Hangzhou Xinabo Intelligent Electromechanical Technology Co., Ltd builds intelligent pipe threading equipment and cordless power tools for fire-protection, plumbing and construction work. As a China-based 21V Lithium-Ion Brushless Rotary Hammer — 3-Mode Drill/Chisel/Hammer, 4.5J Impact Energy manufacturer, we supply this tool as the concrete-and-stone member of our 21V cordless family, sharing its battery platform with our cutters, wrenches, grinders and hole punchers.
- 21V DC high-power brushless motor, 0-1200rpm no-load speed
- 4.5J single-impact energy at 0-5500bpm
- 30mm maximum drilling diameter in concrete
- SDS / round quick-change chuck with side handle and depth gauge supplied as standard
Where This Rotary Hammer Fits on Site
The tool is built for drilling and chiselling in concrete, stone and other hard materials where a corded hammer is awkward to position or where a crew is already running 21V packs. Three application groups drive most of our orders:
- Renovation and building services — concrete wall drilling, air-conditioner sleeve holes, plumbing and electrical channelling, tile drilling.
- Fit-out and maintenance — wall anchor installation, furniture fixing, stone drilling.
- Outdoor and site works — railing installation, yard renovation, solar panel bracket fixing.
Specifications and What Each Figure Controls
The published figures below are the ones we quote against, and each one maps to a decision on site rather than to a catalogue line.
| Parameter |
Value |
What it controls |
| Rated voltage |
21V DC |
Compatibility with the 21V pack fleet already on site |
| Motor type |
High-power brushless |
Heat build-up and service life under repeated hammer duty |
| No-load speed |
0-1200rpm |
Bit start on tile and glazed surfaces; drilling rate in concrete |
| Impact frequency |
0-5500bpm |
Penetration in medium-hard concrete; chisel control |
| Impact energy |
4.5J |
Bite per blow when drilling anchors and sleeve holes |
| Max drilling diameter |
30mm (concrete) |
Upper limit for core and sleeve work; larger holes move to our drilling machines |
| Chuck |
SDS / round quick-change |
Which bit inventory the crew can use without adapters |
| Standard accessories |
Side handle, depth gauge |
Two-hand control and repeatable hole depth |
Three Modes: Drill, Hammer Drill and Chisel
A selector switches the tool between rotation only, rotation with impact, and impact only. The mode is a work decision, not a preference: the wrong setting is the usual cause of burnt bits and stalled motors.
- Drill — rotation without impact for tile, light masonry and timber or metal with the appropriate chuck and bit.
- Hammer drill — rotation plus impact for concrete walls, anchor holes and sleeve openings up to 30mm.
- Chisel — impact only for channelling plaster and masonry, removing tile beds and trimming openings before pipe or conduit is set.
Brushless Motor, Protection and the 21V Platform
The brushless motor removes carbon brushes and the heat they generate, which matters on crews that run a hammer for a full shift. Overheat and overload protection cut the motor before windings are damaged, and the vibration-damping design reduces hand fatigue during extended operation.
Because the tool runs on our 21V platform, packs can be pooled with our other cordless tools. For high-consumption sites we also supply the Backpack Lithium Battery Pack — 20Ah/30Ah, Powers Multiple 21V-60V Tools Simultaneously, which keeps the hammer running while a second pack charges.
Chuck, Tooling and Accessory Scope
The SDS / round quick-change chuck lets one tool body cover SDS-shank masonry bits and round-shank tooling, which simplifies the bit stock a maintenance team has to carry. Confirm the shank type at order so the chuck configuration and the bit list match.
- Side handle fitted for two-hand control on all hammer and chisel work
- Depth gauge for repeatable anchor and sleeve depths across a run of holes
- Chisel bits, masonry drills and core bits quoted with the tool when a project package is specified
Configuration Across Our Rotary Hammer Range
Three rotary hammers cover the drilling and chiselling work we are asked for most often. Impact energy and chuck type decide which one goes into a crew's kit.
Handling, Site Safety and Installation Practice
The hammer is a hand-held tool, so safe output depends on how the crew sets up each hole. We brief these points at handover and repeat them in the operating documentation.
