Sprocket is the name of two fictional characters in the Transformers series. The original Sprocket is an Action Master Autobot introduced in 1990 and is sometimes depicted as a member of the Autobot Elite Guard Stealth Team. The second Sprocket is his evil counterpart from another dimension who is the camera operator for the Autobot reporter Rook.
Transformers: Generation 1
Sprocket is an Autobot Action Master. He is the brother of Rumbler.
Sprocket is programmed to take fast, forceful action and no prisoners. This fierce warrior doesn't withdraw from a battlefield until he's covered it with the smoking wreckage of Decepticons. He drives a rebuilt, all-terrain Attack Cruiser which has the standard supply of two photon rifles, metal-immobilizing magnetic rockets, and bumper energy shields. The Attack Cruiser converts into a vector-thrust hovercopter, armed with front-moounted plasma-pulse machine guns.
Although Sprocket wasn't introduced until after the US Transformers animated series was canceled, he did appear in animated for in the toy commercials.
Although Sprocket did not appear in any fiction by Dreamwave Productions, he did get a one page biography in their More Than Meets The Eye series.
Sprocket had a biography printed in issue #41 of the Transformers Collectors Club magazine. This biogrpahy describes him before he became an Action Master, this having an alternate mode, and being a member of the Autobot Elite Guard Stealth Team. It also describes an accident that fried his processor making him unstable.
Sprocket appeared in "A Team Effort" by Fun Publications.
When most of the members of the Autobot Elite Guard, including Sprocket, confronted Bruticus they were nearly wiped out, with Bruticus killing most of the Guard. Dion was able to blind Bruticus, forcing it to seperate into the Combaticons, but the Combaticons finished off most of the remaining Guard, including Metalhawk, who was killed by Onslaught. This seemingly left only Dion alive, burried in the rubble, and Thunderclash's team, which was off planet at the time. 
Sprocket returns in "Battle Lines", where it is revealed that he and several other Elite Guard survived the attack by Bruticus. He arrives in time to help Magnum's team against the Decepticon forces of Deathsaurus.  Sprocket is among the Autobots present when Megatron attacks Iacon with his new weapon, Devastator.
- Generation 1 Action Master Sprocket (1990)
- A new mold, he was recolored into Rumbler.
This version of Sprocket is a mirror-universe countepart of the Generation 1 character. He is a cameramech who once worked for Rook.
In Around Cybertron Part 4, Rook has his field reporter Punch make up a story on a group of Autobots meeting with the Decepticons. Sprocket worked the camera.
- Jesse Wittenrich & Pete Sinclair (w), Dan Khanna (p), Josh Warner (i), Thomas Deer (col), Jesse Wittenrich (let), Pete Sinclair (ed). "The Coming Storm: Part 6" The Transformers Collectors Club 36 (Dec/Jan 2011), Fun Publications
- Pete Sinclair & Jesse Wittenrich (August/September 2011). "Battle Lines Part 4". Transformers Collectors Club Magazine 1 (40): 9–14.
- Pete Sinclair & Jesse Wittenrich (October/November 2011). "Battle Lines Part 5". Transformers Collectors Club Magazine 1 (41): 10-15.