3/8” Spirals

Caldwell’s 3/8” Spiral Balances: INSUL-TILT, SPIRO-MITE^® and Enhanced 3/8” are made for tilt and non-tilt residential and commercial windows.
Caldwell’s 3/8” Spiral Balances succeeds AAMA Class 3 and has a weight capacity of 4-80 lbs.

INSUL-TILT: Single (4 to 42 lbs) & Tandem (42 to 80 lbs)
SPIRO-MITE^®: Single (4 to 34 lbs) & Tandem (34 to 68 lbs)
Enhanced 3/8”: Single (35-42 lbs)

Product Features

• Powerful spring capacity in a slim design fits into most aluminum & PVC window designs
• AAMA Class 3, a minimum of 50% lift assistance
• Provides consistent, smooth uniform operation throughout the full travel range of the sash
• Broad, adjustable weight ranges providing:
  • Reduced inventory
  • Fine tune window performance
  • Field adjustable
• Caldwell’s Music Wire Springs offer more consistent and dependable output
• Galvanized steel tubes, providing structural strength and durability
• INSUL-TILT: Tilt, Non-Tilt or Sideload Application: carrier dependent
• Enhanced 3/8”: Heavy duty & pre-tensioned
• SPIRO-MITE^®: Non-Tilt and clip on available