Mincon MQ68 Hammer

The Mincon MQ68 hammer is designed around proven technology to perform at the top end of the performance scale compared to other tools on the market. These tools are excellent for all types of drilling applications including residential geothermal, production quarry drilling, seismic drilling and small construction drilling.

Key Features and Benefits

Patented features maximize energy output and reduce service requirements.
Fewer internal components minimize service requirements.
Valveless, high frequency design ensures smooth operation.
Hardened wear sleeve for optimum wear resistance even in the most abrasive conditions.
Multi-start threads on backhead and chuck ensure easy coupling/uncoupling of hammer.
Unique internal mount system eliminates the need for wear shims and special assembly tools.
All critical internal components are heat treated under strict control to maximize tool longevity.

For more information:

+40 314 253 800
info@romned.ro

Ron van Dam
CEO

Specifications

Specifications	Metric	Imperial
Hammer Outside Diameter	146mm	5.75″
Hammer Length (Less Bit, Backhead Shoulder to Chuck)	1002mm	39.4″
Backhead Spanner Flat Size	100mm	4″
Drill Bit Shank Type	QL60
Minimum Bit Size	152mm	6.0″
Hammer Weight (Less Bit)	87.9Kgs	194Lbs
Drill Bit Weight (165mm/6 1/2″)	24.5Kgs	54Lbs
Piston Weight	19.3Kgs	42.5Lbs
Backhead Stand Off	0.75mm	0.030″
Make up Torque	6100-8135 NM	4500-6000 FT Lbs
Wear Sleeve Reverse Limit	Non Reversible
Wear Sleeve Discard Limit	128.5mm	5.060″
Recommended Minimum Air Package	283 l/s @ 20.7 Bar	600 cfm @ 300 psi

Parts list

Item #	Part Number	Description
	MC601AS01	Mincon MQ68 (3 1/2″ A.P.I. Reg. Pin)
1	MC601BH01	Backhead (3 1/2″ A.P.I. Reg. Pin)
2	MD622OR01	O Ring
3	MB506CH01	Choke Blank
4	MB502CV01	Check Valve
5	MB503SP01	Spring
6	MB504SM01	Steel Make-Up Ring
7	MB505LR01	Lock Ring
8	MC603LM01	Lock Ring Mount
9	MD607DR01	Air Distributor
10	MD621OR01	O Ring
11	MD620OR01	O Ring
12	MC609SR01	Seating Ring
13	MC608IC01	Inner Cylinder
14	MC610PN01	Piston
15	MC611WS01	Wear Sleeve
16	MC612PR01	Piston Retaining Ring
17	MD622OR01	O Ring
18	MD622OR01	O Ring
19	MC613BB01	Aligner
20	MC614BR01	Bit Retaining Ring
21	MD621OR01	O Ring
22	MC615CK01	Chuck (QL60)
23	MD626SK04	Service Kit

	MD626SK04	Service Kit
3	MB506CH01	Choke Blank
	MB506CH02	Choke 1/8″ (3.2mm)
	MB506CH03	Choke 3/16″ (4.8mm)
5	MB503SP01	Spring
	MD625OK04	O Ring Kit

	MD625OK04	O Ring Kit
2	MD622OR01	O Ring
10	MD621OR01	O Ring
11	MD620OR01	O Ring
17	MD622OR01	O Ring
18	MD622OR01	O Ring
21	MD621OR01	O Ring

Air consumption

6 5 MQ68 AC

Air Pressures are given for compressors operating at seal level at 20° C (68º F). Corrections to actual compressor volume should be made to account for temperature, altitude and relative humidity.

DTH hammers must receive a constant supply of proper rock drill oil to protect the internal components and to provide a good air seal between the hammer’s running surfaces for efficient drilling. Mincon recommends the use of Mincon Envirosafe® Rock Drill Oil (RDO) to maintain optimal performance and extend the life of the internal components. The correct consumption of oil is dependent upon the air volume and conditions. Please refer to the lubrication graph below for recommendations. When drilling in wet conditions the normal amount should be doubled. There should be visual evidence of oil around the drill bit shank and within the tube joints when changing tubes.