- Fit the side handle and hold the tool with both hands; never choke the barrel for one-hand drilling
- Set the depth gauge before a run of anchor holes so embedment depth stays consistent
- Start tile and glazed surfaces at low speed in drill mode, then switch to hammer action once the bit has bitten
- Check for embedded conduit, rebar and services before drilling into a wall
- Use dust extraction or wet suppression in occupied buildings; eye and hearing protection throughout
- Let the motor cool and the protection circuit reset before restarting after an overload cut-out
Quality Control, Documentation and Acceptance
Our Hangzhou factory covers 10,000m² with more than 100 employees, and the company holds National High-Tech Enterprise status with 30 patents across its threading and power tool lines. Incoming materials, assembly and finished goods are checked against specification before packing, and our published finished-product rate is 99.9%.
- Attestation of conformity referencing the Machinery Directive and the Electromagnetic Compatibility Directive in our certification file
- Function check of mode selector, variable speed, impact mechanism and protection circuit on each unit
- Live tool demonstration by a product expert before a fleet order is confirmed
- Operating manual, accessory list and packing list issued with the shipment
Information We Use to Configure Your Solution
A quotation for this hammer is only useful if it matches the work. These are the inputs that change the configuration, the accessory set and the packing.
| Project input |
How we use it |
| Base material, concrete grade or stone type |
Confirms whether 4.5J is the right energy class or whether the heavy-duty model suits better |
| Hole diameter, depth and fixing system |
Checks the 30mm ceiling, depth-gauge setting and drill bit list |
| Chisel work volume and channel width |
Sizes the chisel accessory set and the duty pattern |
| Crew size, shift length and holes per shift |
Sets unit quantity and the number of 21V packs quoted per tool |
| Existing battery platform and bit inventory |
Avoids duplicate packs and fixes the chuck configuration |
| Labeling, carton marking and manual language |
Drives packaging preparation and documentation |
| Demonstration or acceptance requirement |
Schedules the live demonstration and the acceptance checklist |
Maintenance, Spare Parts and Serviceability
Because the motor is brushless, routine maintenance is mechanical rather than electrical: chuck condition, switch and mode selector action, housing and handle integrity, and cooling vents kept clear of dust. We hold spare parts for our power tool range and supply replacement components against the model and serial reference on the tool.
- Clean the chuck and bit shanks at each shift change; worn shanks reduce impact transfer
- Inspect the side handle clamp and depth gauge rod for damage before hammer or chisel work
- Store packs away from heat and recharge according to the pack instructions
- Return tools with a fault description and model reference so we can match the correct spare
Frequently Asked Questions
What is this rotary hammer rated to drill?
It drills concrete and stone up to 30mm diameter, with 4.5J of impact energy at 0-5500bpm. Larger openings, pipe penetrations and steel work are handled by our dedicated drilling and hole punching equipment rather than by this hand-held tool.
Can speed and impact rate be adjusted for tile or brittle surfaces?
Yes. No-load speed is adjustable across 0-1200rpm and impact frequency across 0-5500bpm, so a crew can start a hole slowly in drill mode on tile or glazed block and move to hammer action once the bit has established a seat.
Does it take SDS-plus bits or round-shank tooling?
The tool is supplied with an SDS / round quick-change chuck, so both shank families can be used. Tell us which bit stock your crews already carry and we will confirm the chuck configuration and the matching accessory list in the quotation.
What happens if the tool is pushed too hard?
Built-in overheat and overload protection cuts the motor before the windings are damaged. The operator releases the trigger, lets the tool cool, and restarts; repeated cut-outs on the same hole usually mean the bit is blunt or the wrong mode is selected.
Which battery packs run this hammer?
It runs on our 21V lithium-ion platform, the same packs used across our cordless cutters, wrenches, grinders and punchers. For long shifts we can quote the backpack pack alongside the tools so one pack powers the tool while another charges.
How do we place a project order?
Send the base material, hole sizes and depths, chisel work volume, crew size, existing battery platform and packing or labeling requirements. We return a configuration with the tool, accessory set, pack quantity and documentation scope, and can arrange a live demonstration before the order is released.
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