Whitco CYL4 Lockable Chainwinder

CYL4 Push to Lock Chainwinder
CYL4 Push to Lock Chainwinder
CYL4 Push to Lock Chainwinder
CYL4 Push to Lock Chainwinder

Chain type operator provides CYL4® locking for awning windows. Suitable for aluminium or timber awning windows with butt or hook hinges or non friction stays.

Available Keyed Alike for one key convenience with all door and window locks that use a 5 pin C4 key.

Features of the CYL4® Push to Lock Chainwinder

  • CYL4® One Key Security - Can be matched to most door locks for one key convenience
  • Suits aluminium or timber awning windows with butt or hook hinges, or non friction stays
  • Smooth operation
  • Through flyscreen operation
  • Push button to lock, key to unlock
  • Less than 1 mm between locking points
  • Maximum opening 300 mm, 19 handle turns to fully open
  • Can be wound closed when locked
  • Retrofits existing MK7 and MK8 Whitco chainwinder models
  • Foldable knob in handle reduces width preventing damage and interference with blinds
  • Zinc diecast body and mechanism, Passivated Zinc steel base plate and Passivated Zinc steel chain
  • Corrosion resistant version available with stainless steel chain and stainless steel base plate
  • Retail pack has printed instructions on sealed poly bag, opening restriction clip, standard and one-way fixing screws and sash security fixing brackets
  • Exceeds the requirements of Australian window lock standard AS4145.3 - 2001 level DW2SW2K1
  • The chain can be restricted to either 100mm or 150mm opening length via fitment of a restrictor clip to the chain. The fitment of the restrictor clip assists the window to comply with Building Code Australia requirements D2.24 Protection of Operable Windows
  • Available in retail and trade packs


CYL4 One Key Security

Use one key for all door and window locks.  It’s that easy! 


ASSA ABLOY’s patented CYL4® technology allows door and window locks to be keyed alike and operated by just one C4 door key.

Entrance doors, laundry doors, patio doors, patio bolts, window locks, screen doors and even padlocks for sheds and gates will all work with one key, providing customers with a convenient home locking solution.

CYL4® is a patented innovation that allows ASSA ABLOY window locks and patio bolts to be keyed to door locks that use the most common key type (C4), thus providing customers with the added convenience of having to use only one key around the home.

The ASSA ABLOY Key Gauge, provided in the CYL4® Keying Kit, allows fast and accurate determination of the key code.
The patented CYL4® cylinder has been designed to retain its wafers when the key is removed. This makes re-keying the CYL4™ cylinder quick and easy for retailers and locksmiths alike.
There are 10 CYL4® wafers numbered 0-9, that cover the 10 depths of a C4 key. Six wafers are arranged in pairs to match the first 3 cuts of the customer’s key.
Using the CYL4® Keying Kit, you can re-key any ASSA ABLOY CYL4® window lock or patio bolt to the customer’s C4 key in just a few minutes. EASY!


Most Australian door locks are operated by a C4 key. Traditional window locks are incompatible with a C4 key. Therefore home owners are required to carry at least one key for their door locks, and a different key (or keys) for their window locks.

The introduction of ASSA ABLOY’s unique CYL4® technology has revolutionised home locking security. Our new high security window lock and patio bolt ranges incorporate the patented CYL4® cylinder which is quickly and easily keyed alike to your customer’s 5 pin C4 door key.  



  • CYL4® cylinder - Can be Keyed Alike to all door locks that use a 5 pin key with a C4 profile, and to CYL4® window locks
  • Two Whitco keys included

For fixing to

  • Timber
  • Aluminium




Window size guidelines
Maximum weight of sash 15 kg with 300 mm opening. Contact customer service for more information.

Recommended maximum sash width of 900mm to ensure adequate weather sealing of the window system.

Minimal effect to full exposure to 96 hours Neutral Salt Spray mounted on powder coated Aluminium sill section.

Trade Pack

Cyl4 Push to Lock, Mild Steel Chain

Description Part Number Barcode
Silver W380211C4 9311847952690
Brown W380213C4 9311847952706
White W380216C4 9311847952713
Black W380217C4 9311847952720
Primrose W380219C4 9311847952737
White Birch W380241C4 9311847952744


Cyl4 Push to Lock, Stainless Steel Chain

Description Part Number Barcode
Silver W380311C4 9311847955745
Brown W380313C4 9311847955752
White W380316C4 9311847955769
Black W380317C4 9311847955776
Primrose W380319C4 9311847955783
White Birch W380341C4 9311847956131


Chainwinder Accessories


Handle with Foldable Knob

Description Part Number Barcode
Black W342417 9311847773370
Low Profile Knob Assembly (Pack of 50) W342317 9311847758643


Chainwinder Bracket

Description Part Number Barcode
Front Fix, White W351316 9310584316109
Front Fix, Black W351317 9310584316116
Boral, White W351516 9310584004099
Boral, Black W351517 9310584004105
Alcan, Silver W351611 9310584004112
Alcan, Black W351617 9310584004143
Airlite, White W352016 9310584317694
Airlite, Black W352017 9310584317700


Restriction Clip

Description Part Number Barcode
MK8 Chainwinder Restriction Clip Pk = 10 W341010 9310584320939


Standard Powder Coat Finishes

Silver 11 Silver 11
Brown 13 Brown 13
White 16 White 16
Black 17 Black 17
Primrose 19 Primrose 19
Magnolia 24 Magnolia 24
Stone Beige 28 Stone Beige 28
White Birch 41 White Birch 41


*Note: CYL4® Cylinder Chainwinders are not available in Bright Gold, Satin Chrome or Bright Chrome finish.

Non Standard Finishes
Other polyester powder coat finishes available on application.