Bat continued to dominate ball on day three of the Rothesay County Championship Division 2 match between Kent and Northamptonshire at Canterbury on Tuesday.
Saif Zaib was unbeaten on 150, Calvin Harrison hit 122 and Justin Broad was 107 not out at stumps as the visitors closed on 624-6 – a lead of 58 runs.
Earlier, Vasconcelos had made exactly 100 and Tim Robinson weighed in with 55.
It proved to be another sapping day for the bowlers but Jaydn Denly took his first red-ball wickets at the Spitfire Ground, finishing with figures of 2-107.
He said: “It was nice to get a couple of wickets, obviously, because it gets you closer to getting off the field and batting again!
“I’m buzzing. Whenever I get a wicket, it’s nice.
“Being more of a batter, it’s always a bonus to get a wicket, as well, and help out the boys.”
The temperature was already 27 degrees in the shade when Northants resumed on 140-1 and the overnight batsmen quickly reached their milestones.
Harrison, who was 41 overnight, drove Nathan Gilchrist (0-85) to reach his half-century and Vasconcelos – who had ended day two on 87 – took a single from Joey Evison (0-55) to reach three figures.
But he was out, caught behind off Wes Agar (1-82).
When it was Harrison’s turn to rack up his hundred, he did so in style, heaving Matt Parkinson (1-149) for six over mid-wicket and seeing the visitors through to 255-2 at lunch.
An apparently dead game was briefly reignited when Parkinson had Harrison caught at mid-on by Denly and James Sales was then brilliantly run out by Gilchrist and Harry Finch for 41 – Robinson narrowly avoided getting caught by Ekansh Singh at short leg but hared down the track, looking for a single that wasn’t there.
All-rounder Singh, however, couldn’t take an ankle-high chance offered by Zaib when he was on nine and Robinson eased to 50 with a single off Parkinson.
Denly claimed his maiden first-class wicket at the Spitfire Ground when he had Robinson lbw but Zaib reverse swept him for four to bring up his half-century in his next over and it was 416-5 at tea.
Spinner Denly, 19, struck again in the second over after the resumption to get Lewis McManus caught and bowled for 13, but Zaib eased to three figures.
He had reached 99 when Kent brought the field in and then swept Tawanda Muyeye (0-68) for six over square leg.
Broad drove Denly to put Northants into the lead and took a single off the same bowler to reach three figures in the 130th over.
Rain is forecast for swathes of day four but, if it stays away, the visitors might still make life awkward for Kent.
“It’s a good wicket so we have just got to keep on bowling well,” said Denly.
“Hopefully, we can get the wickets and then we can get to batting.”
