GBC-SCS35 Aluminum Clamp Type Shaft Collar – 35mm Bore
The GBC-SCS35 aluminum clamp-type shaft collar fits 35 mm bore shafts. OD 60 mm, face width 15 mm, M6 screw, 2 mm wide slot, optional 10 mm keyway. The widened slot eases assembly on threaded or grooved shafts in heavy bulk-materials conveyor drives, mining auxiliary equipment, and stone-crushing plant transfer conveyors.
MOQ: 50 pcs. Minimum order value USD 1,500; mixed orders and trial quantities welcome.
35mm Bore Aluminum Clamp Shaft Collar – Widened Slot & 60mm OD for Heavy Conveyor & Mining Auxiliary Drives
| Parameter | Value | Note |
|---|---|---|
| SKU / Model | GBC-SCS35 | GBC SCS Series |
| Bore Diameter (d) | 35 mm | Nominal; shaft h6 tolerance recommended |
| Outer Diameter (D) | 60 mm | |
| Face Width (B) | 15 mm | Extended width for higher axial bearing area |
| Clamping Screw | M6 socket-head cap screw | 6 mm hex key required |
| Slot Width (W) | 2.0 mm | Radial flex gap for clamping action |
| Keyway Width (K) | 10 mm | DIN 6885 Form A; plain bore is default |
| Shaft Fit (ISO h6) | 35.000 / 34.984 mm | Sliding fit before clamping |
| Material | Aluminium alloy | Hard-anodize & electroless nickel available |
| MOQ | 100 pcs | Custom engineering drawings accepted |
Product Overview
The GBC-SCS35 pushes further into heavy industrial territory with a widened 2 mm slot — double that of the SCS22 and SCS25 — combined with a 60 mm OD and 15 mm face width. The wider slot is not an arbitrary dimension: at 35 mm bore, the collar wall thickness at the slot cross-section is sufficient to accommodate the extra gap without compromising hoop stiffness, while the increased gap makes it substantially easier to slide the collar over shaft threads, keyways, and snap-ring grooves during assembly — a practical advantage when building up heavy shaft assemblies in the field without precision alignment fixtures. The M6 screw at 35 mm bore approaches its upper practical load range and is specified here at a design torque of 8 N·m, delivering axial holding forces in the 2.5–3.5 kN range on h6-tolerance shafts — adequate for the class of heavy bulk-materials conveyor and quarry plant auxiliary drives that this collar is engineered to serve. The 10 mm keyway is the widest in the SCS series, following DIN 6885 for 35 mm bore and enabling direct coupling to sprockets and sheaves carrying full motor-rating torque at this shaft size.
Key Features
Zero Shaft Surface Damage
The split-clamp design wraps clamping force uniformly around the shaft circumference, eliminating the localised indentation and fretting fatigue caused by set-screw contact. This is particularly valuable on ground or hard-chrome shaft surfaces where any surface damage accelerates seal and bearing wear adjacent to the collar.
M6 High-Capacity Clamping
The M6 socket-head cap screw is the correct choice for bore diameters in the 35 mm range, delivering clamping torque capacity and proof load matched to the wall section and surface area of the 60 mm OD collar body for reliable retention under the heavy-duty axial loads at this shaft size.
15 mm Extended Face Width
The 15 mm face width provides a wider axial contact band on the shaft than smaller SCS collars. This distributes the axial reaction force over a greater shaft surface area, reducing contact pressure and enabling the collar to hold higher sustained axial loads without risk of bore deformation under long-term service.
Field-Adjustable Axial Positioning
Collar position can be changed during commissioning or maintenance using only a 6 mm hex key — no shaft removal, no bearing housing disassembly, no machining. This makes SCS collars significantly faster to reconfigure than machined shaft steps or welded thrust collars.
10 mm DIN Keyway — Torque Locking Option
The 10 mm keyway follows DIN 6885 Form A for 35 mm bore, enabling simultaneous axial location and rotational torque transmission. Default supply is plain bore — specify keyway at time of order.
Typical Application Scenarios
Heavy Bulk-Materials Belt Conveyor Drives
Head-pulley and drive-pulley shafts in quarry, aggregate, and port bulk-handling conveyors run at 35 mm in plummer-block bearing assemblies handling belt tensions above 10 kN. The SCS35 positions bearing inner rings under these sustained high loads, providing the axial retention capacity — supported by the M6 clamp force and 15 mm face width — that prevents shaft walk during the stop-start duty cycles of fully loaded conveyors.
