Rock Drilling Tools and Bits for Quarrying, Mining and Construction
Top hammer bits from 32 to 115 mm on R25, R28, R32, R38, T38, T45 and T51 threads, small-hole DTH bits, and the drill string that carries them: integral drills, extension rods, MF rods, shank adapters and couplings. Built for natural stone, aggregate and rock excavation.
- Every thread and diameter we actually make is listed on this page, in one table
- What we do not make is listed too, so you do not waste an enquiry finding out
- In Ankara since 1991, tools and machines from the same maker
5 types · 32 to 115 mmTop Hammer BitsButton, ballistic, cross, chisel and retrac faces on R25 to T51 threads. The bulk of quarry and bench drilling.Button · Ballistic · X-Bit · Chisel · Retrac 
4 types · small-hole onlyDown-the-Hole BitsButton and ballistic faces for the SETJET 1.8 and 2.1 hammers, from 75 and 90 mm. Small-hole DTH, not well drilling.1.8 Button · 1.8 Ballistic · 2.1 Button · 2.1 Ballistic 
3 familiesRods, Adapters and CouplingsEverything between the rock drill and the bit: integral drills, extension and MF rods, shank adapters, couplings.Integral · Extension · MF · Shank adapter · Coupling 
3 toolsSpecial-Purpose ToolsThree tools built for one job each: coal seam augering, and the pilot groove that guides a diamond wire.Jack bit · Auger rod · Tracking bit Two drilling methods, two sets of tools, and they do not interchange
Nearly every wrong order in this category comes from the same confusion. Get the method right and the thread follows; get the thread right and there is only one bit that fits. Everything below is drawn from the sizes we actually publish.
Top hammer: the blow travels down the rod
The percussion unit sits on the machine and sends the blow through the rod to the bit. Energy is lost with every metre and every joint, which is why top hammer is a 32 to 115 mm method and practical to about 10 m. The rod carries a threaded connection: R25, R28, R32 and R38 at the small end, T38, T45 and T51 as holes get bigger. The thread is the part number that matters.
Down-the-hole: the hammer rides at the bottom
The hammer follows the bit down the hole and strikes it directly, so no energy is lost to rod length and a hole stays straight for 25 to 30 m. The bit does not have a thread, it has a splined shank matched to one hammer. Our DTH bits are made for the TIGER SETJET 1.8 and 2.1 hammers, which drill from 75 mm and from 90 mm. Tell us the hammer, not a diameter.
The face decides how the rock breaks
Spherical buttons last longest and suit hard and abrasive rock. Ballistic buttons are parabolic or conical, cut faster, and wear quicker. A cross or X face breaks rock into smaller fragments and holds line in medium-hard, low-abrasive ground. A chisel face is a single flat edge for fast penetration in softer, fractured rock. Retrac adds a gauge skirt that pulls the string back out of collapsing ground.
A bit is a consumable, the string is an asset
Bits and rods are where the running cost of drilling actually sits, well above the machine once a year has passed. A sharp bit drills; a blunt one polishes, and the cost lands on air, fuel and shift time long before the bit looks finished. Resharpening with a bit grinder extends life several times over, which is why it sits in our accessories range rather than here.
What we make, and what we do not
We would rather tell you now than after you have sent an enquiry. Set Makina builds rock drilling tools for quarrying natural stone, mining and construction rock excavation. That is a specific band of hole sizes, and a great deal of drilling falls outside it.
We make these
- Top hammer bits, 32 to 115 mm, on R25, R28, R32, R38, T38, T45 and T51 threads
- Button, ballistic, cross, chisel and retrac faces across that range
- Small-hole DTH bits for the TIGER SETJET 1.8 and 2.1 hammers, drilling from 75 mm and from 90 mm
- Integral drills, H22x108 shank, 25 to 40 mm, 800 to 8,000 mm long
- Extension rods, MF rods, shank adapters and couplings in the same R and T thread families
- Coal seam auger rods and jack bits, and a tracking bit for diamond wire pilot grooves
We do not make these
- Bits larger than 115 mm. That is the top of our range and there is nothing above it
- Large DTH bit families such as DHD, QL, COP, Mission or SD. Our DTH line is small-hole only
- T60, GT60, ST58 or ST68 threads for large bench and production blastholes
- Tricone, roller cone or PDC bits, and nothing for rotary drilling
- Tooling for water boreholes, geothermal or deep wells, where holes typically start where our range ends
- Horizontal directional drilling, piling, soil investigation, core barrels, wireline or casing
The honest summary: the industry drills DTH holes from roughly 90 mm up to about 254 mm, and we serve only the bottom of that band. If your hole is bigger than 115 mm, or you are drilling for water, heat or oil rather than for stone and rock, we are not the right supplier and we will say so rather than quote you something that will not fit.
