SR20W1UU+280L

SR20W1UU+280L Low Profile Ball Type Linear Guideway
$138.45 /Each    info

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Overview

Part Number SR20W1UU+280L
Brand: LILY Brand: LILY Interchangeable With: THK

Characteristics

System of Measurement Metric
Series LM Linear Guide (Full Ball Type)
Assembly Type Low Assembly
Block Model SR20W1UU(GK)BLOCK
Block Type Square Type
Load Type Heavy Load
Rail Mounting Type Locking
Mounting Hole Size (M) M4*7
Number of blocks 1
Standard Lubrication Nipple PB1021B
Rail Model SR20-280L
Number of Rail Holes 5

Dimensions

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
Grease Nipple Length (G) 12 mm
Block Mounting hole Length (C) 32 mm
Block Length (L) 47.3 mm
Rail Length 280 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

Accuracy Classs Normal C
Preload Code ★Unmarked, Radial clearance with Preload -5~+2μm
★C1 Light Preload,Radial clearance with Preload -12~-5μm
★C0 Medium Preload,Radial clearance with Preload -17~-12μm
Basic Dynamic Rated Load (C) 13.4 kN
Basic Static Rated Load (C0) 17.2 kN
Static Rated Moment (MR) 0.135 kN-m
Static Rated Moment (MP) 0.064 kN-m
Static Rated Moment (MY) 0.0397 kN-m

Properties

Block weight 0.2 kg
Rail weight 2.1 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.

 

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