[Product Overview]

The 5C Collet Block Set is a simple yet incredibly powerful workholding solution for machinists and toolmakers. By inserting a standard 5C collet holding your workpiece into either the square or hexagonal steel block, you instantly create a rigid fixture that can be clamped directly in a milling vise or placed on a magnetic chuck. This allows you to machine parallel flats, square heads, hex nuts, or drill cross-holes with perfect angular accuracy. It is the fastest way to perform simple indexing operations (4-sided or 6-sided) on manual mills, CNC machines, and surface grinders.

[Key Features & Advantages]

• Rapid Indexing: The square block provides instant 90-degree indexing (4 divisions), while the hex block provides 60-degree indexing (6 divisions). Simply unclamp the vise, rotate the block to the next flat face, and re-clamp.

• High-Precision Grinding: All exterior surfaces and the internal 5C taper are precision-ground and hardened (typically HRC 45-50) to ensure parallelism and squareness within 0.0005" (0.012mm).

• Versatile Workholding: Can be held in a standard machine vise, clamped to a slotted angle plate, or placed directly on a magnetic chuck for precision surface grinding operations.

• Quick-Acting Closers: Sets often include cam-action lever closers or threaded nut closers, allowing for rapid clamping and unclamping of the 5C collet without needing a separate drawbar.

• Through-Hole Capability: The blocks are hollow, allowing long bar stock to pass completely through the collet and the block for machining the ends of long shafts.

[Why Partner with Pingyuan Zhenghao Machinery?]

• Direct Manufacturer Savings: Bypass trading companies and source premium precision fixtures directly from our factory for highly competitive wholesale pricing.

• Complete Ready-to-Use Sets: Our standard sets come complete with the square block, hex block, two closer nuts/levers, and a collet extractor ring, all packed in a fitted protective case.

• Strict Quality Control: Every block is rigorously inspected for dimensional accuracy, parallelism, and taper concentricity before packaging.

• OEM & Customization: We offer custom laser engraving of your brand logo and part numbers, along with tailored packaging solutions for retail distributors and catalog companies.

Frequently Asked Questions (FAQ) - Selection Guide

Q1: What is the difference between the square and hex block?

A: The square block has 4 flat sides, allowing you to index your part at 90-degree intervals (perfect for making square heads, cutting keyways on opposite sides, or drilling cross-holes at 90 degrees). The hex block has 6 flat sides, allowing for 60-degree indexing (ideal for machining hex nuts or 6-spline shafts).

Q2: How do I tighten the 5C collet inside the block?

A: The set includes a closer mechanism (either a threaded nut or a quick-acting cam lever) that threads onto the back of the 5C collet. As you tighten the nut or flip the lever, it draws the collet into the tapered bore of the block, securely clamping the workpiece.

Q3: Can I use these blocks on a surface grinder?

A: Yes, absolutely. Because the blocks are made of magnetic steel and are precision-ground perfectly flat and parallel, they are ideal for placing directly onto a magnetic chuck for grinding precise flats or angles on small cylindrical parts.

Q4: Do I need a special vise to hold these blocks?

A: No. The blocks are designed with perfectly parallel flat sides, so they can be clamped securely in any standard precision machine vise (like a Kurt-style vise) on your milling machine.

Dramatically reduce your setup times for small part machining with our 5C Collet Block Sets.

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