Supported Linear Shaft
A Supported Linear Shaft is a hardened round shaft mounted on a continuous aluminum support base. Also described as a linear shaft with bottom support, this structure reinforces the shaft along its length and reduces deflection in longer-travel applications.
DLY supplies SBR supported linear shafts and TBR supported linear shafts in standard and custom lengths. Matching open linear bearing blocks can be supplied separately or together with the supported rail.
The continuous bottom support makes the shaft less sensitive to bending than a round shaft supported only at its ends under comparable diameter, span and load conditions. Supported shaft systems are commonly used in CNC equipment, woodworking machines, automation systems, packaging machinery and other industrial linear motion structures.
Available series: SBR and TBR
SBR shaft diameters: 10–50 mm
TBR shaft diameters: 16–30 mm
Maximum single-piece length: 4000 mm or 6000 mm, depending on model
Matching components: SBR…UU and TBR…UU open linear bearing blocks
SBR and TBR Supported Shaft Options
SBR and TBR are supported round-shaft systems with different support profiles, mounting dimensions and matching bearing blocks. They should be selected according to the required shaft diameter, machine structure, installation space and bearing-block configuration.
SBR Supported Linear Shaft
The SBR series uses a hardened round shaft fixed to an aluminum support base and operates with a matching SBR…UU open bearing block. Available shaft diameters range from 10 mm to 50 mm.
View SBR Linear Guide RailTBR Supported Linear Shaft
The TBR series is another bottom-supported round-shaft system with its own aluminum base and matching TBR…UU open bearing block. Available shaft diameters include 16, 20, 25 and 30 mm.
View TBR Linear Guide RailSBR and TBR rails and blocks are not interchangeable based only on nominal shaft diameter. The selected bearing block must match the rail series and size.
Supported Linear Shaft Specifications
| Model | Shaft Diameter (mm) | N (mm) | P (mm) | Standard Lengths (mm) | Maximum Length (mm) |
|---|---|---|---|---|---|
| SBR10 | 10 | 15 | 100 | 150, 250, 550, 850 | 4000 |
| SBR12 | 12 | 15 | 100 | 150, 250, 550, 850 | 4000 |
| SBR13 | 13 | 15 | 100 | 150, 250, 550, 850 | 4000 |
| SBR16 | 16 | 20 | 150 | 190, 340, 640, 940 | 6000 |
| SBR20 | 20 | 20 | 150 | 340, 640, 940, 1240 | 6000 |
| SBR25 | 25 | 25 | 200 | 250, 450, 850, 1250 | 6000 |
| SBR30 | 30 | 25 | 200 | 450, 850, 1250, 1450 | 6000 |
| SBR35 | 35 | 30 | 200 | 460, 660, 860, 1060 | 6000 |
| SBR40 | 40 | 30 | 200 | 460, 660, 860, 1060, 1260 | 6000 |
| SBR50 | 50 | 35 | 200 | 470, 670, 870, 1070, 1270 | 6000 |
| TBR16 | 16 | 20 | 150 | 190, 340, 640, 940 | 6000 |
| TBR20 | 20 | 20 | 150 | 340, 640, 940, 1240 | 6000 |
| TBR25 | 25 | 25 | 200 | 250, 450, 850, 1250 | 6000 |
| TBR30 | 30 | 25 | 200 | 450, 850, 1250, 1450 | 6000 |
N and P correspond to the dimensional positions shown in the applicable product drawing. Confirm the complete SBR or TBR drawing before machining the equipment mounting surface.
Standard sizes are available in commonly used lengths. Custom cutting can be confirmed according to the model, required length and order quantity. If the required length exceeds the maximum single-piece length, send DLY the installation drawing to evaluate whether a jointed arrangement is suitable.
Why Use a Supported Linear Shaft?
- Continuous shaft support: The aluminum base supports the round shaft along its length instead of only at both ends.
- Reduced deflection: The supported structure reduces bending under comparable shaft diameter, load and span conditions.