Still not sure whether your job is inside that line? Send the thread or hammer, the hole diameter and the depth. If it is outside our range we will tell you in the first reply.
Check if we can supply itEvery thread and diameter we make
One table, the whole range. If your size is not in it, we do not make it. Compiled from the published size lists on each product page.
Open the full size list: every thread and diameter
| Thread or shank | Diameters we make | Faces available | Where it is used |
|---|---|---|---|
| Top hammer, threaded | |||
| R25 | 33, 35, 38, 43, 45 mm | Button, ballistic | Hand-held and light rock drills, small holes |
| R28 | 38, 41 mm | Button, cross | Light drilling, small holes |
| R32 | 41, 43, 45, 51, 55, 64 mm | Button, ballistic, cross | The general-purpose middle of the range |
| R38 | 64, 76 mm | Button, cross | Heavier small-hole work |
| T38 | 64, 76, 89, 102 mm | Button, ballistic, cross, retrac | Bench drilling, the start of the T series |
| T45 | 76, 89, 102 mm | Button, retrac | Quarry bench and production drilling |
| T51 | 89, 102, 115 mm | Button, retrac | The largest holes we make |
| Top hammer, no thread designation published | |||
| Chisel bits | 32, 34, 36, 38 mm | Chisel, flat single edge | Softer and fractured rock, hand drilling |
| Jack bit, pin connection | 42, 44 mm | Two-wing conical | Coal seams, on TIGER RD20 auger rods |
| Tracking bit | 38, 40 mm | Carbide insert | Pilot groove guiding a diamond wire in granite |
| Down-the-hole | |||
| SETJET 1.8 hammer | From 75 mm | Button, ballistic | Small-hole DTH, hammer outside diameter 62 mm |
| SETJET 2.1 hammer | From 90 mm | Button, ballistic | Small-hole DTH, hammer outside diameter 74 mm |
Diameters are grouped by thread rather than by product, because the thread is what decides fit. The same diameter often exists in more than one face type: a 89 mm T45 bit is available as a button or as a retrac, for example. DTH bits are specified against the hammer rather than by diameter, so the two SETJET rows give the hammer rather than a size list. Taper angles for the chisel and tapered ballistic bits are not currently published, so ask when you order those.
Scroll the table sideways to see every column.
Found your thread and diameter? Send it with the rock type and roughly how many metres a month you drill and we will quote the face type as well as the size.
Send your thread and diameterWhich tool for which job
Start from the hole and the rock, not from the part number.
| What you are drilling | Method | Tool you need |
|---|---|---|
| A line of holes to split a block off the quarry face | Top hammer, 32 to 45 mm | Button or ballistic bit on R25 or R32, integral drill or extension rods |
| Bench holes for blasting in a quarry or open pit | Top hammer, 76 to 115 mm | Button or retrac bit on T38, T45 or T51, extension rods and couplings |
| Vertical and horizontal holes for diamond wire sawing | DTH, from 75 or 90 mm | DTH button or ballistic bit matched to a SETJET 1.8 or 2.1 hammer |
| Ground that keeps collapsing on the way out | Top hammer | Retrac bit on T38, T45 or T51, for the gauge skirt |
| Hard, abrasive rock where bit life is the problem | Either | Spherical button face rather than ballistic |
| Softer or fractured rock where speed is the problem | Top hammer | Ballistic or chisel face |
| Medium-hard rock where hole straightness matters | Top hammer | Cross or X face |
| Holes in a coal seam | Auger | TIGER auger rod with a 42 or 44 mm jack bit, on the RD20 |
| The pilot groove that guides a diamond wire in granite | Not a hole at all | Tracking bit, 38 or 40 mm |
| A hole larger than 115 mm, or a water, geothermal or oil well | Outside our range | We do not supply it. See what we make, above |
Scroll the table sideways to see every column.
Top Hammer Bits
Five faces across seven thread families, 32 to 115 mm. The button bit is the default and the widest range: spherical and semi-spherical tungsten carbide buttons from R25-38 mm up to T51-115 mm, chosen when bit life matters more than raw speed. The ballistic bit swaps those for parabolic or conical buttons that cut faster and wear faster, in R25, R32 and T38. The X-bit carries two intersecting carbide edges that break rock small and hold a straight hole in medium-hard, low-abrasive ground, in R28, R32, R38 and T38. The chisel bit is a single flat edge in 32 to 38 mm for softer and fractured rock. The retrac bit is not a face at all but a gauge skirt on T38, T45 and T51, for ground that collapses behind the string.
