Name: T73-130mm/R38-76mm Self Drilling Anchor Bolt Drill Bit
Brand: KSQ Technologies (Beijing) Co. Ltd
SKU: T73-130mm/R38-76mm
Price: 508.50 USD
Availability: InStock

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T73-130mm/R38-76mm Self Drilling Anchor Bolt Drill Bit

Product Details:

Place of Origin:	CHINA
Brand Name:	MIROC
Certification:	ISO
Model Number:	T73-130mm/R38-76mm

Payment & Shipping Terms:

Minimum Order Quantity:	1
Delivery Time:	20-30
Supply Ability:	3000

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Detailed Product Description

Material:	High Strength Alloy Steel	Diameter(mm):	42/51//76/90/100/110/115/130/150/160/180/200
Thread:	Left/Right	Specification:	R25/R32/R38/R51/T30/T40/T53/T76/T103
Surface Treatment:	Hot-Dip Galvanized	Item:	Self Drilling Anchor Bar
Highlight:	self drilling anchor bolt bit , T73-130mm rock drill bit , R38-76mm anchor bolt drill

T73-130mm/R38-76mm Self Drilling Anchor Bolt Drill Bit

Product Description

Self drilling anchors can overcome the problems of difficult to drill holes in loose and broken soil. It can realize stabilization of side slope.

The T73 self-propelled bolt can be connected with a grouting machine for grouting while drilling to achieve the anchoring effect. The construction efficiency is higher than that of ordinary hollow bolts, and it is suitable for broken and difficult-to-form surrounding rock.
There is no need for casing wall protection during construction, which can greatly improve the construction efficiency, shorten the construction period and reduce the overall cost of the project.
The hollow bolt body can be arbitrarily cut and lengthened by connecting sleeves. Therefore, the self-propelled bolt can also be constructed in the narrow space where large equipment cannot enter.
Compared with the conventional drill pipe, the T73 self-propelled bolts is equipped with a variety of drill bits, which can be selected according to the properties of different rock layers and soil during construction, which can improve the drilling efficiency.

Features

It adopts superior self drilling hollow anchor bolt, overall bolt has strong strength.
Application range is broad
Convenient for operation.

Hollow Anchor Bar

Size	Outer Dia. (mm)	Inner Dia. (mm)	Ultimate Load (kN)	Yield Load (kN)	Weight (Kg/m)
SET73/53	73	53	1160	970	13.20
SET73/45	73	45	1582	1270	17.80
SET73/40	73	40	1865	1430	21.20

Coupler

Size	Outer Dia. (mm)	Length (mm)	Weight (Kg/pc)	Note
SST73	89	235	3.82	With sealing structure
	95	245	5.70

Spherical Collar Nut

Size	Key Size (mm)	Length (mm)	Weight (Kg/pc)
SET73	95	70	1.90

Flat Plate

Size	Dimensions (mm)	Thickness (mm)	Hole Dia. (mm)	Weight (Kg/pc)
SST73	175×175	34	80	6.85
	250×250	40	80	18.00

Centralizer

Size	Outer Dia. (mm)	Length (mm)	Weight (Kg/pc)
SET73	130	65	1.08

Drill Bit

Size	Outer Dia. (mm)	Weight (Kg/pc)	Application Range (Advice)
EX			Sand, fills, gravel
SST73/130	130	4.00
SST73/175	175	6.80
EXX			Softer sedimentary rocks such as marls, mudstones, siltstone
SST73/130	130	4.00
Clay Bit			Clay, soft soil, marls, loose sand or gravel
SST73/150	150	4.00
SST73/200	200	5.60
SST73/250	250	6.75
SST73/280	280	7.60
SST73/175	175	5.20
ESS-F			Weathered rock, stone walls, rubble
SST73/130	130	4.70

1. Drilling preparation

The drilling angle, length, mix ratio of slurry, and selection of drill bits should be determined according to the rock formation. Most tunnel advance support will use 51, 76 self-propelled bolts. Adjust the drilling angle of the rock drill according to the terrain and geological conditions.

2. Drilling and grouting

When the Self-Drilling Anchor bolts is long and needs to be spliced, the drill bit should be put on the front end of the first section of the anchor rod, and the tail end of the rod body should be connected to the grouting machine through the rotary grouting adapter. When drilling, grouting is carried out, and the slurry is pressed into the hole and into the cracks of the rock mass to consolidate the rock mass and stay in the deep stable rock mass, and bond together with the stable layer as the slurry solidifies.

3. Anchor rod connection length

When there is 30cm left in the first section of the anchor rod, stop drilling, put a connecting sleeve with artificial lubricant on the tail of the previous section of the anchor rod, and then connect the second section of the anchor rod, and so on, until the drilling reaches Design length. At the end of the drilling, the anchor rod is exposed at least 10cm, which is convenient for installing the arched backing plate and the ball nut.

4. Pull test

After the construction of the self-propelled bolt, the pull-out force value test of the bolt should be carried out to check whether it meets the design value of pull-out force. For every 300 bolts in the operation area, no less than 3 bolts should be randomly checked for pull-out force test to ensure that the construction effect meets the expected requirements. The above is the answer to the question of how to support the tunnel crossing the pebble layer. The quality of the support affects the safety of the tunnel construction. It is necessary to adopt supporting materials with rich successful supporting cases and rich construction case verification.

The Self-Drilling Anchor bolts produced by KSQ have many tunnel application cases, and can provide customers with a complete set of solutions. You are welcome to inquire.