JCB Pro 18V 620Nm Impact Wrench Review - JCB-18PIW-620
400Nm working, 620Nm nut-busting, stepped torque control - £130 bare or £310 in the farm-ready PKIT-5 with the grease gun. Plus the honest answer on whether you need it over the £89.99 350. 4.5/5.
Key takeaways
- The honest framing: its £89.99 sibling, the 350, already covers most car and DIY duty; the 620 is for the farm, scaffold, plant and workshop crowd whose bolts genuinely fight back.
- Impact wrench marketing loves the big number, so credit to JCB for publishing both: 400Nm is what this wrench fastens and drives with; 620Nm is the hammering peak it applies to crack a stuck fastener loose .
- The 3+1 arrangement, 200/300/400Nm steps plus the breakaway mode, with digital 3-speed control and a variable trigger is what lets one tool run down a wheel nut politely and murder a seized pivot bolt an hour later.
- The honest advice hasn't changed since our 350 review: for seasonal wheel swaps and home-workshop duty, the 350 at £89.99 remains the value pick - 350Nm defeats the wheel nuts of ordinary life.
- Given 5.0Ah packs sell at £54.98 each and the charger at £19.99, the bundle arithmetic works the way JCB's kits reliably do.
Our Rating
JCB Pro 18V 620Nm Impact Wrench Review - JCB-18PIW-620
POWER TOOLS › JCB Pro 18V › Reviews
JCB Pro 18V 620Nm Impact Wrench Review (JCB-18PIW-620) - and How It Compares to the 350
By Mark Moore, Power Tools Editor · Updated 23 July 2026 · 10 min read
⚡ Quick Verdict - 4.5/5
400Nm of working torque, 620Nm of breakaway, digital 3-speed control and stepped torque settings (200/300/400Nm + breakaway) for £130 body-only - serious half-inch wrench numbers at a price the big brands don't visit. The honest framing: its £89.99 sibling, the 350, already covers most car and DIY duty; the 620 is for the farm, scaffold, plant and workshop crowd whose bolts genuinely fight back. For them, the £310 PKIT-5 bundle with the grease gun and two 5.0Ah batteries is the smartest maintenance kit in JCB's whole range.
When we reviewed the JCB-18PIW-350, the verdict was "nut-busting bargain". JCB has since added a bigger sibling: the JCB-18PIW-620, a ½" square-drive wrench pitched at mechanics, builders, scaffolders and agricultural users, the buyers for whom 350Nm occasionally meets a bolt that laughs at it. This review covers what the extra money buys, and just as important who shouldn't spend it.
(Platform context in our Pro 18V buying guide.)
Specifications
| Model | JCB-18PIW-620 |
| Motor | 18V brushless |
| Working torque | 400Nm (fastening) |
| Max / breakaway torque | 620Nm |
| Settings | 3+1: 200 / 300 / 400Nm + breakaway (620Nm); digital 3-speed control |
| Drive | ½" square drive with friction ring |
| Controls | Variable-speed trigger, reverse mode, LED light |
| Warranty | 3 years tool / 2 years batteries (subject to terms) |
| Price | £130 body-only · £310 in PKIT-5 (with grease gun, 2× 5.0Ah, charger, bag) |
Torque literacy: working vs breakaway
Impact wrench marketing loves the big number, so credit to JCB for publishing both: 400Nm is what this wrench fastens and drives with; 620Nm is the hammering peak it applies to crack a stuck fastener loose. When comparing wrenches across brands, compare like with like, a rival's headline figure may be either. In practice the split is exactly what you want: 400Nm working torque runs down scaffold fittings, plant bolts and trailer hardware briskly, and the breakaway reserve is for the corroded, over-torqued and thread-locked fasteners that define farm and recovery work.
Control that prevents carnage
620Nm without control is a stud-snapper. The 3+1 arrangement, 200/300/400Nm steps plus the breakaway mode, with digital 3-speed control and a variable trigger is what lets one tool run down a wheel nut politely and murder a seized pivot bolt an hour later. The ½" drive wears a friction ring for quick socket swaps (use impact-rated sockets only - chrome sockets shatter), and the brushless motor, LED and reverse round out a spec with no obvious gaps. One professional habit this power demands: final-tighten wheel nuts and critical fasteners with a calibrated torque wrench, an impact wrench removes and runs down; the click wrench finishes. JCB sells those too, which is either convenient or knowing, depending on your mood.
620Nm or 350N,? The honest split
| JCB-18PIW-350 | JCB-18PIW-620 | |
|---|---|---|
| Torque | 350Nm | 400Nm working / 620Nm breakaway |
| Price (bare) | £89.99 | £130 |
| Best for | Car DIY, MOT-season wheel swaps, general workshop | Agricultural, scaffolding, plant, recovery, daily trade use |
| Our rating | 4.4/5 | 4.5/5 |
The honest advice hasn't changed since our 350 review: for seasonal wheel swaps and home-workshop duty, the 350 at £89.99 remains the value pick - 350Nm defeats the wheel nuts of ordinary life. The £40 step to the 620 buys headroom that matters when fasteners live outdoors, carry thread-lock, or were last touched by someone with an air gun and no conscience: farms, scaffolds, plant yards, trailers. If you're reading the "best for" row and recognising your week, you already know which you are.
The JCB-18PKIT-5 angle: the maintenance kit
For the agricultural and plant audience there's a purpose-built bundle: JCB-18PKIT-5 (£310) pairs this wrench with the JCB-18PGG-VS grease gun we've reviewed, two 5.0Ah E-TECH batteries, the fast charger and a heavy-duty bag - effectively the cordless service kit for anyone maintaining tractors, mowers, plant and machinery. Given 5.0Ah packs sell at £54.98 each and the charger at £19.99, the bundle arithmetic works the way JCB's kits reliably do. It's the natural companion purchase for readers of our machinery maintenance guides.
✔ Pros
Honest dual torque ratings (400 working / 620 breakaway) · stepped settings prevent stud-snapping · friction-ring ½" drive · £130 undercuts comparable big-brand wrenches · PKIT-5 is a superb farm/plant bundle · 3yr warranty + Loxa insurance direct
✘ Cons
Overkill (and £40 dearer) for ordinary car DIY — the 350 exists for a reason · demands 5.0Ah packs for proper runtime · impact-rated sockets are an extra if you don't own them
🏆 Mark's Verdict — 4.5/5
The 620 does what its little sibling did - serious wrench numbers at a price that embarrasses the establishment - one weight class up, with honestly published torque figures and the control to use them safely. Ordinary drivers should save £40 and buy the 350. Everyone whose bolts live outdoors should buy this, ideally inside PKIT-5.
About the Author
Mark Moore covers power tools and workshop equipment for Garden Review, with a focus on cordless platforms and trade value. His reviews are based on detailed product research, specification analysis and verified owner feedback rather than manufacturer claims.
Garden Review is reader-supported. Links to JCB Tools on this page are affiliate links - we may earn a commission on qualifying purchases at no extra cost to you. This does not influence our advice or ratings. Prices verified July 2026 and subject to change. Always use impact-rated sockets and final-torque critical fasteners with a calibrated torque wrench.
Frequently Asked Questions
Tags
Comments
Join the conversation
Create a free account to leave comments, share photos, and connect with other gardeners.