Tell us the thread on your rod, the hole diameter and whether the rock is hard and abrasive or soft and fractured, and we will name the face as well as the size. Get top hammer bits quoted →
Down-the-Hole Bits
Four bits for two hammers. These are not sized the way top hammer bits are: a DTH bit has a splined shank cut to match one hammer, so the hammer decides the bit and the hole diameter follows. Ours are built for the TIGER SETJET 1.8, which has a 62 mm outside diameter and drills from 75 mm, and the TIGER SETJET 2.1, at 74 mm outside diameter drilling from 90 mm. Within each hammer you choose the face: a button face for life in hard abrasive rock, a ballistic face for speed in medium and hard formations. This is small-hole DTH for quarrying and construction, and it is the whole of our DTH range.
Tell us which hammer you run and the hole diameter you are drilling to, and we will match the bit. If you are running a hammer from another maker, send the shank designation. Get DTH bits quoted →
Rods, Adapters and Couplings
The drill string is everything between the rock drill and the bit, and it is where energy is lost if anything is mismatched. Integral drills are one piece, rod and bit together, with an H22x108 shank, 25 to 40 mm diameter and lengths from 800 mm to 8,000 mm. Extension rods come in T45, T51, R32 and R25/Hex22 from 800 to 4,300 mm, with MF rods in T45 and T51 at 3,660 mm for reduced thread wear on longer strings. Shank adapters in R25/H22 and R32/H22 make the connection at the rock drill. Couplings join rod to rod in R25, R32, R38, T38, T45 and T51, with R25/R32 and R32/R38 available where you need to step between sizes.
Send the rock drill model and the depth you are drilling to and we will put the string together: shank adapter, rods, couplings and bit, in matching threads. Get a drill string quoted →
Special-Purpose Tools
Three tools that each do one job and do not belong to the general range. The jack bit is a two-wing conical bit with a pin connection in 42 and 44 mm, made to mount on auger rods on the TIGER RD20 pneumatic unit. The auger rod is the helical rod it fits, in 1,300 and 1,500 mm lengths with a 16 mm round or 13x13 mm square shank, for drilling coal seams underground. The tracking bit is not a hole-drilling tool at all: at 38 and 40 mm it cuts and maintains the pilot groove that guides a diamond wire in granite quarrying, which is why it sits beside our wire saws as much as beside our bits.
These are specified against the machine rather than the hole. Tell us which unit you are running and we will confirm the size and the connection. Ask about special-purpose tools →
All fifteen tools compared
Published figures from each product page. Where a figure is not published we say so rather than estimate it.
Open the full comparison of all fifteen tools
| Tool | Threads or shank | Sizes | Face or type | Published for |
|---|---|---|---|---|
| Top hammer bits | ||||
| TIGER Button Bit | R25, R28, R32, R38, T38, T45, T51 | 38 to 115 mm | Spherical and semi-spherical buttons | Mining, tunnelling, construction, wide rock range |
| TAPERED BALLISTIC BIT | R25, R32, T38 | 33 to 102 mm | Parabolic or conical buttons | Medium-hard rock, higher penetration rate |
| TIGER X-BIT | R28, R32, R38, T38 | 38 to 89 mm, plus a 40 mm cross bit | Cross, two intersecting carbide edges | Medium-hard, low-abrasive rock |
| TAPERED CHISEL BIT | Not published | 32, 34, 36, 38 mm | Chisel, flat cutting edge | Medium-hard and fractured rock |
| TIGER RETRACT BIT | T38, T45, T51 | 76, 89, 102 mm | Retrac skirt, button and ballistic faces | Fractured or loose ground, hole collapse risk |
| Down-the-hole bits | ||||
| DTH 1.8 BUTTON BIT | SETJET 1.8 hammer | From 75 mm | Button | Medium and hard rock, energy transfer |
| DTH 1.8 BALLISTIC BIT | SETJET 1.8 hammer | From 75 mm | Ballistic | Medium and hard rock, cutting speed |
| DTH 2.1 BUTTON BIT | SETJET 2.1 hammer | From 90 mm | Button | Medium and hard rock, service life |
| DTH 2.1 BALLISTIC BIT | SETJET 2.1 hammer | From 90 mm | Ballistic | Medium and hard rock, faster progress |
| Rods, adapters and couplings | ||||
| INTEGRAL DRILL | H22x108 shank | 25 to 40 mm diameter, 800 to 8,000 mm long, 3.0 to 24.7 kg | One-piece rod and bit | General drilling, medium to deep holes |
| EXTENSION ROD | T45, T51, R32, R25/Hex22 | 800 to 4,300 mm | Threaded both ends | Medium to deep-hole drilling |
| MF ROD | T45, T51 | 3,660 mm | Male and female ends | Reduced thread wear, better energy transfer |
| SHANK ADAPTER | R25/H22, R32/H22 | 265 to 2,400 mm | Rock drill to rod connection | Securing the string at the machine |
| COUPLING | R25, R32, R38, T38, T45, T51, plus R25/R32 and R32/R38 | Not published | Rod to rod connector | Energy transfer, vibration reduction |
