Locking shaft collars keep components in place, minimize vibration, and protect alignment in machinery, automation, and DIY projects. The options below focus on double-split or screw-clamp designs, known for easy installation and strong gripping power without damaging shafts. This guide highlights five top picks available on Amazon, covering a range of bore sizes and materials to suit automotive, industrial, and tool setups. Each product includes key features to help you compare compatibility and performance at a glance.
| Product | Bore | Outer Diameter | Material / Finish | Notes |
|---|---|---|---|---|
| AZSSMUK 1″ Bore Double Split Shaft Collar | 1 inch | 1-3/4 inches | Black Oxide | Four piece set; double split; easy to install |
| AZSSMUK 1-1/8″ Double Split Collar | 1-1/8 inch | 1-7/8 inches | Black Oxide | Two piece set; strong grip; durable |
| AZSSMUK Clamping Shaft Collar, 1″ | 1 inch | 1-3/4 inches | Black Oxide | 2-piece; double split; quick install |
| AZSSMUK 3/4″ Double Split Shaft Collar | 3/4 inch | 1-1/2 inches | Metal; finish not specified | 2-piece; reliable clamping |
| PATIKIL Bore 50mm Double Split Shaft Collar | 50 mm (approx. 2.0 in) | 78 mm | Black | Two-pack; high clamping force; corrosion resistant |
Note: Bore sizes are listed in each product’s description. When selecting a collar, match the bore to the shaft diameter and consider outer diameter and width to ensure a proper fit within your machine’s space.
AZSSMUK 1″ Bore Double Split Shaft Collar Black Oxide Set Screw Style (4 PCS)
The AZSSMUK 1″ bore double split collar is designed for quick installation with a 1/4-28 set screw. The set includes four pieces, offering flexibility for multiple shafts or a spare. The double-split design provides even clamping around the shaft, reducing the risk of slip under load. A 1″ bore with a 1-3/4″ outside diameter and 1/2″ height balances compact size with reliable grip, making it suitable for light industrial applications and DIY projects where space is limited.
TonGass 8-Pack Zinc Plated Carbon Steel 3/4″ Bore Shaft Collar Set
TonGass offers a budget-friendly eight-pack of 3/4″ bore shaft collars. Made from zinc-plated carbon steel, these collars deliver corrosion resistance and robust strength for automotive and industrial uses. With an outer diameter of 1-1/4″ and a clamp screw diameter of 5/16-18″, these screw-style collars are straightforward to install and adjust, making them practical for technicians, hobbyists, and DIY enthusiasts seeking reliable, versatile locking solutions at a lower cost per piece.
AR-PRO 1” Bore Solid Steel Shaft Collars (4-Pack)
AR-PRO’s 1″ bore shaft collars come in a 4-piece value pack with socket cup-point set screws. The collars use carbon steel with a zinc coating for corrosion resistance, boasting a 1-5/8″ outer diameter and 5/8″ width. The combination of a robust metal core and protective coating supports axial and radial stability in machinery, making these a solid choice when durability and cost-efficiency are priorities in industrial equipment or home shop setups.
AZSSMUK Shaft Collar Bore 1-1/8” Double Split Black Oxide (2 Pieces)
This AZSSMUK 1-1/8″ bore double split collar provides a precise clamp with a 1/4-28 set screw. The two-piece design supports straightforward mounting and adjustments in tight spaces. With an outside diameter of 1-7/8″ and a height of 1/2″, it is well-suited for medium-duty machinery, conveyors, and equipment requiring secure axial positioning without shaft deformation.
TonGass 8-Pack Zinc Plated Carbon Steel 1″ Bore Shaft Collars Set
TonGass returns with a 1″ bore option in an eight-pack, featuring zinc-plated carbon steel for corrosion resistance and dependable strength. Outer diameter is 1-5/8″ with a 5/8″ width. The screw-style clamp engages securely around the shaft using a 5/16-18 clamp screw. The set is popular for maintenance, repair, and fabrication projects, offering reliable locking collars in bulk for multi-assembly setups or spare parts inventory.
AZSSMUK Clamping Shaft Collar, Black Oxide Plating, 1″ Bore Size (2-Piece)
This two-piece AZSSMUK clamp-on collar uses a black oxide finish and a 1″ bore for reliable retention. The 2-piece construction provides easy installation and re-positioning, especially on longer shafts or assemblies requiring repositioning without disassembly. The collar features a 1/4-28 set screw and a 1-3/4″ outside diameter, offering strong clamping while minimizing shaft damage during tightening.
AZSSMUK Double Split Clamp-On Shaft Collars, 3/4″ Bore (2-Piece)
AZSSMUK’s 3/4″ bore double split collar is available in a 2-piece set with a 1/2″ height and 1-1/2″ outside diameter. The 1/4-28 set screws enable precise clamping onto smaller shafts, making this option ideal for compact machinery, robotics, and hobby projects where space is at a premium and secure positioning is essential.
PATIKIL Bore 50mm Double Split Shaft Collar (2 Pack)
PATIKIL presents a 2-pack of double split shaft collars with a 50 mm (approximately 2.0 in) bore and a 50 mm outer diameter. The thickness is 19 mm, and the two-piece construction works with 4 set screws. This locking collar is designed for enhanced clamping force and reduced shaft damage in machine tools and environments with moisture or chemicals, offering resilience for demanding applications.
Buying Guide: Key Purchase Considerations
When choosing a locking collar for a shaft, consider these factors to ensure a secure fit and reliable performance:
- Shaf t bore size: Match the bore precisely to the shaft diameter. Minor deviations can cause slip or excessive stress on the shaft.
- Locking design: Double-split collars provide even clamping and are forgiving of minor shaft imperfections, while screw-style collars offer straightforward installation and adjustability.
- Material and coating: Carbon steel with zinc plating offers good strength and corrosion resistance; black oxide finishes reduce wear but require compatible environments.
- Outer diameter and width: Ensure the collar fits within available space and provides enough clamping area to resist axial movement under load.
- Installation method: Two-piece designs are easier to install in tight spaces or on existing assemblies without removing the shaft ends.
- Screw size and torque: Use the correct screw size (commonly 1/4-28 or 5/16-18) and avoid overtightening to prevent shaft damage.
- Pack size: For multi-shaft setups or inventory planning, consider whether a larger pack or fewer pieces better matches your project scope.
Comparative Perspectives
- Durability: Solid steel and zinc-coated collars typically offer longer service life in harsh environments, whereas lighter alloys may be suitable for light-duty use.
- Ease of maintenance: Two-piece or double-split designs simplify repositioning and maintenance without removing other components.
- Availability and variety: A broad range of bore sizes and outer diameters helps accommodate many shaft configurations, from 3/4″ to 2″ and beyond.
- Cost considerations: Value packs deliver lower per-piece cost, beneficial for workshops with frequent collar replacements.
All products listed provide secure locking options for shafts across DIY, automotive, and industrial settings. Selection should balance bore precision, environmental exposure, and installation practicality to achieve consistent performance and shaft stability.