• Model NO.：76mm Symmetric
• Ring Bit O.D：90mm
• Pilot Bit. O.D：59mm
• Thread Type：R32,R38,T38 Thread
• Transport Package：Wood Package
• Specification：SGS, CE, ISO9001
• Trademark：PRODRILL
• Origin：China
• HS Code：84314320
• Production Capacity：10000pec,Months

Permanent/Top hammer 
Symmetrix overburden drilling systemCode No.Casing O.D.Wall thicknessRing bit I.D.Ring bit O.D.Polit bit O.D.ThreadmminchmminchmminchmminchmminchRoBit-SOD 89893 1/2''40.157712.795993.898803.15T38RoBit-SOD 76763''80.315471.85903.543592.323T38RoBit-SOD 89893 1/2''80.31550.8294.93.736702.756T38RoBit-SOD 101101.64''100.394652.5591104.331793.11T38RoBit-SOD 1141144 1/2''100.39473.52.894120.34.73692.53.642T38RoBit-SOD 1401405 1/2''100.394943.701145.75.736117.54.626T45RoBit-SOD 1681686 5/8''100.3941275182.37.1771475.787T45SOD Permanent/Top hammer
Symmetrix overburden drilling systemOrder numberCasing wall 
max. thicknessRing bitPilot bitUnitInnerOuterOuterATLAS-SOD 768418858mm0.311.613.462.26inchATLAS-SOD 8985410070mm0.312.133.942.76inch
Prodrill successfully manufactured ROBIT Rox+ Symmetrix Casing System, size as follow: 
1. Casing O.D 89mm 
2. Casing wall Max. 4mm. 
3. Ring Bit I.D. 71mm, 
4. Ring Bit O.D 99mm
5. Pilot bit. O.D 80mm
This Symmetrix Casing System, Pilot bit, and Ring Bits are widely applied for forepiling tunnel tube umbrella anchoring, water well, foundation.

More Info.

Outer Dia Of Casing Tube	Inner Dia Of Casing Tube	Reamed Dia	Min Inner Dia Of Casing Shoe	Drill Pipes	Max.Outer Dia Of Normal Bit
mm	mm	mm	mm	mm	mm
114	101-103	127	91	76	77
127	114-116	136	101	76	82
140	124-127	152	117	76	92
146	127-132	154	117	76	105
168	149-155	184	140	76	105
178	159-165	194	150	76.89	125
193	173-180	206	164	76.89	140
219	199-206	234	184	89.114	150
244	224-231	260	210	89.114	165
273	251-257	305	240	114	190
323	301-310	348	284	114.127	220
406	382-388	440	364	127	255
457	433-439	488	413	140	340
508	484-490	538	464	140	385
558	534-540	590	514	140	440
610	586-592	642	566	140	485
660	636-642	694	615	168	540
711	687-693	745	665	168	590
762	738-744	798	716	168	640
863	839-845	900	815	168	685

Ps.: Others about Prodrill Equipment Co., Ltd
1. Prodrill Main Products as below: 
1) Rock drill:
Handheld rock Drill (Jackhammer): Y10, Y18, Y20, Y24, Y26, TY24C, etc;
Airleg rock drill: YT24, YT28, etc;
Gasoline rock drill: YN27
2) Drill rod: Taper rod (hex. 22 * 108mm)
3) Drill bit: Taper button bit, Taper chisel bit, Taper cross bit; Thread button bit (Top hammer); DTH Hammer and DTH bit; Overburden Drilling System
4) Splitter: Handheld stone splitter (or shims and wedges or plug and feather), G10 pneumatic splitter; Hydraulic Splitter
5) Breaker: Hydraulic Breaker, Pneumatic Breaker G10, TPB, etc;
6) Splitting or Cracking Powder for Construction/ Quarry/ Rock: Expansive mortar Soundless Cracking Agent; High Range Soundless Cracking Agent

2. Advantages:
Compared the Rock Drilling Tools with the oversea brands, our advantages are bellowing:
a. Our products can match over 95% against the original products
b. Price are competitive against the famous brands and best quality against the small factory
 
3. About Us:
1.    Our factory has been specialized in manufacturing drilling tools and spare parts for over 10 years.
2.    We have advanced technology and equipment.
3.    Our technician has more than 13 year's professional working experience.
4.    Rock drilling tools are exported throughout the world. Main market: Norway, Turkey, USA, Canada, Australia, Brazil, Uruguay, Iran, Philippines, Thailand, India, etc.