A split clamp ring-commonly referred to as a two-piece shaft collar or clamp-on shaft collar-provides reliable axial positioning and component location without marring the shaft surface. Its two-piece design allows for direct inline installation, adjustment, and disassembly without removing adjacent bearings, sprockets, or pulleys. Precision-machined split faces ensure uniform clamping force and high axial load capacity under continuous or reversing loads.
Key Features
Two-Piece Split Architecture: Enables direct installation and removal around existing shafts without stripping down surrounding mechanical assemblies.
360-degree Uniform Clamping Force: Distributes holding pressure evenly around the shaft circumference, maximizing axial holding power while eliminating localized shaft scoring or point-load distortion.
High-Tensile Hardware: Assembled using high-strength socket head cap screws (DIN 912 / ISO 4762 Grade 12.9 or A2/A4 stainless steel) to ensure repeatable tightening torque without thread stripping.
Machined Face Squareness: Bore faces are precision-machined perpendicular to the bore to guarantee accurate axial seating for mounted components.
Technical Specifications
|
Parameter |
Metric Range |
Inch (Imperial) Range |
|
Bore Diameter (ID) |
6 mm to 150 mm |
1/4 inch to 6 inches |
|
Outer Diameter (OD) |
Proportional to standard collar proportions |
Proportional to standard collar proportions |
|
Width (Thickness) |
9 mm to 35 mm |
3/8 inch to 1-1/2 inches |
|
Bore Tolerances |
+0.013 mm / +0.051 mm |
+0.0005 in / +0.0020 in |
|
Screw Specifications |
M3 to M16 (Hex socket head) |
#6-32 to 5/8-11 |
|
Standard Finishes |
Black Oxide, Trivalent Zinc, Clear Anodized, Passivated |
Materials & Machining Processes
Material Options
Carbon Steel (1045 / 12L14): Provides high structural rigidity and impact resistance; supplied with protective black oxide or zinc plating.
Aluminum (6061-T6): Lightweight with high strength-to-weight ratio and natural corrosion resistance; ideal for high-speed dynamic or reciprocating machinery.
Stainless Steel (303 / 304 / 316): Delivers maximum corrosion resistance for food processing, marine, pharmaceutical, and washdown environments.
Manufacturing Workflow
CNC Bar Turning: Lathe machining of raw bar stock to maintain tight concentricity between the outer diameter and raw bore.
Milling & Splitting: Precision cutting of the ring into two matching halves, maintaining paired serialization to guarantee exact fit during final assembly.
Thread Tapping: CNC tapping of clamping screw holes perpendicular to the split interface.
Deburring & Surface Finishing: Vibratory tumbling followed by designated chemical plating, anodizing, or passivation.
Applications
Conveyor Systems
Positioning rollers, guide rails, and heavy-duty drive drums.
Packaging & Filling Machinery
Securing indexing cams, timing belt pulleys, and sensor mounting brackets.
Factory Automation & Robotics
Acting as adjustable mechanical hard stops on linear slides and servo motor drive shafts.
Agricultural & Off-Highway Equipment
Linkage pivots, actuator stops, and power transmission positioning.
Customization & OEM Services
Build-to-Print Manufacturing: Custom bore sizes, non-standard widths, special flange integrations, or custom keyways machined directly to customer CAD data.
Material Traceability: Mill Test Certificates (MTC) supplied upon request to verify raw material chemical composition and mechanical properties.
Prototyping & Production Scaling: Rapid prototype sampling (7 to 10 days) for engineering design validation; scalable CNC production capacity for batch runs from 100 to over 50,000 pieces.
Quality Control & Inspection
Dimensional Verification: 100% bore gauge and micrometer checks on critical dimensions; optical comparators used for profile and symmetry validation.
Thread Integrity Checks: Go/No-Go thread plug and ring gauges applied to all tapped screw holes.
Inspection Equipment: Coordinate Measuring Machines (CMM), digital height blocks, and surface roughness testers.
Documentation: Dimensional inspection reports and RoHS/REACH compliance documentation provided per shipment requirements.
Packaging & Shipping
Corrosion Prevention: Protective anti-rust oil coating applied to carbon steel components; VCI (Volatile Corrosion Inhibitor) poly bags used for overseas moisture protection.
Secure Bulk Packaging: Individual or multi-pack poly bagging arranged inside heavy-duty, double-walled export cartons with foam separation to prevent transit scratching or impact damage.
Logistics Support: Direct worldwide shipping via air freight, LCL/FCL ocean freight, or international express courier, complete with standard palletization and ISPM 15 heat-treated wooden crates.
Frequently Asked Questions
Q: What is your minimum order quantity (MOQ) for standard vs. custom clamp-on shaft collars?
A: For standard catalog items, MOQ starts at 50 pieces per size. For custom dimensions, non-standard widths, or specific alloy grades, MOQ starts at 200 pieces per run.
Q: What is the standard production lead time?
A: In-stock standard configurations ship within 3 to 5 business days. Custom OEM production runs typically require 15 to 25 business days depending on material availability and secondary plating schedules.
Q: What 2D and 3D CAD file formats do you accept for custom orders?
A: We accept STEP, IGES, SolidWorks (.sldprt), DXF, and PDF engineering drawings with explicitly defined tolerances and surface finish callouts.
Q: How do two-piece split clamp rings maintain holding power without damaging the shaft?
A: The two-piece configuration allows equal distribution of radial clamping force across 360 degrees of the shaft when socket head cap screws are torqued to specified limits, preventing point-load gouging or friction burns.
Q: Can you supply material test reports (MTC) with our shipment?
A: Yes. Full material traceability certificates (EN 10204 3.1 certification) are available upon request during the initial RFQ stage.
Q: What surface treatments do you offer for corrosive environments?
A: We offer chemical passivation for stainless steel, clear or colored anodizing for aluminum, and zinc plating or black oxide for carbon steel. Special PTFE or electroless nickel coatings are available upon request.
Request a Quote
To obtain an accurate quotation for your application, please provide the following technical details:
Engineering Drawing / Model: 2D PDF drawing with dimensional tolerances and/or 3D CAD model (STEP / IGES).
Material Specification: (e.g., Stainless Steel 304, Aluminum 6061-T6, Carbon Steel 1045).
Dimensions: Bore diameter (ID), Outer diameter (OD), and Width (W).
Quantity: Annual volume forecast or per-batch order quantity.
Surface Finish / Coating: (e.g., Clear Anodized, Trivalent Zinc Plated, Passivated).
Special Requirements: Specific packaging methods, quality documentation (MTC), or target delivery timeline.
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