Spanner sets

Spanner sets serve the needs of tightening and loosening bolts and nuts across many fields from mechanical maintenance, automotive repair to industrial equipment assembly. This product group includes combination spanners, double open-end spanners, double ring spanners, tubular socket spanners and torque spanners with a diverse size range from 6mm to 50mm, meeting most common bolt sizes. Models such as 0073, 0546, 0221 and 0200 comply with DIN 3113 Form A standard, ensuring dimensional accuracy and stable load-bearing capacity. The main manufacturing material is Chrome Vanadium steel with a satin chrome or mirror-polished surface, providing high hardness and corrosion resistance in regular working environments. Some specialized lines use copper beryllium alloy such as TNO.BCB, TNO.ACB and TNO.CCB that do not generate sparks, suitable for flammable and explosive environments. The sets are usually stored in hanging racks, roll-up canvas pouches or plastic boxes with separate compartments, facilitating storage and quick retrieval during use.

Classification by wrench head type

Combination spanners integrate two functions in one tool, one closed ring end and one open jaw end of the same size. The ring end allows continuous tightening without removal, suitable when working space limits rotation angle. The open end provides quick access to bolt positions from the side, convenient when placement from above is not possible. Models 0073, 0546, 0208 and 0223 provide from 12 to 25 pieces with size range 6-32mm, meeting most routine maintenance needs.

Double open-end spanners have two open jaws with different sizes on the same handle, optimizing the number of tools to carry. The jaw angle is typically 15°, helping access bolts in tight positions and increasing work efficiency. Sets 0221 and 0200 comprise 8 pieces from 6x7mm to 20x22mm complying with DIN 3113 Form A. The 112310 and 112312 lines from CIMCO meet DIN 3110 and ISO 3318, providing 8 to 12 pieces from 6mm to 32mm for industrial applications.

Double ring spanners use two closed ends with different sizes, allowing continuous tightening and more even force transmission compared to open ends. The deeply curved handle design at 75° as on 112432 creates better working clearance in deep positions. Model 0476 comprises 12 pieces from 6x7mm to 30x32mm complying with DIN 838, while 0477 with 8 pieces 6-22mm has a raised panel design suitable for protruding bolts. The 112430 and 112432 lines use 12-point ring ends, increasing contact points and reducing the risk of rounding bolt corners.

Specialized product lines

Tubular socket spanners for spark plugs such as 0540S comprise 9 pieces from 6-22mm with a ratchet handle, manufactured from Chrome Vanadium with satin chrome plated surface. The socket end is specially designed for engine spark plugs, allowing deep access into spark plug wells without damaging the ceramic insulator. The dedicated storage pouch has numbering on each size, facilitating quick identification during work.

Torque spanner sets provide precise torque control capability, necessary for applications requiring standard tightening force. Set 0803-S210 comprises 11 pieces from 13-30mm with torque range 15-80 Nm and accuracy ±4%, complying with ISO 6789-2017. Model 0803-S080 has 8 open-end inserts 17-30mm, suitable for automotive maintenance and mechanical equipment assembly requiring standard torque.

Non-sparking spanners use copper beryllium or aluminum bronze alloy that do not generate sparks upon impact, meeting safety requirements in flammable and explosive environments such as chemical plants and fuel depots. Sets TNO.BCB, TNO.ACB and TNO.CCB provide from 9-13 pieces with hardness 25-30 HRc and tensile strength 782-989 N/mm². The AlCu12BSR line in aluminum bronze includes common sizes 6-24mm.

Technical standards and materials

DIN 3113 Form A standard specifies dimensions, tolerances and mechanical requirements for combination spanners, ensuring compatibility with standard bolt types. Models 0073, 0546, 0221 and 0200 comply with this standard. DIN 838 applies to double ring spanners such as 0476 and TNO.CCB, specifying tilt angle and ring wall thickness.

DIN 3110 and ISO 3318 standards apply to double open-end spanners, specifying jaw angle and load-bearing capacity. CIMCO sets 112310 and 112312 meet both these standards. ISO 6789-2017 specifies requirements for hand torque tools, applying to 0803-S210 and 0803-S080 with accuracy ±4%.

Chrome Vanadium steel is the primary material for most standard spanner lines, providing high hardness and good wear resistance. The satin chrome plated surface on 0208, 0223 and BSR1224 resists corrosion and reduces light reflection. Some premium lines such as 0199 have a mirror-polished surface, enhancing aesthetics and ease of cleaning.

Selection by size range

8-12 piece sets are suitable for basic maintenance needs with the most common sizes. Models 0073, 0546, 0221 and 0200 provide 8-12 pieces from 6-22mm, meeting most bolts on household equipment and motorcycles. The 0187 line comprises 8 pieces 8-19mm focusing on the medium size range, suitable for electronics and light mechanical repair.

17-25 piece sets provide continuous size range, minimizing missing sizes during work. Model 112500 comprises 17 pieces from 6-22mm complying with DIN 3113A, while 0544, 0208 and 0223 provide 25 pieces from 6-32mm. Set BSR22627 has 22 pieces from 6-27mm in a canvas pouch, convenient for mobile mechanics.

Large size sets serve heavy industrial applications and large equipment maintenance. Model 0204 comprises 6 pieces 34-50mm with long pattern design, creating greater leverage and reducing force required during tightening. The 112312 line provides 12 pieces from 6-32mm, covering both small and large sizes in one set.

Measurement systems and applications

The metric system is the most common measurement system in Vietnam, applied to most domestically manufactured equipment and vehicles. Metric spanner sets such as 0073, 0546, 0208 and 0223 provide sizes from 6mm to 50mm, suitable for automotive, motorcycle, industrial equipment maintenance and mechanical assembly.

The inch system applies to equipment imported from the USA and some international industrial machinery lines. Set 0199P comprises 13 inch system pieces complying with DIN 3113 with long design, suitable for applications requiring greater leverage. The T135ACB Set line comprises 11 inch system pieces in Cu-Be alloy, serving flammable and explosive environments with imported equipment.

Automotive maintenance applications require spanner sets with a wide size range from 8mm to 24mm, including common sizes for engine bolts, suspension systems and brakes. Models 112500, 0544 and BSR1224 meet this need. Torque spanners such as 0803-S210 are necessary for tightening wheel bolts and cylinder heads to standard torque.

Storage and effective use

Selecting the correct spanner size for each bolt type helps avoid rounding corners and extends tool life. The ring end should be prioritized when possible as it distributes force more evenly than the open end. The open end should only be used when space does not allow placement from above or when quick access is needed. Avoid using spanners as hammers or levers as this may cause deformation or cracking.

Storage in canvas pouches, hanging racks or plastic boxes helps avoid impact and corrosion between pieces. Sets 0544, 0223 and BSR22627 come with roll-up canvas pouches with separate compartments, convenient for carrying and storage. After use, oil, grease and dirt should be wiped clean, and storage should be in a dry place to prevent rust.

Periodically check wear on the wrench head, especially the contact angle with bolts. If deformation or excessive wear is detected, replacement is needed to ensure safety and work efficiency. Torque spanners such as 0803-S210 and 0803-S080 require periodic calibration according to ISO 6789-2017 to maintain ±4% accuracy. Torque spanners should not be adjusted to the lowest value after each use to reduce spring fatigue.

This product group provides comprehensive solutions for many needs from basic maintenance to specialized industrial applications. Selecting the appropriate set based on size range, wrench head type and working environment helps optimize performance and ensure safety during use.