Mincon MR92 RC Hammer (3.5″ Remet)

The MR range of RC hammers is designed to perform at the top end of the performance scale compared to other tools on the market. With extensive testing over an 18 months period the MR range of tools offers some very significant benefits over it’s predecessor, the MX range of RC hammers.

Performance improvements show up to 20% increase in production in both grade control and exploration applications vs. the Mincon MX range. As with all Mincon hammers the tools performed extremely well in deep hole drilling in dry applications and where there is a lot of water in the bore hole. With a variable length available on the chuck sleeve the hammer can be easily set up for either dry or wet hole drilling. Set to become the standard by which RC hammers will be measured, the Mincon MR range of tools get the job done.

Key Features and Benefits

  • Patented mounting system for fixed internal components.
  • An extremely sturdy shank with a short length allows for greater transfer of energy between the piston and bit.
  • Variable chuck sleeve lengths for varying drilling conditions.
  • Single piece sample tube assembly.
  • Specially heat treated sample tubes offer superior wear resistance vs. our competitors.
  • Variable sample tube bore sizes allows the contractor greater flexibility in setting up his tool.
  • 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.
  • Metal sprayed chuck sleeve and wear sleeve options for greater wear resistance on outside circulation.
  • All critical internal components are heat treated under strict control to maximize tool longevity.
  • Ease of service with no special assembly or disassembly tools required.

For more information:

+40 314 253 800

Ron van Dam

Specifications Metric Imperial
Hammer Outside Diameter 92mm 3.62″
Hammer Length (Less Drill Bit) 1146mm 45.1″
Backhead Spanner Flat Size 76mm 3″
Drill Bit Shank Type MR92
Backhead Thread 3.5″ Remet
Drill Bit Size Range 102mm – 115mm 4″ – 4.5″
Hammer Weight (Less Bit) 47 Kgs 103 Lbs
Maximum Drill Bit Weight 11 Kgs 24.4 Lbs
Piston Weight 12 Kgs 26.4 Lbs
Make up Torque 3687-4921 NM 2720-3630 FT Lbs
Backhead Stand Off 0.75mm 0.030″
Recommended Minimum Air Package 25.5m3/min @ 24.1Bar 900cfm @ 350psi
Item # Part Number Description
MR92AS01 Mincon MR92 (3.5″ Remet)
1 1300-0700 Internal Circlip
2 BS 132 O Ring x 2
3 MX4044AT01 Adaptor Tube 3.5″ Remet
4 BS 126 O Ring x 2
5 BS 036 O Ring
6 MX4044SC01 Airscreen
7 MX4044BH01 Backhead 3.5″ Remet
8 BS 233 O Ring
9 8405-137 Check Valve Seal
10 MX4044SCV01 Check Valve Plunger
11 MX4044SP04 Check Valve Spring
12 MX4044SM01 Steel Make Up Ring
13 MX4044LR01 Lock Ring
14 MX4044TT01 Top Tube
15 BS 126 O Ring
16 MX4044SS01 Spacer
17 MX4044ST01 Sample Tube
18 BS 128 O Ring
19 MX4044DR01 Sample Tube Mount
20 BS 138 O Ring
21 BS 036 O Ring
22 MX4044SR01 Seating Ring
23 MX4044IC01 Inner Cylinder
24 MX4044PN01 Piston
25 MR92WS01 Wear Sleeve
26 MX4044PR01 Piston Retaining Ring
27 MR92BB01 Aligner Bearing Bush
28 BS 232 O Ring x 2
29 MR92BR01 MR92 Bit Retaining Ring
30 BS 139 O Ring
31 MR92CSxxx Chuck Sleeve
32 MR92CK01 MR92 Chuck
MR92OKIT MR92 O Ring Kit
MR92MK01 MR92 Make Up Service Kit

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.

Diameter Face Type Part Number Description No. x Button Dia (inch) Sample holes Weight Approx.
mm inch Outer Face Centre Kgs. Lbs.
102 4 Drop Centre 5092102D1 MR92 4″ DC BIT 8 * 1/2 4 * 1/2 2 * 1/2 2 7.8 17.2
102 4 Hard Formation 509102H1 MR92 4″ HF BIT 8 * 1/2 4 * 1/2 2 * 1/2 2 7.8 17.2
105 4 1/8 Drop Centre 5092105D1 MR92 4 1/8″ DC BIT 8 * 1/2 4 * 1/2 2 * 1/2 2 8 17.6
108 4 1/4 Drop Centre 5092108D1 MR92 4 1/4″ DC BIT 8 * 1/2 4 * 1/2 2 * 1/2 2 8.2 18.1
114 4 1/2 Drop Centre 5092114D1 MR92 4 1/2″ DC BIT 8 * 9/16 4 * 9/16 2 * 1/2 2 8.6 19.0
117 4 5/8 Drop Centre 5092117D1 MR92 4 5/8″ DC BIT 8 * 9/16 4 * 9/16 2 * 1/2 2 9 19.8