SP-8 SP-12 SP-15 SP-22 SP-25 SP-30 Ball Transfer Bearing Unit Conveyor Roller

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SP-8 SP-12 SP-15 SP-22 SP-25 SP-30 Ball Transfer Bearing Unit Conveyor Roller

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Types: SP8, Carbon Steel

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Ball Transfer Bearing Unit Conveyor Roller — Smooth Omnidirectional Movement for Every Assembly

When your conveyor line, assembly table, or material-handling fixture demands frictionless, multi-directional load movement, a mismatched or undersized ball transfer unit becomes the bottleneck that slows every shift. Makers, fabricators, and industrial assemblers who need reliable omnidirectional rolling — without tools, without guesswork — will find the SP series ball transfer bearing unit built precisely for that challenge.

Each unit consists of a hardened steel main ball seated in a precision-formed housing packed with smaller load-bearing balls, available in carbon steel or 304 stainless steel. The SP designation (SP8, SP12, SP15, SP22, SP25, SP30) refers to the main ball diameter in millimeters (approximately 0.31" to 1.18"), giving you a clear size matrix to match load capacity and mounting footprint to your application.

Typical use cases include DIY conveyor roller tables for woodworking shops, light-duty assembly line transfer stations, 3D-printer enclosure sliding panels, and CNC router material-staging fixtures — all scenarios where smooth omnidirectional ball transfer bearing movement reduces operator fatigue and cycle time.

🔩 Compatibility: Fits standard countersunk or through-hole mounting patterns. Carbon steel variants suit dry indoor environments; 304 stainless steel variants are suited for washdown, humid, or mildly corrosive settings. Verify mounting hole diameter against your selected SP size before ordering.

✅ Key Features of These Ball Transfer Bearing Units

🔄True Omnidirectional Rolling — The hardened main ball rotates 360° in any direction, enabling smooth load transfer without repositioning the workpiece.
📐Six Size Options (SP8–SP30) — Main ball diameters from 8 mm (~0.31") to 30 mm (~1.18") let you match load capacity and housing footprint precisely to your fixture design.
⚙️Dual Material Choice — Carbon steel units offer cost-effective strength for dry indoor use; 304 stainless steel units resist oxidation in humid or washdown environments.
🏗️Compact, Flush-Mount Housing — Low-profile pressed-steel shell installs flush into countersunk holes, keeping the work surface clear and snag-free.
🔧Tool-Free Ball Replacement — The main ball can be lifted out for cleaning or replacement without disassembling the housing, minimizing downtime on active lines.
🏭Wide Application Range — Suitable for conveyor tables, assembly fixtures, packaging lines, DIY roller tables, and sliding panel guides across light-to-medium duty loads.

📐 Technical Specifications — Ball Transfer Bearing Units

Product Type	Ball Transfer Bearing Unit (Conveyor Roller)
Series / Size Designation	SP8, SP12, SP15, SP22, SP25, SP30
Main Ball Diameter	8 mm / 12 mm / 15 mm / 22 mm / 25 mm / 30 mm (0.31"–1.18")
Material Options	Carbon Steel; 304 Stainless Steel
Housing Construction	Pressed steel shell with inner load-bearing ball array
Load Capacity	See variant options
Housing Outer Diameter	See variant options
Mounting Type	Countersunk / through-hole flush mount
Finish — Carbon Steel	Zinc-plated or black oxide (varies by batch)
Finish — Stainless Steel	Natural brushed 304 SS
Operating Temperature	See variant options
Package Contents	See variant options

❓ Frequently Asked Questions

How do I choose the right SP size for my application?

Match the SP number to the main ball diameter in millimeters: SP8 = 8 mm, SP12 = 12 mm, SP15 = 15 mm, SP22 = 22 mm, SP25 = 25 mm, SP30 = 30 mm. Larger balls support higher loads and suit heavier workpieces. For light DIY conveyor tables, SP12 or SP15 is a common starting point; for heavier industrial fixtures, SP22–SP30 is recommended. Check the housing outer diameter against your mounting hole before ordering.

What is the load capacity of each SP size?

Load capacity scales with ball diameter. As a general guide, smaller units (SP8–SP12) handle light loads typically under 20 kg per unit, while larger units (SP22–SP30) can support significantly higher loads per unit. For exact rated load figures, please refer to the variant detail page or contact us to confirm specifications for your specific use case.

Will the carbon steel version rust if used outdoors or in a damp environment?

Carbon steel units are best suited for dry indoor environments. Exposure to moisture, humidity, or chemicals can cause surface oxidation over time. If your application involves washdown, outdoor exposure, or a humid workshop, select the 304 stainless steel variant, which offers significantly better corrosion resistance without requiring additional coatings.

Are these ball transfer units compatible with standard conveyor table mounting holes?

Yes — the SP series uses a standard countersunk flush-mount design compatible with most DIY and light-industrial conveyor table hole patterns. Verify the housing outer diameter of your chosen SP size matches the hole diameter in your table or fixture plate. If you are building a new table, drill holes to match the housing OD of your selected size.

Can I mix carbon steel and stainless steel units on the same table?

Yes, you can mix material types on the same surface. However, for consistent corrosion performance in humid or washdown environments, it is advisable to use all stainless steel units. Mixing materials in corrosive environments may result in galvanic interaction at contact points over time.

How do I install or replace the main ball in an SP unit?

The main ball in most SP-series units can be lifted out of the housing without tools for cleaning or replacement. Simply press the ball to one side of the housing rim and lift it free. Reseating is done by pressing the ball back into the housing until it seats against the inner ball array. No disassembly of the housing is required for routine maintenance.

What industries or projects are these ball transfer units best suited for?

SP ball transfer bearing units are widely used in DIY woodworking conveyor tables, CNC router material-staging fixtures, packaging and sorting lines, assembly workstations, 3D-printer enclosure sliding panels, and light-duty warehouse transfer stations. Any application requiring smooth, omnidirectional load movement across a flat surface is a strong candidate.

🛒 Select your size and material type above, then add to cart.

SP-8 SP-12 SP-15 SP-22 SP-25 SP-30 Ball Transfer Bearing Unit Conveyor Roller

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Beschreibung

Ball Transfer Bearing Unit Conveyor Roller — Smooth Omnidirectional Movement for Every Assembly

✅ Key Features of These Ball Transfer Bearing Units

📐 Technical Specifications — Ball Transfer Bearing Units

❓ Frequently Asked Questions

SP-8 SP-12 SP-15 SP-22 SP-25 SP-30 Ball Transfer Bearing Unit Conveyor Roller

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