Model

MGN7H

Block Type

H (Long/Extended Type) - Provides higher rigidity, stability, and slightly better load distribution than the 'C' (Standard) type due to its increased length.

Compatible Rail Width

7mm (designed to run on MGN7 linear guide rails)

Block Width (W)

Approximately 17mm

Block Length (L)

Approximately 30.8mm

Block Height (B)

Approximately 12mm (width of the bottom mounting surface, if applicable)

Overall Height (H)

Approximately 6.5mm - 8mm (block height from top to bottom)

Overall Height (with Rail)

Approximately 8mm - 10mm (when mounted on a standard MGN7 rail)

Material

Bearing Steel (most common for block body, recirculating balls, and raceways, providing high hardness and wear resistance). Stainless Steel (often available for improved corrosion resistance, e.g., SUS440C, for humid or cleanroom environments).

Internal Design

Features precision steel balls in a circulating system. Includes a steel ball holder/retainer to prevent balls from falling out when the block is removed from the rail, simplifying handling and assembly.

Load Bearing

Employs a Gothic arch or 4-point contact design, allowing it to sustain balanced loads from all directions (radial, reverse radial, and lateral). This provides good rigidity and accuracy for its size.

Dynamic Load Rating (C)

Typically 0.98 kN - 1.37 kN (approx. 100 kgf - 140 kgf). Note: Exact values vary by manufacturer; consult specific datasheet.

Static Load Rating (C0)

Typically 1.24 kN - 1.96 kN (approx. 125 kgf - 200 kgf). Note: Exact values vary by manufacturer; consult specific datasheet.

Lubrication

Often includes an oil inlet/nipple for easy lubrication. Regular lubrication is essential for smooth, low-friction movement and extending the service life of the linear guide.

Precision Grade

Commonly available in various precision grades: C (Normal), H (High), P (Precision). "Normal quality" Chinese blocks typically refer to C or H grades.

Interchangeability

Often designed for interchangeability within certain precision tolerances, meaning individual blocks and rails can be replaced separately, which is convenient for maintenance or assembly.

Movement Characteristics

Provides very smooth, precise, and quiet linear motion with minimal friction, crucial for small-scale precision applications.

Weight

Extremely lightweight, typically 10g - 20g (varies slightly by manufacturer and material)

Mounting Holes

Typically has threaded M2 holes on the top surface for attaching miniature carriages or fixtures. Standard mounting hole spacing is usually 15mm.