at 3 times the diameter (3D).

• Premium Material & Hardness: Constructed from high-quality 20CrMnTi alloy steel. The surface is case-hardened to HRC 56-60 for excellent wear resistance, while the core remains tough to withstand heavy shock loads.

• Versatile Straight Collet System: Uses standard heavy-duty straight collets (e.g., C20, C25, C32). You can clamp various tool shank sizes by simply swapping the internal straight collet.

[Why Partner with Pingyuan Zhenghao Machinery?]

• Direct Manufacturer Savings: Bypass trading companies and source heavy-duty milling accessories directly from our factory for highly competitive wholesale pricing.

• Strict Quality Control: Every power chuck is dynamically tested for clamping force and inspected using advanced concentricity testers before packaging.

• One-Stop Tooling Solution: We also manufacture the matching Straight Collets (SC/C type) and C-Spanner Wrenches, ensuring perfect compatibility.

• OEM & Customization: We can laser engrave your brand logo, part numbers, and custom specifications directly onto the chucks.

Frequently Asked Questions (FAQ) - Selection Guide

Q1: What is the difference between a Milling Chuck (Power Chuck) and an ER Collet Chuck?

A:

• ER Collet Chucks use a slotted, flexible collet and are great for general-purpose milling, drilling, and holding a wide range of odd sizes. However, they can slip under heavy loads.

• Milling Chucks (Power Chucks) use a solid, thick-walled straight collet and a needle-bearing nut. They offer significantly higher clamping force and rigidity, making them the superior choice for heavy roughing and large end mills.

Q2: How do I clamp different sized tools in this chuck?

A: The chuck itself has a fixed internal bore (e.g., 32mm for an MT4-C32 chuck). To hold a tool with a 32mm shank, you insert it directly. To hold smaller shanks (e.g., 10mm, 12mm, 20mm), you insert a Straight Reduction Collet (e.g., C32-10, C32-20) into the chuck first, and then insert your tool.

Q3: What drawbar thread do these MT shanks use?

A: Because milling creates heavy side loads, these chucks must be secured with a drawbar (MTB style). Standard metric threads are:

• MT3: M12 thread

• MT4: M16 thread

• MT5: M20 thread (Please verify your machine's drawbar thread before ordering).

Q4: Do I need a special wrench to tighten this?

A: Yes, power chucks require a specific C-Spanner (Hook Wrench) that fits into the slots on the outside of the bearing nut. Using the correct wrench ensures you can apply the necessary torque to achieve maximum clamping force.

Upgrade your heavy milling capabilities with our extreme-grip power chucks.

Contact our sales team today for a complete catalog and bulk pricing.