Two German Drilling Specialists
For concrete drilling, DREPS and Heller are best compared through the tool required for the job: substrate, reinforcement exposure, rotary hammer and hole size. Both companies develop and manufacture drilling tools. Their product ranges and routes to market provide useful context alongside the cutting-head design.
DREPS presents a focused range of carbide-tipped hammer bits and HERCULES core cutters, with production and distribution partners central to its company profile. Heller combines development and production in Dinklage with a broader professional drilling and accessory portfolio. For buyers, the practical task is to match the right series and construction to the intended work.
PROJAHN ROCKET 5: A DREPS Supply Example
PROJAHN sells ROCKET 5 under its own brand. According to our industry supply information, the ROCKET 5 version with five Crusher points is sourced from DREPS. This is a practical example of a drilling manufacturer supplying a separate sales brand.
PROJAHN describes five Crusher crushing points, cutting edges arranged at 90° and a four-spiral body. Its 2022 catalogue also specifies one-piece carbide through Ø28 mm and three-piece carbide from Ø30 mm. The five crushing points, cutting-edge layout and number of carbide components describe different aspects of the head.
The product page also identifies remaining stock in the ZENTRO 4x4 version. Confirm the article number and head version together with diameter, working length and overall length.
PROJAHN ROCKET 5 SDS-Max product information · PROJAHN 2022 catalogue: ROCKET 5 construction
Explore our Zhonghuan 5S OEM programme for the 5-Crusher head category.
DREPS Four-Cutter Heads Change with Diameter
DREPS’s official four-cutter specification gives a clear construction split: one-piece carbide tip up to Ø28 mm; three-piece carbide tip from Ø30 mm. The smaller version uses a single cross-shaped carbide component. The larger version distributes the cutting geometry across separate main and side inserts. Both belong to the four-cutter family.
The difference is visible in the end views: the one-piece cross has a continuous carbide outline, while the three-piece version shows joints between the main and side cutting elements. Specify cutting-edge count, carbide-component count and diameter together when ordering.
Three-Piece Head: Close-Up Views
The close-ups show a full-width primary carbide blade and separate side inserts. The visible joints help identify the three-piece construction.
Explore our ZHMAX-7 multi-insert 4-cutter programme for this class of head construction.
| DREPS four-cutter interface | Diameter range | Published standard lengths |
|---|---|---|
| SDS-Plus | Ø5–32 mm | 110–1,000 mm |
| SDS-Max | Ø12–52 mm | 340–920 mm |
These are family ranges. Confirm each diameter, working length and overall length against the selected article.
The Head, Flutes and Shank Work Together
The carbide head breaks the concrete, the flute entrances clear the cutting face, and the spiral body carries the debris out of the hole. The head-to-body transition and the space around the inserts therefore matter alongside the number of cutting edges.
The full-length view also shows why the machine connection belongs in the order specification. SDS-Plus and SDS-Max require their respective holders, and the selected hammer must support the intended hole diameter and working depth.
Compare the Relevant DREPS and Heller Families
For SDS-Plus four-cutter drilling, Heller 4Power Pro is a relevant comparison. Heller describes four cutting edges, four helixes and a double-centre tip for concrete and reinforcement. For heavier SDS-Max reinforced-concrete work, Trijet Ultimate is another family to assess, with its own multi-cutter geometry and centring design.
| Application / platform | DREPS starting point | Heller family to assess |
|---|---|---|
| SDS-Plus two-cutter drilling | DREPS two-cutter | Bionic Pro |
| SDS-Plus four-cutter drilling | DREPS four-cutter, with construction selected by diameter | 4Power Pro |
| SDS-Max reinforced-concrete drilling | DREPS four-cutter | Trijet Ultimate; compare its different multi-cutter geometry |
These are application comparisons. Match the actual diameter, head construction and working length before testing samples.
Select for the Concrete, Rebar and Hammer
Start with the concrete and expected reinforcement contact, then choose the hammer platform and required diameter × working length. For an existing drilling problem, identify whether the limiting factor is edge damage, slow progress, dust packing or bit deflection. That directs the comparison toward the head, carbide support, flutes or body stiffness.
Run samples with the same concrete, hammer, diameter and hole depth. Compare drilling progress, hole diameter, edge condition and dust transport. For a distributor programme, also confirm the available length combinations, product markings, packaging and replenishment requirements.
Develop Your SDS OEM Range with Zhonghuan
We manufacture SDS drill bits for distributors and private-label programmes. We can configure two-cutter, monobloc four-cutter and multi-insert heads around the intended concrete application, machine platform and diameter range.
Send your diameter × working-length list, machine models and expected quantities. Our engineering team will help define carbide and steel specifications, a suitable joining route, sample approval and packaging, then confirm quotation and lead time.
Compare our SDS-Plus range · Compare our SDS-Max range · Discuss your OEM programme
Frequently Asked Questions
Do DREPS four-cutter heads have the same construction at every diameter?
DREPS specifies a one-piece carbide tip through Ø28 mm and a three-piece carbide tip from Ø30 mm. The cutting-edge count stays four while the carbide-component construction changes.
Does four-cutter mean four carbide inserts?
It describes the cutting-edge layout. DREPS’s illustrated versions use either one carbide component or three components to form the four-cutter head.
Which Heller product is relevant to a four-cutter SDS-Plus comparison?
4Power Pro is Heller’s four-cutter SDS-Plus family for concrete and reinforcement. Match the required diameter and length before comparing samples.
Can SDS-Plus and SDS-Max versions use the same holder?
They require their respective machine holders. Confirm the interface and the hammer’s capacity for the chosen diameter and working depth.
What information is needed for an OEM quotation?
Provide the substrate and reinforcement conditions, diameter × working length, machine models, quantities and packaging requirements.
Official Sources and Further Product View
- DREPS company profile
- DREPS four-cutter: carbide construction and size ranges
- Heller company and manufacturing profile
- Heller 4Power Pro SDS-Plus
- Heller Trijet Ultimate SDS-Max
View the upright DREPS four-cutter profile
