GBC-SCS13 Aluminum Clamp Type Shaft Collar – 13mm Bore
The GBC-SCS13 aluminum clamp-type shaft collar is purpose-made for 13 mm bore IEC-standard motor and servo shafts. OD 30 mm, width 10 mm, M4 screw, optional 4 mm keyway. Eliminates bore modification when retrofitting European-standard drives into existing machinery.
MOQ: 50 pcs. Minimum order value USD 1,500; mixed orders and trial quantities welcome.
13mm Bore Aluminum Clamp Shaft Collar – European-Standard Motor Shaft Fit with 4mm Keyway
| Parameter | Value | Note |
|---|---|---|
| SKU / Model | GBC-SCS13 | GBC SCS Series |
| Bore Diameter (d) | 13 mm | Nominal; shaft tolerance h6 recommended |
| Outer Diameter (D) | 30 mm | |
| Face Width (B) | 10 mm | |
| Clamping Screw | M4 socket-head cap screw | Hex key driven |
| Slot Width (W) | 1.5 mm | Allows radial flex for clamping |
| Keyway Width (K) | 4 mm | Standard: no keyway; optional on request |
| Material | Aluminium alloy | Lightweight, corrosion-resistant |
| Surface | Natural / anodized on request | |
| MOQ | 100 pcs | Custom drawings accepted |
Product Overview
The GBC-SCS13 addresses a gap that trips up many procurement engineers: the 13 mm shaft diameter common on European-standard IEC frame motors and certain imported servo actuators that do not align with the more prevalent 12 mm or 14 mm increments. By matching the exact 13 mm bore to IEC 60034-14 shaft tolerances, the SCS13 eliminates the field improvisation of boring out a 12 mm collar or under-clamping a 14 mm unit. It shares the 30 mm OD and 10 mm face width of its immediate neighbours, and the available 4 mm keyway option satisfies IEC coupling keyway dimensions for direct motor-shaft connections in light conveying and agitation drives.
Key Features
Zero Shaft Damage
The split-clamp mechanism distributes clamping force uniformly around the shaft circumference, eliminating the stress concentrations and surface gouging associated with set-screw designs. Shafts can be reused or repositioned without refurbishment.
Aluminium Alloy Construction
The aluminium alloy body provides an excellent strength-to-weight ratio, reducing rotational inertia in dynamic applications while offering natural corrosion resistance in dry industrial environments.
Dual Function: Axial Stop & Locator
Mount a single collar as an end-stop against a bearing or housing shoulder. Alternatively, sandwich a component between two collars to create an adjustable axial position that can be reconfigured without removing the shaft.
Single-Screw Rapid Installation
One M4 socket-head screw closes the collar gap, providing full clamping force in under 60 seconds. No tapping, no adhesive, no shaft modification required — ideal for field installation and iterative prototyping.
Optional Keyway for Torque Locking
A 4 mm keyway channel can be broached on request, enabling the collar to transmit rotational torque in addition to providing axial location — effectively combining two separate components into one.
Typical Application Scenarios
IEC Frame Motor Direct Drives
Small IEC 63 and IEC 71 frame motors in European-origin conveyor systems and agitators frequently output on 13 mm shafts per EN 50347. The SCS13 mounts directly without bore modification, slashing lead time versus custom-machined collars.
Imported Servo Actuator Retrofits
Replacement of Asian-origin servo actuators with European equivalents in retrofit projects often leaves an unmatched 13 mm shaft stub. The SCS13 provides an immediate axial-location solution that bridges legacy shaft sizes during phased equipment upgrades.
Textile Machinery Tension Rollers
Compact tension-roller assemblies in knitting and weaving machines route fabric over 13 mm guide shafts. The SCS13 sets roller lateral position without requiring the machined step shoulders that add cost and lead time to replacement shafts.
Dimensional Guide
The dimensional drawing above illustrates the three principal measurements: d (bore diameter, 13 mm) defines the shaft fit; D (outer diameter, 30 mm) determines the radial space envelope and clamping surface area; B (face width, 10 mm) sets the axial footprint on the shaft. The slot of width W = 1.5 mm runs the full face width and allows the collar body to flex radially as the clamping screw is tightened. All dimensions follow ISO 286 fits — specify the mating shaft to h6 tolerance for optimal clamping performance.
Custom bore tolerances, OD reductions, alternative slot widths, and surface treatments (hard anodize, black anodize, electroless nickel) are available from GBC. Supply a detailed engineering drawing for quotation.
Model Selection Guide
If your shaft is 12 mm, the GBC-SCS12 with its 4 mm keyway is the appropriate choice. For 14 mm shafts — particularly on Asian-standard motors — step up to the GBC-SCS14, which introduces M5 clamping screws and a larger 35 mm OD.
| Model | Bore | Position |
|---|---|---|
| GBC-SCS12 | 12mm | ← Smaller |
| GBC-SCS13 | 13 mm | ◀ Current |
| GBC-SCS14 | 14mm | → Larger |
Installation Procedure
- Inspect the shaft: Verify the shaft diameter is within h6 tolerance (13.000 / 12.991 mm) and the surface is clean, degreased, and free of burrs or nicks.
- Position the collar: Slide the GBC-SCS13 onto the shaft to the required axial position. Use a depth gauge or reference stop block to ensure accurate placement before clamping.
- Tighten the clamping screw: Insert the 4 mm hex key and tighten progressively — two or three partial turns, checking position after each turn. Torque M4 screw to 2.5 N·m. Verify shaft diameter with a calibrated digital calliper before installation — 13 mm and 12.7 mm (1/2 inch) shafts look identical by eye but the 0.3 mm difference will produce insufficient clamping if the wrong collar is fitted.
- Verify retention: Apply the expected axial load manually and confirm zero movement. For dynamic applications, re-check torque after the first 50 operating cycles as collars may settle slightly during initial clamping.
Frequently Asked Questions
Why does a 13mm shaft size exist alongside 12mm and 14mm?
Is the SCS13 keyway compatible with standard IEC keyway dimensions?
Can I order SCS13 without a keyway for pure axial-location duty?
Related Products
Complete your shaft assembly with other components from the GBC range:
- GBC-SCS12 – 12mm bore aluminum clamp shaft collar — the next smaller size for tighter bore requirements
- GBC-SCS14 – 14mm bore aluminum clamp shaft collar — the next larger size for increased axial capacity
- Full GBC Shaft Collar Range — browse all bore sizes from 6 mm to 60 mm in the SCS series
Request a Quote or Technical Support
Minimum order quantity is 100 pcs. Custom bore tolerances, keyway options, surface treatments, and non-standard dimensions are available — supply your engineering drawing for a fast quotation from GBC.
The GBC-SCS13 aluminum clamp-type shaft collar is purpose-made for 13 mm bore IEC-standard motor and servo shafts. OD 30 mm, width 10 mm, M4 screw, optional 4 mm keyway. Eliminates bore modification when retrofitting European-standard drives into existing machinery.
MOQ: 50 pcs. Minimum order value USD 1,500; mixed orders and trial quantities welcome.
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