DLY HD Sliding Block is designed for the HD square guideway series. It is used as the moving block in a heavy-duty linear guide system, helping machines achieve stable linear motion, high rigidity, smooth sliding performance and reliable load support.
The HD sliding block series includes HDH square type blocks and HDW wide type blocks, with CA, HA, CB and HB options according to block shape, load requirement and mounting style. It is suitable for CNC machines, automation equipment, laser machines, packaging machinery, linear modules, positioning tables and heavy linear motion systems.
Main supply scope:
HDH sliding blocks, HDW sliding blocks, matched HD square guideway sets, replacement linear guide blocks, block-and-rail assemblies, standard preload options, anti-rust protection and export packaging.
HD Sliding Block Product Specifications
| Product Name | HD Sliding Block / HD Linear Guide Block / Heavy Duty Linear Guide Block |
| Matched Guideway | HD Square Guideway |
| Block Types | HDH square type, HDW wide type |
| Common Model Options | HDH-CA, HDH-HA, HDW-CA, HDW-HA, HDW-CB, HDW-HB |
| Common Sizes | 15, 20, 25, 30, 35, 45, 55, 65 |
| Motion Structure | Four-row circular-arc contact ball structure for four-direction load support |
| Mounting Style | Top fixing or bottom fixing, depending on CA/HA/CB/HB type |
| Supply Method | Block only, rail and block set, multiple blocks per rail, custom length guideway assembly |
| Typical Application | CNC machines, automation equipment, laser machines, packaging machinery, linear modules, positioning tables, heavy-duty motion systems |
HDH and HDW Sliding Block Options
The HD sliding block series is mainly divided into HDH square type blocks and HDW wide type blocks. HDH is suitable for standard square-type installation, while HDW provides a wider block body for applications that need a larger mounting surface or higher moment support.
| Model Code | Block Shape | Load Type | Mounting Style | Selection Note |
|---|---|---|---|---|
| HDH-CA | Square type | Heavy load | Top fixing | Common option for standard heavy-duty linear guide applications. |
| HDH-HA | Square type | Super heavy load | Top fixing | Suitable when higher load capacity and rigidity are required. |
| HDW-CA | Wide type | Heavy load | Top fixing | Suitable for wider mounting surface and better moment support. |
| HDW-HA | Wide type | Super heavy load | Top fixing | Used when both wide mounting and higher rigidity are required. |
| HDW-CB | Wide type | Heavy load | Bottom fixing | Selected for installation structures requiring bottom mounting. |
| HDW-HB | Wide type | Super heavy load | Bottom fixing | Suitable for wide block, high-load and bottom-fixing applications. |
Product Parameter Drawings
HDH-CA / HDH-HA square type sliding block dimension reference.
HDW-CA / HDW-HA wide type sliding block dimension reference.
HDW-CB / HDW-HB wide type bottom fixing sliding block dimension reference.
HDW Series Basic Size Reference
The following text table keeps the basic HDW series size information for quick comparison. For complete mounting and load data, please refer to the HDW parameter drawings above.
| Model | W Width | H Center Height | H Slider Height | Steel Ball | Standard Preload (N) |
|---|---|---|---|---|---|
| HDW15 | 47 | 6.5 | 19.7 | 3.175 | 1.5–2.5 |
| HDW20 | 63 | 9.75 | 25.4 | 3.969 | 2–3 |
| HDW25 | 70 | 9.9 | 30.5 | 4.765 | 1.5–2.5 |
| HDW30 | 90 | 11.5 | 36 | 5.559 | 4–6 |
| HDW35 | 100 | 13.8 | 40.5 | 6.35 | 5–7 |
| HDW45 | 120 | 17 | 51.5 | 7.935 | 13–15 |
HDH Series Basic Size Reference
The HDH series is the square type sliding block option for HD square guideways. It is commonly used when the machine requires heavy-load support with a standard block width.
| Model | W Width | H Center Height | H Slider Height | Steel Ball | Standard Preload (N) |
|---|---|---|---|---|---|
| HDH15 | 34 | 10.35 | 23.7 | 3.175 | 1.5–2.5 |
| HDH20 | 44 | 9.75 | 25.4 | 3.969 | 2–3 |
| HDH25 | 48 | 14 | 34.5 | 4.765 | 1.5–2.5 |
| HDH30 | 60 | 14.5 | 39 | 5.559 | 4–6 |
| HDH35 | 70 | 20.8 | 47.5 | 6.35 | 5–7 |
| HDH45 | 86 | 27 | 60.5 | 7.935 | 13–15 |
Key Product Features
Heavy-Duty Load Support
The HD sliding block is designed for HD square guideways and supports stable motion under heavy-load working conditions.
Four-Directional Equal Load Design
The four-row ball structure helps the block support load from radial, reverse radial and lateral directions.
HDH and HDW Options
HDH square blocks and HDW wide blocks can be selected according to installation space and load direction.
Smooth Sliding Performance
Matched block and rail sets help reduce running resistance and support stable linear motion.
Typical Applications
HD sliding blocks are used in linear motion systems where load capacity, rigidity and stable movement are important. The final model should be selected according to load direction, installation space, rail length, required precision and working environment.
CNC Machines
Used for feed axes, machining centers, milling machines, grinding machines and heavy positioning platforms.
Automation Equipment
Applied in transfer systems, loading units, gantry structures, pick-and-place equipment and production lines.
Laser Equipment
Suitable for laser cutting, laser engraving and laser marking systems requiring stable linear movement.
Packaging Machinery
Used for guiding, feeding, pushing, labeling and repeated linear motion structures.
HDH and HDW model options including HDH20, HDH25, HDH30, HDH35, HDW20, HDW25, HDW30 and HDW35.
Need help selecting an HD sliding block?
Send us your block model, rail size, rail length, quantity and application requirement. DLY can help confirm whether HDH or HDW type is more suitable for your machine.
WhatsApp: +86 166 0578 8856 | Email: dlyexport2@dlybearing.com
FAQ
Q1: What is an HD sliding block?
An HD sliding block is the moving block used with the HD square guideway. It runs along the guide rail through internal rolling elements and supports stable linear motion in heavy-duty applications.
Q2: What is the difference between HDH and HDW sliding blocks?
HDH is the square type block, while HDW is the wide type block. HDW provides a wider mounting surface and is often selected when the machine needs stronger moment support or wider installation contact.
Q3: Can I buy only the HD sliding block without the rail?
Yes. DLY can supply HD sliding blocks only. However, the block must match the existing rail size, accuracy grade, preload condition and model series. For replacement orders, photos and model markings are recommended.
Q4: How do I choose between CA, HA, CB and HB?
CA usually refers to heavy-load top fixing, HA refers to super-heavy-load top fixing, CB refers to heavy-load bottom fixing, and HB refers to super-heavy-load bottom fixing. The final choice depends on load requirement and mounting structure.
Q5: What information is needed for an HD sliding block quotation?
Please provide block model, rail size, rail length, quantity, preload, accuracy grade, installation direction and whether you need block only or a complete rail-and-block set.
Q6: How should HD sliding blocks be maintained?
Keep the guideway clean, avoid dust and metal chips entering the block, lubricate according to the working environment, and avoid removing the block from the rail without proper handling.
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