Product No.: 330101-00-20-10-02-05 - General Introduction
This product is a precision clamping shaft collar with an integrated anti-rotation key, designed for a 20mm diameter shaft. It belongs to a modular system of mechanical components where the part number defines its exact specifications. This variant combines two distinct locking features: a primary radial clamping mechanism and a secondary positive drive mechanism, making it ideal for applications requiring absolute zero-backlash torque transmission and precise axial positioning.
Detailed Parameters
| Parameter Category | Specification | Details / Notes |
|---|---|---|
| Bore Size (I.D.) | 20 mm | The "-20-" segment specifies the precise inner diameter for mounting on a 20mm shaft (tolerance typically h7 or h8). |
| Outer Diameter (O.D.) | Approx. 28 - 32 mm | The "-10-" refers to a standard series size, resulting in a proportional O.D. that ensures adequate wall strength for clamping and keyway integrity. |
| Width / Thickness | Approx. 10 - 15 mm | Standard width for a collar of this diameter, providing sufficient material for the dual locking features. |
| Primary Clamping | Single-Piece, Radial Clamp Screw(s) | The "-02-" indicates the use of one or two radial socket head set screws (likely M4 or M5) tightened perpendicularly to the shaft to generate frictional holding force. |
| Secondary Locking | Integrated Parallel Keyway | The critical "-05" suffix specifies an integrated parallel keyway machined along the entire bore length. This requires a matching key (e.g., 6mm x 6mm DIN 6885) to be fitted between the collar and a keyway on the shaft. |
| Keyway Specification | Width: 6 mm (for 20mm shaft, per ISO/R773) Depth: 3.0 mm (approx.) | Standard metric parallel key dimensions for a 20mm shaft. |
| Primary Material | Carbon Steel (e.g., 1045) with Black Oxide Finish or Stainless Steel (304/316). | Carbon steel offers high strength and cost-effectiveness; stainless steel provides corrosion resistance. Aluminum is less common for this size/function. |
| Finish | Black Oxide (for steel) or Passivated (for stainless). | Provides corrosion resistance, reduces light reflection, and minimizes galling. |
| Weight | Approx. 50 - 120 grams | Weight varies based on exact dimensions and material density (steel being heavier). |
| Key Feature | Dual-Security Locking System: Combines friction clamping (for axial holding and slight adjustment) with positive key drive (for absolute rotational lock and high torque transmission). | This eliminates any possibility of slippage under high torsional or reversing loads. |
| Runout / Concentricity | < 0.03 mm TIR | Precision-machined to ensure minimal runout, critical for balanced operation and accurate positioning. |
| Installation Note | Requires a keyway on the shaft. The collar's keyway must be aligned with the shaft's keyway, and a standard parallel key inserted, before tightening the clamp screw(s). |
Primary Application Scenarios
This component is critical in power transmission systems where both precise location and absolute rotational lock are non-negotiable.
Gearbox & Reducer Assembly:
Gear & Sprocket Mounting: Used to mount gears, timing belt pulleys, or chain sprockets onto intermediate or output shafts within gear reducers. The keyway transmits the full torque, while the clamp screw takes up any slight fit clearance and prevents axial creep.
High-Torque Servo & Stepper Motor Applications:
Coupling Hub Locking: Serves as the locking hub for connecting a high-torque flexible coupling to a motor or drive shaft. The key handles the torque, while the clamp ensures the coupling cannot walk off the shaft.
Agricultural & Construction Machinery Drivelines:
PTO (Power Take-Off) Shaft Adapters: Used on PTO shafts to secure drive yokes or implement adapters, withstanding the shock loads and high torque typical in these applications.
Machine Tool Spindle Accessories:
Tool Holder or Chuck Backing Collar: On simpler milling or drilling spindles, it can act as a positively locked backing collar for tool holders or chucks, preventing rotation under cutting loads.
Heavy-Duty Conveyor Drive Systems:
Drive Pulley / Sprocket Retention: Secures the main drive pulley or sprocket to its shaft on larg
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