The JCB 4263‑5MPB (64920) 26‑piece impact socket set is designed for professional mechanics, workshops, and users of impact tools. The kit features 1/2″ drive, 6‑point impact sockets in sizes from 8 mm to 32 mm, made from Cr‑Mo steel for strength under high torque. All pieces are housed in a durable metal case for protection and portability.
Features
:- Cr‑Mo Impact‑Rated Construction : Built to withstand high torque and repeated use with impact wrenches.
- 6‑Point Design : Provides a solid grip on fasteners and reduces rounding or slipping.
- Wide Size Range (8–32 mm) : Covers many common nuts and bolts sizes in automotive and industrial work.
- Metal Case : Protects tools from damage, ensures organized storage, and is more durable than plastic in heavy-duty environments.
- Complete Set : With 26 pieces, you get a good balance of sockets plus useful accessories (extensions, adapters) to tackle a variety of tasks.
Accessories
:- 1/2″ drive sockets: e.g. 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 24, 27, 30, 32 mm (a subset covering 26 pieces or combination of sockets + adapters)
- Extensions, universal joints or adapters as part of the 26 items
- The metal storage case
Applications
:1. Automotive / Vehicle Repair :
Removing and tightening various bolts and nuts on cars, trucks, motorcycles (e.g. wheel lug nuts, suspension bolts, engine mounts)
2. Heavy Equipment & Machinery Maintenance :
Servicing industrial machines, construction equipment (excavators, loaders, etc.)
3. Agricultural / Farm Machinery :
Repairs on tractors, agricultural implements, harvesters
4. Construction & Structural Work :
Fastening structural bolts, anchor bolts, frame assemblies
5. Workshop & Garage Use :
General mechanical work, fabrication, maintenance tasks
6. Industrial / Plant Maintenance :
Equipment servicing in factories, assembly lines, plant equipment
Usage
:User Instructions :
1. Identify the Right Socket Size
- Look at the bolt or nut you're working on.
- Measure it (or use a socket gauge) to find the correct metric size (e.g. 17 mm, 24 mm, etc.).
- Choose the matching socket from the set.
The set includes sizes from 8 mm to 32 mm, covering most common fasteners in automotive, industrial, and construction applications.
2. Attach the Socket to Your Tool
- Push the socket onto the 1/2" square drive of your chosen tool :
- Impact wrench: for high-torque applications (e.g. wheel nuts, suspension bolts)
- Torque wrench: for accurate tightening
- Breaker bar: for manually loosening tight bolts
- Ratchet: for general use
- Ensure it clicks in securely and does not wobble.
3. Position the Socket on the Fastener
- Align the socket directly over the bolt/nut.
- Ensure the socket fits fully and snugly onto the fastener.
- The 6-point design helps grip the flat sides of the nut (reducing rounding).
4. Turn the Fastener
To loosen :
- Rotate counter-clockwise (lefty-loosey).
- Use an impact wrench or breaker bar for stubborn bolts.
To tighten :
- Rotate clockwise (righty-tighty).
- Use a torque wrench if specific torque is required (e.g. lug nuts: 90–120 Nm).
- Avoid over-tightening with an impact wrench.
5. After Use
- Clean the socket with a dry or lightly oiled cloth.
- Inspect for damage (especially after heavy use).
- Return the socket to its metal storage case to prevent loss or damage.
Maintenance :
1. Clean After Every Use
- Wipe each socket with a clean, dry cloth to remove :
- For heavy grime or oil, use a mild degreaser or brake cleaner — then dry completely with a cloth.
2. Inspect for Damage
- After every few uses, check for :
- Cracks or chips, especially on the drive end or hex opening
- Deformation or rounding of corners (can cause slippage)
- Rust or corrosion, especially on the inner faces
Damaged sockets should be replaced immediately to prevent injury or damage to fasteners.
3. Apply Light Oil to Prevent Rust
- Use a light machine oil or rust inhibitor on each socket to prevent oxidation — especially if you store the set in a humid area.
- Apply a very thin coat and wipe off excess with a cloth.
Important if you're in a coastal or high-humidity environment.
4. Use With Proper Tools Only
- Always use sockets with impact-rated tools (impact wrench, breaker bar, torque wrench).
- Avoid using these sockets on non-impact or manual ratchets for high-torque work — doing so may crack or damage the socket.
5. Store Properly
- Return sockets to the metal case after use.
- Ensure the case is kept :
- In a dry place
- Away from direct water or moisture
- Closed securely to prevent dust or rust
Proper storage keeps sockets organized and protects them from knocks or damage.
6. Avoid Over-Torquing
- Don’t exceed the torque rating of the sockets.
- Use a torque wrench for final tightening when needed (especially on critical bolts like wheel nuts or suspension components).