| Special-purpose | ||||
| TIGER JACK BIT | Pin connection | 42, 44 mm | Two-wing conical | Coal mining, on TIGER RD20 auger rods |
| TIGER AUGER ROD | 16 mm round or 13x13 mm square shank | 1,300 and 1,500 mm | Helical auger rod | Coal seams, underground mining |
| TIGER TRACKING BIT | Not published | 38, 40 mm | Carbide insert | Diamond wire pilot groove in granite quarries |
Several figures are deliberately left as not published because they are not currently on the product pages: taper angles for the chisel and tapered ballistic bits, carbide button counts on every bit, coupling lengths and diameters, and the full size list for the DTH bits, which are specified against the hammer. Ask for any of these and we will confirm them from the factory rather than let you order from a number we have not verified.
Scroll the table sideways to see every column.
How to choose
Four questions in this order. The first two eliminate almost everything.
1. Top hammer or down-the-hole?
If the percussion unit is on the machine, it is top hammer and the thread on your rod decides the bit: R25 through T51, 32 to 115 mm. If the hammer goes down the hole, the hammer decides the bit and the thread is irrelevant. People order the wrong tool here more often than anywhere else, because both are called rock drilling and the catalogues look alike.
2. What thread is already on your string?
This is usually settled for you. A site running T45 rods needs T45 bits and T45 couplings, and changing family means changing the string. R25, R28, R32 and R38 cover 33 to 76 mm; T38, T45 and T51 cover 64 to 115 mm. If you are starting fresh, the hole diameter picks the family rather than the other way round.
3. Is the rock hard and abrasive, or soft and fractured?
Hard and abrasive wants spherical buttons: slower, but the face survives. Soft or fractured wants ballistic buttons or a chisel edge, which cut faster and accept shorter life. Medium-hard where the hole must stay straight wants a cross face. If the hole walls collapse behind the string, none of that matters as much as a retrac skirt.
4. Are you buying one bit or a programme?
For one bit, the thread and diameter are enough. If you drill every day, the useful question is cost per metre rather than price per bit, and that depends on matching the face to the rock and resharpening before the buttons flatten. Tell us metres per month and we will work it as a consumption rate rather than a quote.
If you run a quarry
Your bits, rods and couplings have to match the machines already on the bench, so tell us those first. We build the drilling machines too, which means a string can be specified end to end rather than assembled from three suppliers. Our guide to reducing cost per metre drilled works through where consumables actually land in the cost.
If you are a dealer or a reseller
The useful thing to know is where our range stops: 115 mm and T51 at the top, no large DTH families, nothing for water or geothermal. Within that band we cover the full thread set and the common faces, and we manufacture rather than rebrand. Tell us the market you serve and we will say plainly which of your enquiries we can cover and which we cannot.
Send the thread, the diameter, the rock and roughly how many metres a month. We come back with the bit, the face type, the string to carry it and the price.
Send your four answersWorth reading before you order
Where the money in drilling consumables actually goes.
Technical guideReducing cost per metre drilledThe metric most operations never calculate properly. Bit wear, compressor energy, unplanned downtime and rod losses, and where each one actually lands in the cost of a metre.Read the article 
Technical guideDrilling or cutting for granite extraction?In marble the question was settled decades ago. In granite it is open on every new project, and the answer decides how many bits and rods you consume for every cubic metre you sell.Read the article 
ReferenceThe full quarry equipment listWhat a granite quarry producing 1,000 m3 of blocks a month actually runs, machine by machine, including the drilling tools that rarely appear on a purchase list until they run out.Read the article Frequently asked questions
What is the largest bit you make?
115 mm, as a T51 button or retrac bit. That is the top of our range and there is nothing above it. Our down-the-hole line is small-hole only, built for the SETJET 1.8 and 2.1 hammers, which drill from 75 mm and from 90 mm. The industry drills DTH holes up to about 254 mm; we serve only the bottom of that band. If your hole is larger than 115 mm we are not the right supplier and we will tell you so straight away.
