Shell Boring Bits for mortises Set Manufacturer,Supplier and Exporter in India
Product Code : EL-MWLE-9305
Jlab Export is a leading Shell Boring Bits for mortises Set Manufacturer,and suppliers in India
These shell boring bits are made for boring the holes when a mortise is cut in timber. A row of bored holes takes out most of the waste, and the walls and ends are then pared square with a chisel. The bits have a 19 mm diameter and an overall length of 450 mm.
Specifications
| Use | Boring holes for mortises |
| Diameter | 19 mm |
| Overall length | 450 mm |
| Minimum order quantity | 10 units |
| Dispatch time | Usually 4–6 working days |
| Manufacturer | JLab (Jain Laboratory Instruments Pvt Ltd), Ambala, India |
Mortise and Tenon Workshop Practice
The mortise and tenon is often the first frame joint carpentry students cut. They mark the mortise on both faces and square the ends across with a Square. Then they bore a line of holes close together inside the marks, keeping the bit upright. The waste left between the holes is chopped out with Mortise Chisels struck with a Wood Hammer.
Students check that the depth is even by pushing a rule into each hole, and pare the cheeks flat to the lines. The tenon is then fitted, and its shoulders are trimmed with a Shoulder Plane until the joint closes tight.
Frequently Asked Questions
What is a shell boring bit?
It is a boring bit with a hollow, half-round body that cuts a round hole and collects the shavings in its hollow. These bits are made for boring the holes that start a mortise, and the waste between the holes is cleared with a chisel.
Why bore holes before chopping a mortise?
Boring removes most of the waste quickly and with little force. The chisel then only has to cut the thin ribs between the holes and pare the walls, which puts less strain on the work and the bench.
How do I keep the holes straight?
Stand a square on the face of the work next to the bit, or ask a partner to sight it from the side. Check it from two directions during the first few turns, because a hole that starts at an angle stays that way.
How deep should the holes go?
Bore a little deeper than the tenon is long, so the end of the tenon never bottoms out before the shoulders close. Mark the depth on the bit with a strip of tape and check each hole with a rule.
What mortise width suits a 19 mm bit?
The bit bores holes 19 mm across, so it suits a mortise of that width. The set of Mortise Chisels includes a 19 mm chisel, which matches the bored holes when the walls are pared to the lines.
Other Mortising and Boring Tools
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Last updated: 5 November 2026
