Tapered Drill Bits

Tapered drill bits is designed to drill small hole. It is eqipped with a handheld drill rig and a tapered drilling rod while use.  This bit is made of 45CrNiMoVA alloy steel skirt and Element Six or YK05 tungsten carbide buttons. Gdrills provide various sizes and designs of tapered button bits to meet the specific demands of different drilling projects.

Gdrills supplies tapered button bits for compatible top hammer rock drilling systems, particularly hand-held pneumatic rock drills used in shallow-hole drilling applications. These bits are commonly used in mining development, quarrying, construction, and small-hole drilling where the equipment is designed for a tapered drill steel system.

The tapered connection allows the bit to be fitted to a matching tapered drill rod. Correct selection depends on the taper angle, rod dimensions, required hole diameter, and the configuration of the existing drilling equipment. Matching these specifications is essential for proper fit and reliable drilling performance.

Gdrills offers different bit diameters and button configurations for selected tapered systems. Depending on the model, options may include different carbide button arrangements and flushing-hole configurations to suit the requirements of the drilling application.

Product Selection Information

Application: Compatible top hammer and hand-held rock drilling systems

Rod Sizes: 22 mm and 25 mm hexagonal rod configurations

Taper Angles: 7°, 11°, and 12°

Configuration Options: Different bit diameters, button arrangements, and flushing-hole designs, subject to model availability

Selecting a tapered button bit involves more than choosing the required hole diameter. The taper connection must match the drill steel, while the bit diameter, button configuration, and flushing arrangement should suit the drilling application.

1. Confirm the Taper Angle

The taper angle is a critical connection specification. The bit and drill rod must have compatible taper geometry to achieve the intended fit. Do not select a replacement bit based on diameter alone.

2. Check the Drill Rod Dimensions

Confirm the hexagonal rod size and the corresponding drill steel specification. The rod dimensions and taper angle should be checked together against the existing drilling equipment.

3. Select the Required Bit Diameter

The bit diameter should be determined by the required hole size and drilling plan. Before ordering, confirm that the selected diameter is available for the required rod size and taper angle.

4. Review the Button Configuration

Button arrangement and geometry influence how the bit interacts with the rock. The appropriate configuration depends on the rock formation, abrasiveness, drilling parameters, and required drilling performance.

5. Check the Flushing-Hole Arrangement

The flushing-hole configuration should be suitable for the selected bit design and the drilling system. Confirm the actual number and position of flushing holes for the required model.

6. Verify the Complete Specification Before Ordering

If you are replacing an existing bit, provide the part number, a clear product photo, or a technical drawing whenever possible. Confirm the rod size, taper angle, bit diameter, and relevant dimensions before placing an order.

11° Tapered Button Bit- For 22 mm (7⁄8") hex. rod

Pic	Article No.	Dia		Button		Flushing Hole		Angle (°)	Weight(kg)
		mm	inch	Front	Guage	Front	Gauge
	TBB2211-32-522	32	1 1/4	2 X 7	5 X 7	1	2	35	0.23
	TBB2211-34-522	34	1 11/32	2 X 7	5 X 7	1	2	35	0.31
	TBB2211-36-522	36	1 13/32	2 X 7	5 X 8	1	2	35	0.38
	TBB2211-38-522	38	1 1/2	2 X 7	5 X 9	1	2	35	0.41
	TBB2211-40-522	40	1 5/8	2 X 8	5 X 9	1	2	35	0.46
	TBB2211-32-622	32	1 1/4	2 X 7	6 X 7	2	1	35	0.23
	TBB2211-33-622	33	1 5/16	2 X 7	6 X 7	2	1	35	0.31

12°Tapered Button Bit- For 22 mm (7⁄8") hex. rod

Pic	Article No.	Dia		Button		Flushing Hole		Angle (°)	Weight(kg)
		mm	inch	Front	Guage	Front	Gauge
	TBB2212-32-522	32	1 1/4	2 X 7	5 X 7	1	2	35	0.31
	TBB2212-35-522	35	1 3/8	2 X 7	5 X 8	1	2	35	0.38
	TBB2212-38-522	38	1 1/2	2 X 7	5 X 9	1	2	35	0.41
	TBB2212-32-521	32	1 1/4	2 X 7	5 X 7	1	1	35	0.31
	TBB2212-33-521	33	1 1/4	2 X 7	5 X 7	1	1	35	0.36
	TBB2212-35-521	35	1 3/8	2 X 7	5 X 8	1	1	35	0.38
	TBB22 12-38-521	38	1 1/2	2 X 7	5 X 9	1	1	35	0.41
	TBB2212-32-622	32	1 1/4	2 X 7	6 X 7	2	1	35	0.31
	TBB2212-33-622	33	1 1/4	2 X 7	6 X 7	2	1	35	0.36
	TBB2212-35-622	35	1 3/8	2 X 7	6 X 8	2	1	35	0.38
	TBB2212-38-622	38	1 1/2	2 X 7	6 X 8	2	1	35	0.41
	TBB2212-40-622	40	1 3/5	2 X 8	6 X 8	2	1	35	0.41

7°Tapered Button Bit- For 25 mm (1") hex. rod

A tapered button bit must match the drill steel and drilling equipment for which it is intended. A similar appearance or identical nominal bit diameter does not guarantee compatibility.

Before ordering, please confirm the following details:

Rock drill model: Manufacturer and model of the hand-held or other compatible rock drill.

Drill rod size: Hexagonal rod dimensions and relevant drill steel specification.

Taper angle: The required taper angle for the existing rod and bit connection.

Bit diameter: The target hole diameter for your drilling operation.

Current bit details: Existing part number, product photo, or technical drawing, if available.

Application: Mining, quarrying, construction, or another drilling application.

Order requirements: Quantity and delivery destination.

Gdrills can review the information you provide and clarify the available product configurations before quotation. Final compatibility should be confirmed against the relevant technical

Replacing an Existing Tapered Bit? Send us your current bit details to help identify the required specification.

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