3R35 - Upright mortice locking latch

Application

Purpose

To provide a secure latch, operable by handle from one side or both sides, and by key from the other side or both sides, for use on wooden doors in offices and administration rooms.

Product Codes

H3R35/207/S M.L.LATCH SS O/S EX.KEYS
H3R35/207A/BS M.L.LATCH SS N/S EX.KEYS BODY ONLY
H3R35/207A/S M.L.LATCH SS N/S EX.KEYS
H3R35/208/BS M.L. LATCH BODY ONLY

Overview

The lock is primarily designed to have a handle on one side of the door only. In "latched only" state i.e. having just pushed door to, the bolt can be withdrawn by means of the handle (from inside) or by partial turn of the key (from either side). The snib (above the handle) can be used to hold the bolt in the withdrawn position. A full turn of the key in the locking direction effectively deadlocks the handle which can then only be released by a full turn in the opening direction. The 3R35 can also be used without handles on either side.


Standard Features

  • Deadlocking slide (directly above latch bolt) deadlocks the latch bolt when the latter is engaged in the locking plate and prevents springing back by whatever means (Note: Gap between locking plate and forend must not exceed 3 mm).
  • Deadlocking of handle (full turn of the key) to prevent operation of the handle from outside by breaking glass/panel etc. and reaching through.
  • 5 lever locking mechanism with 9 lifts/lever affording at least 25,000 usable differs.
  • False notching and common belly form on levers to deter reading and manipulation attacks.
  • Key thrower with curtain to restrict access to the locking mechanism and further frustrate manipulative attack.
  • Internal components designed to collapse under strong key attack leaving lock secure.
  • Steel box on locking plate to protect head of bolt from jemmy attack.
  • Edge gated levers suitable for master keying in suites compatible with other Chubb Security Range locks.
  • Snib to hold bolt in withdrawn position and prevent door from accidentally latching.

Specification

Finish

Materials and Finishes

  • Lockcase, cap, forend and locking plate : mild steel (painted)
  • Bolt head, deadlocking slide and follower : steel sinterings (nickel plated)
  • Bolt tail, runner, dogging slide, detent, thrower flange and bolt stump arm : mild steel (nickel plated)
  • Levers and thrower spindle : brass (natural finish)
  • Lever Springs:18/8 stainless steel
  • Lever spring support : Glass reinforced nylon
  • Snib follower : Mazak 3
  • Thrower retaining spring : zinc plated spring steel
  • Springs generally : stainless steel

Standards

Performance/Testing/Criteria

  • 60,000 latch withdrawals using key.
  • 240,000 latch withdrawals via follower.
  • 300,000 slams.
  • 60,000 full turns of key to deadlock and release.