Shaft-Friendly Clamping
The split closes around the shaft and avoids relying on a set screw bearing directly on one point of the shaft surface.
EP-SCS Series · 6 mm to 60 mm Bore
Aluminum Single Split Shaft Clamps for Precise Axial Positioning
EP-SCS clamp collars provide a removable axial stop or locating reference on round shafts used in automation, linear motion, motor assemblies and general machinery. The range covers eighteen metric bore sizes, with model-specific outside diameter, width, screw, split and keyway data for practical fit checks.
6–60 mm boresM4–M10 clamp screwsOptional keyway by model
Precision machining & automationWhy Clamp Style
Position Components Without a Point-Contact Set Screw
A single-split collar closes around the shaft through its clamp screw, distributing the clamping action around the bore instead of relying on one screw point against the shaft. That makes the format useful for adjustable stops, guide-shaft references and maintenance positions where the collar may need to be moved and reset.
Adjustable Axial Location
One collar can establish a stop; two collars can create an adjustable axial location window around another component.
Optional Keyway
Keyway K dimensions are listed for most models from EP-SCS10 upward, while the standard collar remains plain-bore.
Product Range
Popular EP-SCS Shaft Clamp Sizes
Start with the shaft diameter and open the model page that matches the measured bore. Each product page places the exact d/D/B/M/W/K values beside the dimensional drawing, then explains the envelope, screw access, keyway and RFQ checks that matter before ordering.
Aluminum Single Split Shaft Clamp 20mm — EP-SCS20
EP-SCS20: 20 mm bore, 40 mm OD, 12 mm width, M5 clamp screw, split W 1.5 mm, keyway K 6 mm option.
Bore 20 mmOD 40 mmM5
Aluminum Single Split Shaft Clamp 22mm — EP-SCS22
EP-SCS22: 22 mm bore, 45 mm OD, 12 mm width, M5 clamp screw, split W 1.5 mm, keyway K 6 mm option.
Bore 22 mmOD 45 mmM5
Aluminum Single Split Shaft Clamp 6mm — EP-SCS06
EP-SCS06: 6 mm bore, 20 mm OD, 10 mm width, M4 clamp screw, split W 1 mm. No standard keyway K dimension…
Bore 6 mmOD 20 mmM4
Aluminum Single Split Shaft Clamp 25mm — EP-SCS25
EP-SCS25: 25 mm bore, 45 mm OD, 12 mm width, M5 clamp screw, split W 1.5 mm, keyway K 8 mm option.
Bore 25 mmOD 45 mmM5
Aluminum Single Split Shaft Clamp 8mm — EP-SCS08
EP-SCS08: 8 mm bore, 30 mm OD, 10 mm width, M4 clamp screw, split W 1.5 mm. No standard keyway K dimension…
Bore 8 mmOD 30 mmM4
Aluminum Single Split Shaft Clamp 30mm — EP-SCS30
EP-SCS30: 30 mm bore, 55 mm OD, 15 mm width, M6 clamp screw, split W 1.5 mm, keyway K 8 mm option.
Bore 30 mmOD 55 mmM6
Applications
Where Aluminum Shaft Clamps Fit Into Motion Systems
Axial positioning is a simple function, but the surrounding machine changes the selection details. A compact linear axis may be controlled by carriage clearance, while a motor or industrial-machine assembly may be controlled by neighboring couplings, guards, bearings or service access.
CNC & AutomationGuide-shaft stops, axial references and compact machine positioning.
Motors & DrivesLocation beside couplings, pulleys and other shaft-mounted components.
Robotics & 3D PrintingLightweight stops and locators on lead screws and guide shafts.
Industrial MachineryMechanical stops and component location in packaging, conveying and custom machinery.Series Selection
Start With Shaft Diameter, Then Check the Envelope
Match bore d to the measured shaft first. After that, verify outside diameter D, body width B and access to the clamp screw, because a nominally correct bore can still interfere with a frame, bearing block, pulley, carriage or guard.
If a keyway is required, use the listed K value only as the collar-side reference and include the mating key and shaft geometry in the enquiry. For replacement work, add a photo or sketch when the available space is not obvious from the shaft diameter alone.
- Bore range: 6–60 mm.
- Outside diameter: 20–95 mm by model.
- Body width: 10–22 mm by model.
- Clamp screws: M4 to M10 by model.
Technical Reference
EP-SCS Series Size Chart
The chart lets buyers compare the entire metric range without jumping between product pages. Use it to shortlist a model, then open the specific product page for installation-space checks and enquiry guidance.
| Model | Bore d (mm) | OD D (mm) | Width B (mm) | Screw M | Split W (mm) | Keyway K (mm) |
|---|---|---|---|---|---|---|
| EP-SCS06 | 6 | 20 | 10 | M4 | 1 | — |
| EP-SCS08 | 8 | 30 | 10 | M4 | 1.5 | — |
| EP-SCS10 | 10 | 30 | 10 | M4 | 1.5 | 3 |
| EP-SCS12 | 12 | 30 | 10 | M4 | 1.5 | 4 |
| EP-SCS13 | 13 | 30 | 10 | M4 | 1.5 | 4 |
| EP-SCS14 | 14 | 35 | 12 | M5 | 1.5 | 5 |
| EP-SCS15 | 15 | 35 | 12 | M5 | 1.5 | 5 |
| EP-SCS16 | 16 | 35 | 12 | M5 | 1.5 | 5 |
| EP-SCS18 | 18 | 40 | 12 | M5 | 1.5 | 6 |
| EP-SCS20 | 20 | 40 | 12 | M5 | 1.5 | 6 |
| EP-SCS22 | 22 | 45 | 12 | M5 | 1.5 | 6 |
| EP-SCS25 | 25 | 45 | 12 | M5 | 1.5 | 8 |
| EP-SCS30 | 30 | 55 | 15 | M6 | 1.5 | 8 |
| EP-SCS35 | 35 | 60 | 15 | M6 | 2 | 10 |
| EP-SCS40 | 40 | 70 | 18 | M8 | 2 | 12 |
| EP-SCS45 | 45 | 80 | 22 | M10 | 2 | 14 |
| EP-SCS50 | 50 | 85 | 22 | M10 | 3 | 14 |
| EP-SCS60 | 60 | 95 | 22 | M10 | 3 | 18 |
Knowledge Base
Selection, Installation and Application Notes
Use the engineering articles when the buying question is broader than one bore size. Topics cover collar-style comparison, size selection, installation, keyway decisions, CNC applications, shaft-surface care and custom-order preparation.
OEM Shaft Clamp Ordering Guide
Prepare a custom RFQ with the dimensions and application details needed for review.
Read Article →6mm to 60mm Shaft Clamps: Choosing the Right Size
Navigate the EP-SCS bore range by shaft size, envelope and machine context.
Read Article →How to Reduce Shaft Damage With a Clamp Collar
Selection and installation practices that reduce avoidable shaft marking and fit problems.
Read Article →RFQ Support
Need a Standard Size, Keyway or Non-Standard Bore Review?
Send shaft diameter, preferred EP-SCS model, quantity, keyway requirement and a drawing or photo when the fit is tight. Add any application-critical requirement such as impact, unusual environment or documentation so it can be addressed in the quotation.