LOCAL OSRS REFERENCE

Black cog

Source revision 15227375 · Saved 2026-09-27 · Sources & credits

On this page
Black cog
Released17 June 2002 (Update)
MembersYes
Quest itemClock Tower
Properties
TradeableNo
EquipableNo
StackableNo
NoteableNo
OptionsDrop
ExamineA cog from some machinery.
Values
Value1 coin
High alch0 coins
Low alch0 coins
Weight1 kg
Respawn time100 ticks (60 seconds)
Advanced data
Item ID21
LinkMOID

The black cog is a quest item used only in Clock Tower. It is found in a burning room in the Clock Tower's basement, requiring a bucket of water in the inventory, or ice gloves or smiths gloves (i) equipped to pick up.

It is used to repair the eastern black clock spindle in the basement.

Duplicates can be acquired by picking up another one after putting the first cog on the clock spindle and before completing the quest. Once the quest is completed, the cog can not be picked up from the spawn or if the duplicate is dropped.

Spawns

Location Members Spawns Map
Clock Tower DungeonMembers1Show map

Changes

Date Changes
15 – 22 August 2006

The item was renamed from "Cog" to "Black cog".

Sources & credits

“Black cog” by Old School RuneScape Wiki contributors, revision 15227375. Text adapted under CC BY-NC-SA 3.0; adapted text is shared under the same license. Formatting and navigation changed; Wiki scripts and editing controls omitted. Game imagery © Jagex Ltd. Imported image-file descriptions retain their own credits and licensing statements.

Original source address: https://oldschool.runescape.wiki/w/Black_cog?oldid=15227375

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About this library and media credits

Game icons © Jagex Ltd, via the OSRS Wiki. Interface icons by Lucide.