Answering the common buyer question: which t slot linear bearing is right for your 45, 15, or 10 series aluminum extrusion? This guide spotlights five well-suited options, each chosen for durability, compatibility, and ease of installation. Ideal for workshop builders, CNC setups, and DIY automation projects, these bearings fit common T-slot profiles and help achieve smooth, precise movement. The included table gives a quick comparison to help you decide which model matches your extrusion size and load needs.
| Product | |||
|---|---|---|---|
| 8020, 45-6525, 45 Series, 3 Mount Double Flange Short Aluminum Linear Bearing for 45mm Aluminum Extrusion | 45 Series | Compact linear slides on 45mm profiles | Brake holes and double flange |
| LD-Teemm HGH15CA Linear Slider Bearing, 2pcs | HG15 (C) Series | High-precision CNC-like motion | Square bearing blocks with high rigidity |
| 8020, 6526, 15 Series, 3 Slot Mount Double Flange Long Bearing for 1.5″ Extrusion | 15 Series | Longer travel on 1.5″ profiles | Three-slot, brake holes |
| 6725, 10 Series, 3 Slot Mount Double Flange Short Standard Bearing | 10 Series | Compact 10 Series projects | Short, with three open slots |
| 8020, 6523, 15 Series, 4 Mount Double Flange Short Bearing for 3″ Extrusion | 15 Series | Braked, multi-mount on 3″ profiles | Four-slot design |
80/20 45 Series Double Flange Bearing
This 45 Series bearing is designed to ride on the 45mm side of a 45 Series aluminum extrusion. It features double flanges and brake holes for secure positioning on adjustable assemblies. Made from aluminum with self-lubricating UHMW plastics inside, it supports smooth movement in compact spaces. Best for small to mid-sized linear slides where precise stop points are needed. Caution: brake hole hardware availability may vary by kit; confirm included accessories before mounting.
LD-Teemm HGH15CA Linear Slider Bearing
Two HGH15CA square bearing blocks offer high rigidity and smooth, low-noise operation. The blocks use quality bearing steel with steel balls to reduce friction and increase durability. This set is best for CNC-like applications where higher load capacity and repeatable motion are critical. Limitation: data notes emphasize assembly quality; ensure precise alignment during installation to avoid binding.
8020 6526 15 Series Double Flange Long Bearing
Designed for longer travel on 1.5″ extrusions, this 15 Series bearing features double flanges and brake holes. It’s best for setups needing extended reach along the extrusion while maintaining alignment. Choose this if you need a stable, longer-bay bearing on a standard 1.5″ profile. Caution: ensure three-slot compatibility before mounting to avoid misfit on certain profiles.
8020 6715 10 Series Single Flange Short Bearing
This 10 Series bearing rides on the 1″ side of a 10 Series extrusion and uses UHMW plastics for low-friction movement. It’s best for compact, light-load slides with straightforward mounting. Best for small enclosures or deskside automation. Limitation: shorter length may not suit longer travel needs; verify travel requirements beforehand.
8020 6523 15 Series Short Bearing
This 15 Series bearing pairs a shorter profile with four mounting slots on a 3″ extrusion. It’s best for multi-point mounting on larger 15 Series profiles where brake holes are needed for precise stops. Consider this option when you require robust bracing on a mid-length slide. Caution: ensure the extrusion’s slot arrangement matches the bearing’s mounting pattern.
6415 10 Series Single Flange With Brake Holes
Rides on the 1″ side of a 10 Series extrusion and includes brake holes for secure positioning. It’s best for straightforward, shorter-length slides that require reliable braking options. Limitation: this option is tailored for 10 Series; ensure your extrusion matches the 1″ slot and profile before purchasing.
8020 6824 15 Series 4-Slot Long Bearing
This 15 Series bearing has a longer length and four slots, designed for 3″ T-slot extrusion. It is best for extended travel where multiple mounting points stabilize the slider. Advantage: included pads and shims facilitate alignment. Limitation: heavier than shorter variants, which may affect dynamic performance in very light setups.
Buying Guide: Key Purchase Considerations
What extrusion size do you have? Confirm the series (10, 15, or 45) and the corresponding slot layout before choosing a bearing. How much travel do you need? Longer bearings offer more stability but may add weight. Do you need brake holes? Some models include brake features for precise stops. Are you mounting multiple blocks or single supports? Multi-mount designs improve rigidity on larger assemblies. Do you require low noise and smooth motion? Look for self-lubricating UHMW plastics paired with robust steel bearings. Will you work in a compact space? Shorter blocks fit tighter enclosures better.
Frequently Asked Questions
- What is a t slot linear bearing? A bearing designed to ride within T-slot extrusions, providing linear motion along the slot while remaining securely mounted.
- Which series is best for small projects? The 10 Series or 45 Series bearings are typically more compact and suited to tight spaces.
- Do all bearings come with brake holes? Not every model includes brake holes; check the features to ensure braking capability if needed.
- Can I mix brands with my extrusion? Yes, as long as the bearing geometry matches your extrusion’s slot width and profile, but compatibility should be verified before purchase.
- What maintenance is required? Regularly inspect for wear, lubricate moving parts as recommended, and check alignment after installation to maintain smooth motion.
- How do I choose between single vs. double flange? Double flange offers increased stability and alignment control, while single flange saves space in tight layouts.
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