117mm & 112mm Core Drill Bits

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Diamond core drill bits in 117mm and 112mm for 110mm soil and drainage pipe. 117mm is a common choice, leaving room to feed the pipe through and seal it. Every 117mm and 112mm core we stock is compared below.

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DDM150 Heavy Duty Diamond Drill Marcrist Diamond Drill Marcrist DDM150-1S Diamond Core Drill 110V - Hand-Held Dry Core Drilling Machine up to 150mm
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Marcrist DDM150-1S Diamond Core Drill 110V - Hand-Held Dry Core Drilling Machine up to 150mm

Minimises repetitive strain and hard work The outstanding power-to-weight ratio of 1900 watts to 4.0 kg. Minimises repetitive strain and hard work with less than 85 dB(A) the quietest diamond drill on the market Ø 45 mm - 152 mm diamond drilling capacity in...
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Precision Drilling for Concrete, Stone & Masonry

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Buying guide

117mm & 112mm core drill bits compared

Core bit Sizes Type Length Best for
Marcrist DCU350 117mm Dry (slotted) 165mm Brick, block and soft to medium masonry
Marcrist DCU550 117mm Dry 165mm Brick and block up to Class B engineering brick
Marcrist DCU750X 117mm Dry 165mm Brick, block, concrete and stone
Marcrist PC850 117mm Dry or wet, percussion drills 165mm Brick, block and concrete from a percussion drill
Marcrist CCU850X 112mm, 117mm Dry or wet 165mm Reinforced concrete, granite and engineering brick
Marcrist CCW850X 112mm Semi-wet 350mm Reinforced concrete and natural stone with minimal water
Marcrist WCU350 112mm Wet 450mm Blockwork, brick and concrete
Marcrist WCU550 112mm Wet 450mm Natural stone and soft to medium concrete
Marcrist WCU750X 112mm Wet 450mm Reinforced concrete and natural stone
Marcrist WCU850X 112mm Wet 450mm Highly reinforced concrete and natural stone
Marcrist WF850X 112mm Wet, rig-mounted 450mm Extremely hard reinforced concrete
Marcrist PG850V 112mm, 117mm Wet - 20-30mm vitrified porcelain and outdoor ceramics

Which size for a 110mm soil pipe?

A 117mm core leaves about 3.5mm clearance each side of a 110mm pipe. 112mm is a very tight fit, while a 127mm core gives more room to seal around the pipe.

Dry or wet core?

Dry cores (DCU350, DCU550, DCU750X, PC850 and CCU850X) cut without water, so with dust extraction there is no slurry to clean up indoors. The PC850 also runs from a percussion drill. Wet cores (the WCU and WF850X ranges) need a water feed, are the usual choice for heavily reinforced concrete and are often used on a drilling rig. The CCW850X is a semi-wet core that needs only a little water.

Coring a soil pipe hole through engineering brick or reinforced concrete? Read dry vs wet core drilling for the method, and six core drilling problems for why hard brick wears cheap cores out.

Other popular sizes: 38-42mm, 52mm, 107mm, 127mm and 152mm. Or browse all diamond core drill bits and core drill sets.

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