Long Drill Bit Set Manufacturer,Supplier and Exporter in India
Product Code : EL-WT-12984
Jlab Export is a leading Long Drill Bit Set Manufacturer,and suppliers in India
Some holes are too deep for a standard bit: through a thick post, a stack of boards or a stud partition. These HSS bits are 12 inch long and come as a set of 10 in five diameters from 1/8 to 3/8 inch. Four of them are 1/4 inch, and there are two each of 3/16 and 5/16 inch.
Specifications
| Pieces | 10 |
| Length | 12 inch |
| Diameters | 1/8, 3/16, 1/4, 5/16 and 3/8 inch |
| Bits per size | 1 of 1/8, 2 of 3/16, 4 of 1/4, 2 of 5/16 and 1 of 3/8 inch |
| Material | HSS (high speed steel) |
| Minimum order quantity | 10 units |
| Dispatch time | Usually 4–6 working days |
| Manufacturer | JLab (Jain Laboratory Instruments Pvt Ltd), Ambala, India |
Workshop Practice with Long Drill Bits
Electrical wiring trainees take a cable through a wooden partition or a thick timber frame. They mark the hole on both faces with a Tape Measure, then drill through with a long bit in a Portable Electric Drill. A partner watches the bit from the side and calls out if it leans.
Carpentry students drill a deep hole for a long bolt through two lapped timbers clamped on the Work Bench. Teachers use the job to show why a long bit must be pulled back often to clear the chips. It also shows how the bit bends when it is forced or started at an angle.
Frequently Asked Questions
When do I need a long drill bit?
When the hole is deeper than a standard bit can reach. Typical jobs are holes through thick posts, beams and partitions, cable runs through frames and deep bolt holes in stacked timbers.
How do I keep a long bit from wandering?
Start the hole square with a short bit of the same size, then follow with the long one. Drill at a moderate speed with light, steady pressure, and check from two directions that the drill is upright.
Can the long bits drill metal?
Yes, they are HSS and cut steel, aluminium and brass. A long bit flexes more than a short one. On steel, use a low speed and cutting oil, clear the chips often and keep short bits for shallow holes.
Why does the set have more than one bit of some sizes?
The four 1/4 inch bits and the pairs of 3/16 and 5/16 inch bits give spares in the middle sizes. A broken bit can be replaced at once, and several students can drill at the same time.
Standard and Masonry Drill Bit Sets
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Last updated: 6 November 2026