NS20820ALC1PCZ
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Overview |
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| Part Number | NS20820ALC1PCZ |
Brand: LILY ![]() |
Interchangeable With: NSK |
Characteristics |
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| System of Measurement | Metric |
| Series | Low Profile Ball Type Linear Guideway |
| Assembly Type | Low Assembly |
| Block Model | NAS20ALZ |
| Block Type | Square Type |
| Load Type | Heavy Load |
| Rail Mounting Type | Locking |
| Mounting Hole Size (M) | M5*7 |
| Number of blocks | 1 |
| Standard Lubrication Nipple | M6*0.75 |
| Rail Model | N1S20820LCNPCZ |
| Rail Fixing Bolt Hole (mm) | M5 |
| Number of Rail Holes | 14 |
Dimensions |
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| Size | 20 mm |
| Assembly Height (H) | 28 mm |
| Distance from Block Bottom to Rail Bottom (H1) | 6 mm |
| Distance from Both Sides of Rail to Both Sides of Block (N) | 11 mm |
| Block Width (W) | 42 mm |
| Block Mounting hole Width (B) | 32 mm |
| Distance from Mounting Hole Center to Block Edge (B1) | 5 mm |
| Grease Nipple Length (G) | 11 mm |
| Block Mounting hole Length (C) | 32 mm |
| Block Length (L) | 65.2 mm |
| Rail Length | 820 mm |
| Rail Width (WR) | 20 mm |
| Rail Height (HR) | 15.5 mm |
| Outer Diameter (D) | 9.5 mm |
| Hole Depth (h) | 8.5 mm |
| Inner Diameter (d) | 6 mm |
| Pitch (P) | 60 mm |
| End Distance (E) | 20/20 mm |
Performance |
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| Accuracy Classs | Normal C |
| Preload Code | ★ZT: Slight Clearance -4 ~ 15 μm ★ZZ: Light Preload -4 ~ 0 μm ★ZH: Medium Preload -7 ~ -3 μm |
| Basic Dynamic Rated Load (C) | 12.4 kN |
| Basic Static Rated Load (C0) | 23.5 kN |
| Static Rated Moment (MR) | 0.16 kN-m |
| Static Rated Moment (MP) | 0.133 kN-m |
| Static Rated Moment (MY) | 0.111 kN-m |
Properties |
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| Block weight | 0.28 kg |
| Rail weight | 2.3 kg/m |
The Heavy Low Profile Ball Type Linear Guideway features a Square Type block, characterized by its symmetrical, cube-like profile that delivers exceptional rigidity and the ability to withstand high loads from multiple directions — including radial, reverse, and lateral forces. Despite its low-profile design that offers a reduced overall height for space-constrained installations, the Square Type block maintains outstanding structural stability and precision linear motion, making it the ideal choice for heavy-duty industrial applications such as CNC machining centers and gantry systems where a compact footprint and high performance are both required.
The Heavy Low Profile Ball Type Linear Guideway is designed for Heavy Load applications, capable of withstanding exceptionally high radial, lateral, and reverse loads simultaneously. Despite its low-profile design that offers a reduced overall height for space-constrained installations, its robust construction and precision ball recirculation system ensure smooth, reliable linear motion even under demanding load conditions, making it the ideal choice for heavy-duty industrial environments such as CNC machining centers, large gantry systems, and heavy press machines where both a compact form factor and high load capacity are essential.
What advantages does the Square Type block offer in space-constrained installations?
The Square Type block is particularly advantageous in space-constrained installations due to its compact, symmetric bolt-pattern footprint. When combined with the low-profile design of the guideway, the Square Type block allows the entire linear motion system to be integrated into machines or structures with very limited vertical clearance, without sacrificing load capacity or rigidity. The mounting bolts on a Square Type block are positioned on the top or side faces, offering flexible installation orientations — horizontal, vertical, or inverted — which gives engineers greater freedom in machine design when working within tight spatial constraints. This combination of compactness and versatility makes the Square Type block an excellent choice for modern machine tool designs where minimizing the overall machine footprint is a key engineering objective.
What are the typical applications that require a Heavy Load rated Low Profile Ball Type Linear Guideway?
Heavy Load rated Low Profile Ball Type Linear Guideways are deployed in applications that simultaneously demand high load capacity and a reduced installation height — a combination that conventional full-height guideways cannot provide. Typical applications include compact CNC machining centers where the machine structure has limited vertical clearance between the guideway mounting surface and the moving components, yet must withstand substantial cutting forces during heavy milling or boring operations; low-profile hydraulic and pneumatic press machines where the slide system must support large compressive loads within a restricted vertical envelope; flat-bed laser and plasma cutting machines where heavy steel plate workpieces exert significant loads on the guideway while the overall machine height must remain low for ease of material handling; compact automated stamping and forming lines where high cyclic loads are applied repeatedly within a space-constrained production environment; and precision coordinate measuring machines with low-profile slide systems where heavy workpieces must be supported and moved with exceptional accuracy. In all these cases, the Heavy Load rated Low Profile guideway provides the only viable solution that satisfies both the spatial and load performance requirements simultaneously.




