GBC-SCS15 Aluminum Clamp Type Shaft Collar – 15mm Bore
The GBC-SCS15 aluminum clamp-type shaft collar fits 15 mm bore shafts. OD 35 mm, face width 12 mm, M5 clamping screw, optional 5 mm keyway. A high-volume standard for conveyor belt drives, offset printing ink-train rollers, and textile machinery tension shafts.
MOQ: 50 pcs. Minimum order value USD 1,500; mixed orders and trial quantities welcome.
15mm Bore Aluminum Clamp Shaft Collar – Conveyor Belt & Printing Machinery Axial Positioning
| Parameter | Value | Note |
|---|---|---|
| SKU / Model | GBC-SCS15 | GBC SCS Series |
| Bore Diameter (d) | 15 mm | Shaft tolerance h6 recommended |
| Outer Diameter (D) | 35 mm | |
| Face Width (B) | 12 mm | |
| Clamping Screw | M5 socket-head cap screw | 5 mm hex key required |
| Slot Width (W) | 1.5 mm | Enables radial flex for clamping |
| Keyway Width (K) | 5 mm | Standard: plain bore; keyway optional on request |
| Shaft Tolerance | 15.000 / 14.989 mm | ISO 286 h6 |
| Material | Aluminium alloy | Anodized finish available on request |
| MOQ | 100 pcs | Custom engineering drawings accepted |
Product Overview
The GBC-SCS15 occupies one of the most frequently specified positions in the SCS aluminium collar range. The 15 mm shaft diameter is a ubiquitous standard across conveyor drive rollers, printing press ink-train rollers, and textile machine tension shafts in both Asian and European manufacturing traditions. With a 35 mm OD, 12 mm face width, and M5 clamping screw, the SCS15 delivers the combination of compact radial footprint and meaningful axial holding force that these medium-duty continuous-operation applications require. The aluminium body resists the light oil-mist atmospheres common in printing rooms while keeping the collar mass well below the threshold that would affect roller dynamic balance at typical line speeds.
Key Features
Shaft Surface Protection
The split-clamp principle spreads clamping force uniformly across the full bore circumference, preventing the point indentation and fretting corrosion that set-screw collars create at the contact point. The shaft remains undamaged and fully repositionable throughout the product's service life.
M5 High-Torque Clamping
The M5 socket-head cap screw provides a proof-load capacity approximately 60% higher than the M4 screws used in smaller SCS collars. This increase in clamping force is matched to the larger bore and OD at this size range, ensuring reliable retention under sustained bidirectional axial loading.
Dual Axial-Location Function
A single collar acts as a positive end-stop against a bearing or housing shoulder. A pair of collars sandwiches any shaft-mounted component at a freely adjustable position — a versatile alternative to machined shaft steps that eliminates re-machining costs when axial positions need to change.
Lightweight Aluminium Alloy Body
Aluminium alloy construction keeps collar mass below 30 g for all bore sizes in the 15 mm OD range, minimising the rotational inertia penalty in dynamic drive assemblies and the static load penalty on vertically mounted shafts.
5 mm Keyway Option for Torque Locking
A standard 5 mm DIN 6885 keyway can be broached on request, enabling the collar to transmit rotational torque simultaneously with axial positioning. Specify at order — default supply is plain bore.
Typical Application Scenarios
Conveyor Belt Drive Systems
Driven and idler rollers in flat-belt and modular-belt conveyors mount the SCS15 as both an axial locator against side frames and a thrust face for roller-end bearings. The repeatable clamp position allows conveyor lane widths to be reconfigured without reworking the shaft or machining new shoulders.
Offset Printing Press Ink Trains
Ink-distribution rollers in sheet-fed and web offset presses run on 15 mm chrome-plated shafts at surface speeds up to 8 m/s. The aluminium SCS15 provides the precise lateral roller register required for colour-to-colour ink-film uniformity without adding the mass imbalance that heavier steel collars would introduce.
Textile Knitting Machine Guides
Yarn-guide rods in flat-bed knitting machines use SCS15 collars as limit stops for carriage travel, replacing machined aluminium blocks that require re-machining every time the fabric width changes. Field repositioning takes under two minutes per collar with a standard hex key.
Dimensional Guide & Shaft Fit Specification
The three principal dimensions — bore d = 15 mm, outer diameter D = 35 mm, and face width B = 12 mm — define the spatial envelope of the collar in an assembly. The slot width W = 1.5 mm runs the full face width and is the feature that allows the collar to flex radially as the M5 screw closes the gap. Specify the mating shaft to ISO 286 h6 tolerance (15.000 / 14.989 mm) for the optimal combination of sliding fit before clamping and maximum retention force after clamping.
GBC accepts custom orders for alternative bore tolerances (H7, js6), reduced OD profiles to clear adjacent components, extended face widths for higher axial holding force, and surface treatments including natural anodize, hard anodize (25 µm), and electroless nickel plating. Submit your engineering drawing via the contact page for a fast quotation.
Model Selection Guide
If your application uses a 14 mm shaft — common in European packaging drives — the GBC-SCS14 is the direct predecessor with identical OD and face width. For 16 mm shafts, particularly IEC servo motor outputs, the GBC-SCS16 is the natural next step.
| Model | Bore | Relation |
|---|---|---|
| GBC-SCS14 | 14mm | ← Smaller |
| GBC-SCS15 | 15 mm | ◀ Current |
| GBC-SCS16 | 16mm | → Larger |
Installation Procedure
- Prepare the shaft: Clean and degrease the shaft in the clamping zone. Verify diameter within h6 tolerance (15.000 / 14.989 mm). Remove any burrs or nicks with a fine file.
- Slide and position: Slide the GBC-SCS15 onto the shaft to the required axial location. Use a calibrated depth gauge or a pre-machined spacer as a reference for repeatable positioning.
- Clamp progressively: Using a 5 mm hex key, tighten the M5 screw in two or three incremental steps, checking axial position after each step to correct any settling. Torque M5 screw to 4.0 N·m. In printing applications with cyclic lateral loads from ink-film pressure, apply medium-strength threadlocker to the M5 screw and re-verify torque after 500 operating cycles.
- Load test: Apply the expected axial service load (manually or via the driven machine) and confirm zero collar movement. For vibrating or cyclic-load applications, re-verify screw torque after the first full operating shift.
Frequently Asked Questions
Is aluminium an appropriate material for a shaft collar in an oil-mist printing environment?
How do I set two SCS15 collars to sandwich a roller bearing on a 15mm shaft?
Does the SCS15 differ from SCS14 in anything other than bore size?
Related Products
Explore adjacent sizes and related components in the GBC range:
- GBC-SCS14 – 14mm bore aluminum clamp shaft collar — smaller bore for finer shaft diameters
- GBC-SCS16 – 16mm bore aluminum clamp shaft collar — next size up for higher axial capacity
- Browse the full GBC SCS Shaft Collar series — available bore sizes from 6 mm to 60 mm
Get a Quote or Submit Your Drawing
Minimum order quantity is 100 pcs. Custom bore tolerances, keyway options, extended face widths, and surface treatments are available. Supply your detailed engineering drawing for an accurate quotation from the GBC team.
The GBC-SCS15 aluminum clamp-type shaft collar fits 15 mm bore shafts. OD 35 mm, face width 12 mm, M5 clamping screw, optional 5 mm keyway. A high-volume standard for conveyor belt drives, offset printing ink-train rollers, and textile machinery tension shafts.
MOQ: 50 pcs. Minimum order value USD 1,500; mixed orders and trial quantities welcome.
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