SNA 500 & 600 Series Heavy-Duty Plummer Block Housings

SNA 500 & 600 Series Heavy-Duty Plummer Block Housings

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SNA 500 & 600 Series Heavy-Duty Plummer Block Housings
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Product Description

The SNA 500 & 600 Series Bearing Housings by J&J are precision-engineered heavy-duty plummer block housings designed to deliver superior rigidity, extended service life, and reliable performance in demanding industrial applications. With an optimized reinforced structure and advanced sealing arrangements, these housings are ideal for environments involving heavy loads, vibration, dust, and elevated operating temperatures.

The housing design incorporates a broad central rib in the base cavity along with an additional strengthening rib on the cap, ensuring improved load distribution, enhanced structural stability, and long-term operational reliability.

Key Design Features

  • Robust reinforced housing construction for higher strength and durability
  • Horizontally split design for easy bearing mounting, inspection, and maintenance
  • Suitable for tapered bore bearings mounted on adapter sleeves
  • Shaft diameter range: 20 mm to 140 mm
  • Provision for Locating Ring (FRB) for axial bearing positioning when required
  • Supplied as non-locating type as standard

Lubrication System

SNA Series housings are designed for both grease and oil lubrication systems.

  • Grease nipple provided on the top of the housing for efficient relubrication
  • For W33 type bearings with annular lubrication grooves, the grease nipple is centrally positioned on the cap
  • For other bearing types, grease nipples are mounted on the housing sides with suitable dimples provided on the cap

Sealing Arrangements

To suit various industrial operating conditions, multiple sealing options are available:

  • TC Felt Seal – Felt collar with O-ring
  • TA V Seal
  • TG Double Lip Seal
  • TL Four Lip Seal
  • TS Labyrinth Seal

These heavy-duty sealing arrangements provide excellent protection against dust, moisture, contamination, and high-temperature operating conditions while supporting higher shaft speeds.

Drainage & Maintenance Features

  • Drain holes with plugs provided on both bottom pads for easy removal of contaminated grease during maintenance
  • End cover arrangements available for closed-end shaft applications
  • End cover suffix examples:
    • ATC for TC seal arrangement
    • ATS for TS seal arrangement

Material Options

To meet different load and environmental requirements, J&J offers SNA Series housings in multiple material grades:

  • Graded Cast Iron FG 220 as per IS 210
  • Cast Steel Grade 280–520 as per IS 1030
  • Spheroidal Graphite (Ductile) Iron Grade 400/15 as per IS 1865

For applications requiring higher strength than standard grey cast iron, ductile iron and cast steel housings are available, offering approximately twice the load capacity.

Foundation & Mounting Options

  • Standard housings supplied with two oval foundation slot holes
  • Optional four-slot foundation design available for severe vibration and heavy-load applications

Suffix Identification

  • MS1 – Two foundation slot holes
  • MS2 – Four foundation slot holes

For extremely demanding heavy-duty applications, SSNAD Series housings with solid ductile iron base and four foundation slots are also available.

Series & Bearing Compatibility

Available Series

  • SNA 500 Series
  • SNA 600 Series

Compatible Bearing Series

Suitable for bearings mounted with adapter sleeves, including:

  • 1200K
  • 1300K
  • 2200K
  • 2300K
  • 22200K
  • 22300K
  • 23000K Series

The SNA Series combines rugged construction, versatile sealing options, and high load capability, making it a reliable solution for heavy industrial applications across multiple sectors.

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