Dawei 20V brushless cordless impact wrench, 1/2" drive, 550N.m tightening, 650N.m max loosening, 3 speeds. 3.0Ah or 4.5Ah battery kits. OEM/ODM welcome.

Release date：2026-10-21 15:09

The Dawei 20V brushless cordless impact wrench is built for heavy-duty bolt and nut work. With 550N.m tightening torque, up to 650N.m loosening torque, a 1/2" (12.7mm) square drive and 3 speed settings, it handles scaffolding bolts, wheel nuts on cars, vans and tricycles, and other demanding fastening jobs without an air compressor or power cord. Choose between two kits: PB550-40 with 3.0Ah batteries or PB550-60 with 4.5Ah long-runtime batteries.

Key Features

550N.m tightening torque and 650N.m max loosening torque: strong enough for large bolts and stubborn, rusted fasteners.
Brushless motor, 550W rated power: higher efficiency, longer service life and less maintenance than brushed motors.
3 speed settings: 1,800 / 2,600 / 3,200 rpm with impact rates of 2,600 / 3,000 / 3,500 bpm, so you can match the speed to the job, from careful tightening to fast removal.
Wide bolt range: standard bolts M12–M24 and high-strength bolts M10–M16.
1/2" (12.7mm) square drive: works with common 1/2" impact sockets, 14–24mm recommended.
Forward/reverse switch: switch direction quickly with one hand for tightening or loosening.
20V lithium battery platform: every kit includes 2 batteries and a charger, so one battery can charge while the other works.
Ergonomic grip: textured handle for secure control during high-torque work.
Medium plastic carry case: protects the tool in transport and storage.

Technical Specifications & Model Comparison

Specification	PB550-40	PB550-60
Motor	Brushless	Brushless
Tightening torque	550N.m	550N.m
Max loosening torque	650N.m	650N.m
Impact frequency	2,600 / 3,000 / 3,500 bpm	2,600 / 3,000 / 3,500 bpm
Rated power	550W	550W
Rated speed	1,800 / 2,600 / 3,200 rpm	1,800 / 2,600 / 3,200 rpm
Standard bolts	M12–M24	M12–M24
High-strength bolts	M10–M16	M10–M16
Square drive	12.7mm (1/2")	12.7mm (1/2")
Recommended socket range	14–24mm	14–24mm
Battery (included)	2 × 20V 3.0Ah	2 × 20V 4.5Ah (long runtime)
Charger (included)	20V 0.6A corded charger	20V 1.5A desktop charger
Packaging	Medium plastic case	Medium plastic case

Which Model Should You Choose?

PB550-40 (2 × 3.0Ah, 0.6A charger): the standard kit for general repair, installation and occasional heavy-duty work, and a cost-effective choice for distributors.
PB550-60 (2 × 4.5Ah, 1.5A desktop charger): the same tool with larger batteries and faster charging, for longer working time and daily professional use.

Approximate battery energy: 3.0Ah ≈ 60Wh and 4.5Ah ≈ 90Wh per battery (20V × Ah). Actual runtime depends on bolt size, speed setting and operating habits.

What's in the Box

1 × 20V brushless cordless impact wrench
2 × 20V lithium batteries (3.0Ah or 4.5Ah, depending on model)
1 × charger (0.6A corded or 1.5A desktop, depending on model)
1 × medium plastic carry case

Sockets are not included unless agreed in your order. Please use impact-rated sockets.

Applications

Construction scaffolding assembly and dismantling
Removing and installing wheel nuts on cars, vans and tricycles
Dismantling bolts on vehicles and small trucks
Steel structure and equipment installation
Auto repair shops, tire shops, maintenance and roadside work

OEM / ODM & Wholesale Supply

Dawei Metal is a hardware tools manufacturer and exporter based in Jinan, Shandong, China. We supply this cordless impact wrench to distributors, brand owners and wholesalers in Europe, America, Southeast Asia and the Middle East. We can discuss custom logo, color, battery configuration and packaging. Contact us for MOQ, sample and price information.

Frequently Asked Questions

What torque does this impact wrench deliver?

Tightening torque is 550N.m and the maximum loosening (breakaway) torque is 650N.m.

What bolt sizes can it handle?

Standard bolts M12–M24 and high-strength bolts M10–M16. We recommend 1/2" impact sockets from 14mm to 24mm.

Can it remove car wheel nuts?

Yes. It is suitable for wheel nuts on cars, vans and tricycles. Choose the correct impact socket size for your vehicle.

What is the difference between PB550-40 and PB550-60?

The tool is the same. PB550-40 includes two 20V 3.0Ah batteries and a 0.6A charger. PB550-60 includes two 20V 4.5Ah batteries for longer runtime and a 1.5A desktop charger.

Does the kit include batteries and a charger?

Yes. Each kit includes two 20V lithium batteries and one charger, packed in a medium plastic case.

Can I order with my own brand or custom packaging?

Yes. OEM/ODM orders are welcome. Please send us your requirements for logo, color and packaging.

Get a Quote

Tell us the model, quantity and destination country, and we will reply with pricing and lead time.

WhatsApp / Tel: +86 156 6628 5386
Email: dwhardwaretools@gmail.com
Send an inquiry online

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