helical gear

And so, he says he left prison without proper ID, just his release papers and the “dress-out gear” he was given by the state.
His First Day Out Of Jail After 40 Years: Adjusting To Life Outside|Justin Rohrlich|January 3, 2015|DAILY BEAST
We, on the other hand, on the police side, will naturally gear up to deal with any potential contingency that might occur.
After No Indictment for Eric Garner Killer, Is NYC the Next Ferguson?|Jacob Siegel|December 3, 2014|DAILY BEAST
The best thing about winter is seeing all the cute kids bundled up in their cold-weather gear.
The Daily Beast’s 2014 Holiday Gift Guide: For the Blue Ivy in Your Life|Allison McNearney|November 29, 2014|DAILY BEAST
These self-dubbed gear heads go toe to toe (or perhaps more accurately, crash to crash), with the men in the sport.
The Moms of Monster Jam Drive Trucks, Buck Macho Culture|Eliza Krigman|November 22, 2014|DAILY BEAST

Photos he would share on Facebook this year show Hauchard in Raqqa, wearing combat gear and wielding a variety of heavy weapons.
Showing the Faces of Its Murderers, ISIS Shows Its Global Reach|Tracy McNicoll|November 18, 2014|DAILY BEAST
The controlling leaders being out of gear the machine did not run smoothly: there was nothing but friction and tension.
Napoleon's Marshals|R. P. Dunn-Pattison
A piece of iron sticking out from the cross-head carried the plug-rod for working the gear-handles.
Life of Richard Trevithick, Volume II (of 2)|Francis Trevithick
The valves, gear, and nozzles were perhaps improved in detail; but the groundwork was unchanged.
Life of Richard Trevithick, Volume II (of 2)|Francis Trevithick
Two valves turned the steam on and off from under the piston, with the ordinary gear and handles.
Life of Richard Trevithick, Volume II (of 2)|Francis Trevithick
The first shot demolished the top gear of one of the ships, bringing down the men; and the other ships kept a safe distance.
King Robert the Bruce|A. F. Murison

British Dictionary definitions for helical gear

helical gear

noun

a cylindrical gearwheel having the tooth form generated on a helical path about the axis of the wheel

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012