Mining Auxiliary Equipment Shafts
Ventilation fan shafts, ore-feeder vibrating-screen eccentric shafts, and underground conveyor drive shafts in mining operations use 35 mm journals as a standard cross-section for auxiliary drives in the 2.2–4.0 kW power range. The SCS35 provides the robust axial location needed in high-vibration underground environments where periodic maintenance access is limited and collar drift would go undetected for extended periods.
Crushing & Screening Plant Conveyor Transfers
Transfer conveyor drive shafts in stone-crushing and screening plants operate in extremely abrasive environments where shaft surface protection is critical. The SCS35 clamp design prevents the shaft pitting created by set-screw collars, preserving the shaft surface for the operating life of the equipment and avoiding the premature shaft replacement that pitting-induced fatigue cracks would otherwise necessitate.
Dimensional Guide & Shaft Fit Specification
The GBC-SCS35 is defined by bore d = 35 mm, outer diameter D = 60 mm, and face width B = 15 mm. The slot width W = 2.0 mm runs the full face width, providing the radial flex gap that closes as the M6 screw is tightened. Specify the mating shaft to ISO 286 h6 (35.000 / 34.984 mm) for a sliding pre-installation fit and maximum post-clamping retention. Tighter shaft tolerances such as g6 will reduce retention force; looser tolerances such as h8 should be avoided for duty cycles involving sustained axial loads.
GBC accepts custom specifications including extended face widths up to 25 mm, reduced OD profiles for confined housing installations, twin-screw clamping configurations for maximum holding force, and specialised surface treatments for corrosive or food-contact environments. Submit your engineering drawing via the GBC contact page for a fast quotation.
Model Selection Guide
For 30 mm bore applications in agricultural and medium-conveyor duties where M6 clamping is also needed, the GBC-SCS30 provides the same M6 screw at a 55 mm OD. For 40 mm bore heavy industrial applications requiring M8 clamping, the GBC-SCS40 steps up with a 70 mm OD and 18 mm face width.
| Model | Bore | Relation |
|---|---|---|
| GBC-SCS30 | 30mm | ← Smaller |
| GBC-SCS35 | 35 mm | ◀ Current |
| GBC-SCS40 | 40mm | → Larger |
Installation Procedure
- Shaft preparation: Measure the shaft diameter with a calibrated micrometer to confirm it falls within h6 tolerance (35.000 / 34.984 mm). Degrease the clamping zone and remove burrs with a flat file.
- Collar placement: Slide the GBC-SCS35 onto the shaft to the required axial position. For heavy assemblies, use a mallet and a soft brass drift to move the collar if shaft features resist free sliding.
- Progressive clamping: Insert a full-length 6 mm hex key and tighten in three incremental steps — 30%, 60%, then full torque — checking position after each step. Torque M6 screw to 8.0 N·m using a full-length 5 mm hex key. Apply medium-strength threadlocker to screw threads before tightening. In mining and quarry environments, mark the screw head with a paint pen after tightening so that any rotation due to self-loosening is immediately visible during inspection rounds.
- Operational verification: After initial operation under load, re-check screw torque. For high-vibration environments, apply medium-strength threadlocker before final tightening and mark the screw head for visual drift detection during inspections.
Frequently Asked Questions
What effect does the 2mm slot width have on clamping behaviour compared to the 1.5mm slot in SCS25 and SCS30?
Can the 10mm keyway in SCS35 transmit full motor-rating torque for a 2.2kW motor at typical conveyor speeds?
How do I prevent the SCS35 from loosening in a high-vibration underground mining environment?
Related Products
Browse adjacent sizes and related drive components in the GBC SCS series:
- GBC-SCS30 – 30mm bore aluminum clamp shaft collar — smaller bore for lower shaft diameter requirements
- GBC-SCS40 – 40mm bore aluminum clamp shaft collar — next larger size with higher axial load capacity
- Full GBC SCS Shaft Collar Range — bore sizes 6 mm to 60 mm, all available with custom specifications
Request a Quote or Submit a Custom Drawing
Minimum order quantity is 100 pcs. GBC supplies custom bore tolerances, keyway options, extended face widths, twin-screw configurations, and corrosion-resistant surface treatments. Provide your engineering drawing for an accurate quotation.
The GBC-SCS35 aluminum clamp-type shaft collar fits 35 mm bore shafts. OD 60 mm, face width 15 mm, M6 screw, 2 mm wide slot, optional 10 mm keyway. The widened slot eases assembly on threaded or grooved shafts in heavy bulk-materials conveyor drives, mining auxiliary equipment, and stone-crushing plant transfer conveyors.
MOQ: 50 pcs. Minimum order value USD 1,500; mixed orders and trial quantities welcome.
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