The Hiwin HGH25CA is a type of linear guide block (also called a carriage or slider) used in precision linear motion systems. It's part of Hiwin's HG series, which is known for high rigidity and load capacity, making it widely used in CNC machines, 3D printers, automation equipment, and industrial robots.
Here's a detailed breakdown:
🔧 General Specifications
Series: HG series
Model: HGH25CA
Rail Size: 25 mm
Type: HGH = flange type block (wide)
Accuracy Classes: N (Normal), H (High), P (Precision), SP (Super Precision), UP (Ultra Precision)
Preload Classes: Z0 (very light), Z1 (light), Z2 (medium), Z3 (heavy)
🔩 Component Meaning – 'HGH25CA'
H – HG series (standard linear guide)
G – Interchangeable type (can be replaced without re-matching with the rail)
H – Flange type block (wide mounting base)
25 – Rail width in mm
C – Normal block length (as opposed to L for long blocks)
A – Mounting from top (standard mounting type)
📐 Dimensions (HGH25CA block only)
Parameter Value (mm)
Width (W) 70
Height (H) 36
Length (L) 91.4
Mounting Hole Distance (B) 52
Mounting Hole Size M6
Rail Width 23
Dynamic Load Rating (C) ~24.9 kN
Static Load Rating (C₀) ~39.8 kN
Exact values may vary slightly by preload/accuracy class.
⚙️ Features
4-row circular arc contact for high load and moment capacity.
Self-aligning: Can absorb small misalignments between rail and block.
High rigidity due to a larger contact area.
Interchangeable versions available (same preload and accuracy).
Dust protection: Often shipped with end and bottom seals.
📦 Typical Applications
CNC milling and routing machines
3D printers and laser cutters
Robotic arms
Precision measurement systems
Automated machinery
