Identifying Vintage Zenith Cast Iron(CI) Tables:

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Key Visual Identifiers: Spotting a CI Base

Doctors can rely on three simple physical features to identify an original Cast Iron frame:

1. Rounded Nose Base: The front profile of the heavy cast iron frame features a distinct, smooth rounded nose.
2. Rear Base Wheels: Built with wheels at the rear of the frame for tilting maneuverability.
3. No Head Switches: CI tables have no upper Head Up, Down, or Stop switches and no key switches near the head section.

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1. Cast Iron Spring-Load Hylo (1919 – 1950s)

• Drive System: Purely mechanical design using internal high-tension counterbalance springs to balance patient weight during tilting.
• Parts Support: ❌ NO PARTS SOLD (Obsolete mechanical drive).

• Drive System: Electric motor driving an exposed cross-cut worm gear beneath the cast iron frame.
• Parts Support: ❌ NO PARTS SOLD (Obsolete exposed gear system).

• Drive System: Electric motor coupled to an enclosed hydraulic pump and cylinder system inside the CI frame. 1981 marked the final production year for the Cast Iron base.
• Parts Support: ✅ PARTS AVAILABLE (Supported for select CI hydraulic components, seal kits, and upper-structure parts).     https://zenithtable.com/search.php?search_query=Zenith+CI+   
  
  For Refurbsihed Zenith CI Hylo Table see link Below
  https://usedchiropractictable.com/search.php?search_query=Zenith+Cast+Iron+Hylo+Table+ 
  

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CI Drive Style	Production Years	Key Identifiers	Parts Availability Policy
Spring-Load	1919 – 1950s	Rounded Nose / Rear Wheels / No Head Switches	❌ No Parts Sold
Worm Gear	1940s – 1970s	Rounded Nose / Rear Wheels / No Head Switches	❌ No Parts Sold
Hydraulic	1958 – 1981	Rounded Nose / Rear Wheels / No Head Switches	✅ Parts Available (Select CI hydraulic & upper parts) https://zenithtable.com/search.php?search_query=Zenith+CI+