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Expert Help & Advice

Spanners

JCB slogging spanners are the choice when standard ring spanners cannot generate enough torque. Made from chrome vanadium steel with a single-ring head designed to be struck with a hammer, the range covers 24mm through to 90mm — the sizes found on agricultural machinery hubs, construction plant, industrial pipework and heavy structural steelwork. All carry a lifetime JCB warranty (terms apply). The striking face is machined flat for consistent hammer contact and the ring profile is precision-formed to grip fasteners firmly without rounding under high impact torque.

11 products

JCB 27mm Single Ring Slogging Spanner, Cr-V Steel | JCB-79327

Spanners

27mm Single Ring Slogging Spanner, Cr-V Steel | JCB-79327

JCB-79327

Regular price £15.99
Sale price £15.99 Regular price
JCB 30mm Single Ring Slogging Spanner Tools, Cr-V Steel | JCB-79330

Spanners

30mm Single Ring Slogging Spanner Tools, Cr-V Steel | JCB-79330

JCB-79330

Regular price £16.99
Sale price £16.99 Regular price
JCB 34mm Single Ring Slogging Spanner, Cr-V Steel | JCB-79334

Spanners

34mm Single Ring Slogging Spanner, Cr-V Steel | JCB-79334

JCB-79334

Regular price £9.99
Sale price £9.99 Regular price
JCB 50mm Single Ring Slogging Spanner, Cr-V Steel | JCB-79350

Spanners

50mm Single Ring Slogging Spanner, Cr-V Steel | JCB-79350

JCB-79350

Regular price £20.99
Sale price £20.99 Regular price
JCB 60mm Single Ring Slogging Spanner, Cr-V Steel | JCB-79360

Spanners

60mm Single Ring Slogging Spanner, Cr-V Steel | JCB-79360

JCB-79360

Regular price £25.99
Sale price £25.99 Regular price
JCB 75mm Single Ring Slogging Spanner, Cr-V Steel | JCB-793754

Spanners

75mm Single Ring Slogging Spanner, Cr-V Steel | JCB-79375

JCB-79375

Regular price £41.99
Sale price £41.99 Regular price
Slogging Box End Striking Ring Wrench Spanner Bi-Hex

Spanners

80mm Single Ring Slogging Spanner, Cr-V Steel | JCB-79380

JCB-79380

Regular price £49.99
Sale price £49.99 Regular price
JCB 85mm Single Ring Slogging Spanner, Cr-V Steel | JCB-79385

Spanners

85mm Single Ring Slogging Spanner, Cr-V Steel | JCB-79385

JCB-79385

Regular price £64.99
Sale price £64.99 Regular price
Optimised working surface: Engineered for impact applications, maximising force on tight fasteners.

Spanners

90mm Single Ring Slogging Spanner, Cr-V Steel | JCB-79390

JCB-79390

Regular price £69.99
Sale price £69.99 Regular price
JCB 24mm Single Ring Slogging Spanner, Cr-V Steel | JCB-79324

Spanners

24mm Single Ring Slogging Spanner, Cr-V Steel | JCB-79324

JCB-79324

Regular price £14.99
Sale price £14.99 Regular price
JCB 36mm Single Ring Slogging Spanner, Cr-V Steel  | JCB-79336

Spanners

36mm Single Ring Slogging Spanner, Cr-V Steel | JCB-79336

JCB-79336

Regular price £12.99
Sale price £12.99 Regular price

Buying Guide

Slogging spanners work by concentrating hammer impact into rotational force on a fastener. The technique is straightforward: position the ring firmly on the nut or bolt head, hold the handle securely with one hand, and strike the striking face with a club or lump hammer using controlled blows — always wear eye protection. Use penetrating oil on seized fasteners and allow it to soak before attempting removal. Match the spanner size precisely to the fastener — undersized will rock and slip; oversized will round the corners. For agricultural work, the 30-55mm range covers most hub, PTO and hydraulic fitting sizes. For construction plant, 55-90mm is common on track links and structural connections. Never use a standard claw hammer — always a club or lump hammer.

Frequently Asked Questions

Do JCB slogging spanners carry a warranty?

Yes. JCB slogging spanners carry a lifetime JCB warranty, reflecting the quality of the chrome vanadium steel construction. Terms and conditions apply — see individual product pages for full warranty details.

What is a slogging spanner and how is it used?

A slogging spanner is a heavy single-ring spanner designed to be struck with a hammer to generate very high torque on large or seized fasteners. Position the ring firmly on the fastener, hold the handle securely, and strike the flat striking face with a club hammer. Always wear eye protection.

What sizes of JCB slogging spanners are available?

JCB slogging spanners are available from 24mm to 90mm: 24, 27, 30, 34, 36, 50, 60, 75, 80, 85 and 90mm. The range covers the majority of large fasteners found on agricultural machinery, construction plant and industrial equipment.

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