- Longer-travel suitability: The structure is suitable for motion systems where an unsupported shaft may deflect over a longer span.
- Stable mounting: The support base provides regular mounting points along the rail.
- Matching component supply: DLY can supply the supported shaft with corresponding open linear bearing blocks.
Bottom support improves the shaft structure, but final system performance still depends on shaft diameter, rail length, block quantity, block spacing, applied load, mounting direction and installation accuracy.
Supported Linear Shaft vs Standard Linear Shaft
| Item | Supported Linear Shaft | Standard Unsupported Shaft |
|---|---|---|
| Support structure | Continuous aluminum support along the shaft | Usually supported at both ends |
| Deflection | Lower under comparable conditions | More sensitive to shaft span and load |
| Bearing type | Open linear bearing or open bearing block | Usually a standard closed linear bearing |
| Mounting method | Fixed through mounting points in the support base | Usually fixed with shaft-end support blocks |
| Typical selection | Longer travel or continuously supported motion structures | Shorter spans where calculated shaft deflection is acceptable |
Supply Options
DLY can supply supported linear shafts in the following configurations:
- Supported shaft and aluminum base without bearing blocks
- One supported shaft with the required quantity of matching open bearing blocks
- Two supported shafts with bearing blocks for a parallel motion structure
- Standard lengths or custom cut lengths within the applicable manufacturing range
- OEM supply and export packaging according to the order quantity and rail length
The quotation should clearly state the rail model, length, quantity and whether matching blocks are included. Bearing blocks are not automatically included unless they are listed in the confirmed quotation.
Typical Applications
- CNC engraving machines
- Woodworking machinery
- Packaging equipment
- Automated production lines
- Pick-and-place systems
- Material transfer mechanisms
- Industrial linear motion assemblies
Application suitability should be confirmed according to load, stroke, speed, mounting direction, block arrangement and required motion accuracy.
Why Choose DLY?
- Direct manufacturing supply: DLY supplies supported linear shafts for distributors, OEM customers and industrial projects.
- SBR and TBR product range: Multiple shaft diameters and matching open bearing blocks are available.
- Standard and custom lengths: Rail length can be confirmed according to the selected model and project requirement.
- Matching support: DLY can check rail and bearing-block compatibility before quotation.
- Export order support: Packaging can be arranged according to rail length, quantity and shipping method.
- One-year warranty: DLY provides a one-year product warranty under the agreed supply terms.
FAQ
Q: Is a linear shaft with bottom support the same as a supported linear shaft?
A: Yes. A linear shaft with bottom support is commonly called a supported linear shaft or supported round shaft. It consists of a round shaft mounted on a continuous aluminum support base.
Q: Are SBR and TBR both supported linear shafts?
A: Yes. Both are bottom-supported round-shaft systems, but they use different support profiles and matching bearing blocks. View the SBR series and TBR series for their respective dimensions.
Q: Which bearing should be used with a supported linear shaft?
A: A supported shaft requires a matching open linear bearing or open bearing block because the bottom support passes through the opening in the bearing structure.
Q: Are matching bearing blocks included?
A: Bearing blocks can be supplied separately or together with the supported shaft. Confirm the required block model and quantity when requesting a quotation.
Q: Can DLY cut the supported shaft to a custom length?
A: Yes. Custom cutting is available within the applicable length range. Please provide the model, required length, mounting-hole requirement and order quantity.
Q: What information is required for a quotation?
A: Please provide the SBR or TBR model, shaft diameter, rail length, rail quantity, required bearing-block quantity, application and destination country.
Request a Supported Linear Shaft Quotation
Send DLY your required SBR or TBR model, rail length, block quantity and application details. We will confirm the compatible configuration, supply scope and quotation.
Email: dlyexport2@dlybearing.com
WhatsApp: +86 166 0578 8856
Contact DLYHot Tags: supported linear shaft, China supported linear shaft manufacturers, suppliers, factory, 30mm linear shaft, 10mm Linear Rod, Sbr Linear Guide Rail, linear motion rail guide, curved linear guide, cam roller linear guide rails