If using petroleum based rock drill oils, the recommended grade of oil is dependent on the ambient temperature and the operating pressure. As a rule of thumb, ISO320 grade rock drill oil should be used whenever possible as the hammer is a high frequency tool, however, where the pump cannot pump the oil in colder conditions, a lower grade of oil can be used as per the graph below.

Dirt Bits

Note: The Part Numbers below require the Carbide Insert type code to be added on the end to complete them. For a combination of carbide inserts use the gauge row code first and then the face code.

Diameter	Face Type	Part Number	No. x Button Dia (inch)	Flushing holes	Weight Approx.
mm	inch	Outer	Inner	Front	Kgs.	Lbs.
159	6 1/4	Concave	62QL60C58	8 – 5/8	4 – 5/8	4 – 5/8	2	23.6	52
159	6 1/4	Concave	62QL60C38	8 – 3/4	4 – 5/8	4 – 5/8	2	24.1	53
165	6 1/2	Concave	64QL60C58	8 – 5/8	4 – 5/8	4 – 5/8	2	24.5	54
165	6 1/2	Concave	64QL60C335	8 – 3/4	4 – 3/4	4 – 5/8	2	25	55
165	6 1/2	Flat Face	64QL60F38	8 – 3/4		8 – 5/8	2	25	55
165	6 1/2	Convex	64QL60V359	9 – 3/4	4 – 5/8	4 – 5/8	3	25	55
171	6 3/4	Concave	66QL60C58	8 – 5/8	4 – 5/8	4 – 5/8	2	25.4	56
171	6 3/4	Concave	66QL60C335	8 – 3/4	4 – 3/4	4 – 5/8	2	25.4	56
171	6 3/4	Concave	66QL60C39	9 – 3/4	6 – 5/8	5 – 5/8	3	25.4	56
171	6 3/4	Convex	66QL60V359	9 – 3/4	4 – 5/8	4- 5/8	3	25.4	56
171	6 3/4	Flat Face	66QL60F30	10 – 3/4		12 – 5/8	2	25.4	56
178	7	Concave	70QL60C39	9 – 3/4	6 – 5/8	5 – 5/8	3	26.3	58
178	7	Flat Face	70QL60F39	9 – 3/4		11 – 5/8	3	26.3	58
190	7 1/2	Concave	74QL60C39	9 – 3/4	6 – 3/4	5 – 3/4	3	30.4	67
190	7 1/2	Flat Face	74QL60F39	9 – 3/4		11 – 3/4	3	30.4	67
197	73/4	Concave	76QL60C50	10 – 5/8	4 – 5/8	8 – 5/8	2	32.7	72
200	7 7/8	Concave	77QL60C39	9 – 3/4	6 – 3/4	5 – 3/4	3	33.6	74
200	7 7/8	Convex	77QL60V39	9 – 3/4	6 – 3/4	5 – 3/4	3	33.6	74
203	8	Concave	80QL60C30	10 – 3/4	6 – 3/4	7 – 3/4	2	34.1	75
203	8	Convex	80QL60V39	9 – 3/4	6 – 3/4	6 – 3/4	3	34.1	75
216	81/2	Concave	84QL60C30	10 – 3/4	7 – 5/8	12 – 5/8	2	35.9	79
219	8 5/8	Concave	85QL60C30	10 – 3/4	6 – 5/8	12 – 5/8	2	36.8	81
222	8 3/4	Concave	86QL60C30	10 – 3/4	6 – 5/8	12 – 5/8	2	36.8	81

Documents

Mincon 6″ Range Brochure
Mincon MQ68 Operation and Service Manual
Mincon DTH Tools Product Catalogue