The Blades stretched the unbeaten home Championship run to ten games without a defeat to end Neil Warnock's winning start as Queens Park Rangers manager.
Richard Cresswell continued his hoodoo over Rangers - scoring his fourth goal in as many games against them in less than three months!
Adel Taarabt grabbed the leveller for Rangers but the final whistle confirmed that the Hoops had failed to beat the Blades in four meetings this season.
Boss Blackwell was forced into four changes, Evans, Ward and Williamson all picked up injuries at Peterborough in midweek and Bartley was unwell. In came Yeates, Camara, Quinn and Seip. Free from his three-match suspension, Henderson was amongst just six substitutes named.
Winning an innocuous corner in the opening minute gave QPR the early momentum and Taarabt was involved in most of their offensive scheming after winning the header from the first set-piece. On six minutes Taarabt's low cross had too much power for Simpson and then the loanee from Tottenham found himself in the clear from Ephraim's pass on nine minutes but Bunn raced off his line to make a smothering save.
Quinn and Yeates were trying to inject a bit of tempo into United's early moves and the
latter's pull-back, on 10 minutes, was ideal for Camara but his shot from 15 yards flew just over Ikeme's crossbar.
The post came to United's rescue on 19 minutes when Ephraim's cross hit the woodwork and the evaded Simpson on its way back into open play, whilst at the other end, there was no decisions for Cresswell when he was bundled over by Stewart and Ikeme in separate incidents.
Long-range efforts from Stewart and Montgomery failed to break the deadlock and Bunn spared the blushes of team-mate Nosworthy when the defender was caught in possession close to the halfway line. Following a quick break down the left channel, the Blades goalkeeper made an impressive block from Ephraim.
The importance of Bunn's save was emphasised moments later when United grabbed the lead on 44 minutes. QPR had half-cleared a corner but the ball was returned to Yeates, who went around the outside of his marker and clipped in a cross that was just behind CRESSWELL but the striker used his experience to head into the top corner, despite Ikeme getting a hand to the ball.
There was still time for Bunn to make another save, this time from Simpson, whilst QPR also won two corners before the half-time whistle arrived.
The Blades began the second half well and came within inches of doubling the lead but neither Camara nor Cresswell could add a vital touch to an inswinging Yeates free-kick and moments later Rangers capitalised on the let off by levelling the scores.
With 49 minutes gone a hopeful clearance was allowed to bounce and after Morgan and Seip were beaten - and Nosworthy was not in a position to cover - TAARABT raced clear to finally beat Bunn.
Morgan was the first to have his name taken by referee Bates, for a foul on Taarabt, who, from the resulting free-kick, forced Bunn into an acrobatic save, the goalkeeper swiftly edging to his right to tip over the crossbar.
Bunn saved again from Taarabt, the visiting side's biggest threat, and manager Blackwell displayed his ambition to win the game at the midway point with his first substitute, adding a striker in place of a midfielder. Henderson's presence won two free-kicks within minutes of being introduced.
There was nervous tension around the ground as the game entered the final ten minutes and Camara went close to winning it when he cut in from the left, but his shot was just wide of Ikeme's left post. Little was brought on and Nosworthy's shot was blocked as the Blades continued the search for the winner.
Unitedites were on their feet in anticipation on 88 minutes when Montgomery robbed Connolly in the middle of the park and set free Cresswell down the left. The scorer's cross looked ideal but, hampered by the presence of Hill, Henderson failed to make a connection at the back post.
Three minutes of added time at the end of the 90 gave United more hope - the home side looked the more likely team to snatch a winner - but neither goalkeeper was severely tested late on.
Blades: Bunn, Montgomery, Morgan, Nosworthy, Yeates (Little 85), Harper (Henderson 68), Cresswell, Stewart, Seip, Quinn, Camara.
Unused: Bennett, Taylor, Fortune, Lowton.
QPR: Ikeme, Stewart, Leigertwood, Gorkss, Connolly, Faurlin, Hill, Simpson, Ephraim (Cook 90), Priskin, Taarabt (Buzsaky 87).
Unused: Ramage, Vine, Balanta, Cerny, Borrowdale.












