crankless

Lacking rotating handle

Crankless describes an engine or mechanism that operates without a crankshaft—the component that typically converts linear piston motion into rotation.

Most internal combustion engines use cranks, so crankless designs represent an engineering departure: crankless motor concepts, a crankless compressor.

The word also applies to anything simply lacking a crank handle.

mechanism

direct-drive

No transmission between motor and load

belt-drivenPowered via looped strap
chainlessHaving no restraining links
gearlessHaving no gears

pedal-assist · flywheel · transmissionless · frictionless · seamless · motorized · electric · battery-powered · propulsion · e-bike

simplified

streamlined

Made smooth and efficient

efficientProductive without waste
low-maintenanceRequiring little care
minimalistOne favoring bare essentials

uncomplicated · direct · reliable · durable · wear-resistant

obsolete

outdated

No longer in use

antiquatedOld and outdated
deprecatedFormally advised against using
supersededReplaced by something newer

replaced · modernized · upgraded · discontinued · phased-out · legacy · conventional · traditional · retrofitted · outmoded

stationary

static

Without motion or change

fixedRestored or immovable
immobileUnable to shift
ergometerDevice measuring physical output

anchored · mounted · trainer

Opposites

mechanical configuration

cranklesscranked

Turned by handle

operation method

cranklesshand-cranked

Turned by rotating lever

Family

crank, cranky, hand-crank, cranks, cranked, cranking, crankiest, crankily, crankiness

Familiarity: Top 1,000,000
Profile: Used worldwide · Timeless · Concrete · Rated G