Do you supply bits for water well, borehole or geothermal drilling?
No. Those holes normally start at around the diameter where our range stops, and they use hammer and bit families we do not manufacture. We also do not make tricone, roller cone or PDC bits, anything for rotary drilling, or tooling for horizontal directional drilling, piling, soil investigation, core barrels, wireline or casing. Everything we build is for drilling rock in quarries, mines and construction excavation.
Which thread sizes do you make?
R25, R28, R32 and R38 in the small range, and T38, T45 and T51 as holes get larger. Couplings are made in all six of R25, R32, R38, T38, T45 and T51, plus R25/R32 and R32/R38 step couplings. Extension rods come in T45, T51, R32 and R25/Hex22, and shank adapters in R25/H22 and R32/H22. We do not make T60, GT60, ST58 or ST68, which are the large bench and production blasthole threads.
How do I know which bit fits my rod?
The thread designation on the rod is the answer, and it is usually stamped on it. A T45 rod takes a T45 bit and a T45 coupling, and nothing else fits. If you are not sure, send us a photograph of the rod end and the diameter across the thread and we will identify it. Mixing thread families is the single most common ordering mistake in this category.
What is the difference between a button bit and a ballistic bit?
The shape of the carbide. A button bit carries spherical or semi-spherical buttons, which wear slowly and suit hard, abrasive rock where bit life is the constraint. A ballistic bit carries parabolic or conical buttons, which penetrate faster and wear faster, and suit medium-hard rock where speed is the constraint. Same threads, same diameters in most sizes, different trade-off.
When should I use a retrac bit?
When the hole walls collapse or the ground is fractured enough that the string jams on the way out. A retrac bit carries a gauge skirt that reams the hole as the string is pulled back, which keeps it open. We make them in T38, T45 and T51 at 76, 89 and 102 mm, with button and ballistic faces. In stable ground a retrac bit costs more and gives you nothing, so it is a ground-condition choice rather than an upgrade.
What is an X-bit or cross bit for?
Two carbide edges crossing at right angles, which break rock into smaller fragments and hold a straighter hole than a button face in medium-hard, low-abrasive ground. We make them in R28, R32, R38 and T38 from 38 to 89 mm, plus a 40 mm cross bit. In hard, abrasive rock a button face will outlast it comfortably.
How are DTH bits sized?
Not by thread, and not really by diameter. A DTH bit has a splined shank cut to match one hammer, so the hammer decides which bit fits and the hole diameter follows from the hammer. Ours are made for the TIGER SETJET 1.8, which is 62 mm across and drills from 75 mm, and the SETJET 2.1, which is 74 mm across and drills from 90 mm. Tell us the hammer rather than a diameter, and if you run a hammer from another maker send us the shank designation.
What is the difference between an integral drill and an extension rod?
An integral drill is one piece: rod and bit forged together, with an H22x108 shank, 25 to 40 mm diameter and lengths from 800 mm to 8,000 mm. There is nothing to assemble and nothing to lose, but when the bit is finished the rod goes with it. An extension rod is threaded at both ends so bits, couplings and further rods attach to it, which is what lets you drill deeper than one rod length. Most quarry work above about 45 mm uses extension rods.
Do you make rods for down-the-hole hammers as well?
Yes, but they are a separate line with no interchange. DTH drill rods use RD50 or API threads in 1 to 1.5 m lengths; the top hammer extension rods on this page use R and T threads. The two thread families do not connect to each other, and a rod from one system is useless in the other, so be clear which method you are drilling with before ordering rods.
Can I resharpen bits rather than replace them?
Yes, and on a working quarry it usually pays. Penetration rate falls well before a bit looks worn out, and grinding the buttons back restores it several times over the life of a bit. The grinder we build for it runs at up to 6,000 rpm on 6 bar and holds the set angle and radius in one movement, which matters because the geometry is what you are trying to preserve. It sits in our accessories range.
Do these tools carry CE or ISO certification?
The CE marking and ISO certification shown across this site apply to Set Makina machinery and to our production. The bits, rods and couplings here are consumable tooling and are not individually certified equipment. If a tender or a site requires a specific declaration or material certificate for a particular item, ask us before ordering and we will confirm exactly what that item carries rather than let you assume.
Related categories and reading
Send the thread and the diameter
The thread on your rod or the hammer you run, the hole diameter, the rock and roughly how many metres a month. We come back with the bit, the face type, the string to carry it and the price. If what you need sits outside the range on this page, we will say so in the first reply rather than quote you something that will not fit.