Killing Machine (also known as Hell Bent for Leather) is the fifth studio album by British heavy metal band Judas Priest. With its release in October 1978, the album pushed the band towards a more commercial style; however, it still contained the dark lyrical themes of their previous albums. At about the same time, the band members adopted their now-famous "leather-and-studs" image.
Killing Machine was retitled Hell Bent for Leather for its U.S. release, because the U.S. branch of Columbia/CBS did not like the "murderous implications" of the album title (both titles are also names of songs on the album), with "The Green Manalishi (With the Two-Pronged Crown)" an early Fleetwood Mac cover, being added to the recording.
With Killing Machine, Judas Priest began moving to a more mainstream, radio-friendly format as the songs on the album had greater accessibility and sporting fewer underlying messages than on Stained Class, Sin After Sin and Sad Wings of Destiny. Tracks such as "Burnin' Up" and "Evil Fantasies" are replete with S&M themes while "Running Wild" is about late-night partying and "Before the Dawn" a depressing ballad. "Hell Bent for Leather" reflected their newly adopted leather costumes as well as Rob Halford's soon-to-be-trademark entrances on stage in a Harley-Davidson motorcycle. The single "Take on the World" was an attempt at producing a stadium shoutalong tune in the mould of Queen's "We Will Rock You", and was also covered by New Wave band The Human League on their 1980 tour. If the lyrics were simplified a bit from the band's previous albums and adapted more into mainstream arena rock, the instruments retained their characteristic aggressiveness and elements of blues influence returned on some songs. The album is certified gold by the RIAA.
The album was remastered in 2001, with two bonus tracks added (three in the UK). The bonus track "Fight for Your Life" was the "original" version of Judas Priest's "Rock Hard Ride Free" from their Defenders of the Faith album. "The Green Manalishi (With the Two-Pronged Crown)" is considered a bonus track on the UK remaster, but a regular track on the U.S. version.
In 2010, audiophile label Audio Fidelity released a limited-edition 24-karat gold CD of Hell Bent for Leather. Mastering was done by Steve Hoffman. This does not contain the bonus tracks from the 2001 edition.
This is the first Judas Priest album where Glenn Tipton incorporated the guitar technique of tapping into his soloing style. This is also the final album for drummer Les Binks who had joined the band in late 1977 for the recording of Stained Class; he is credited with helping develop the traditional Priest percussive sound.