Rim lock

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Detail photo of a silver-colored light alloy wheel with five spokes, which is mounted on the hub flange of a car with four commercially available hexagonal wheel bolts and a rim lock (bottom left), the head of which has a sawtooth-like clover-leaf profile with eight teeth, with no plastic wheel screw caps being attached, so that the screw heads are visible; the rim lock is marked with a red dashed circle to highlight it; Brand-specific features such as the logo in the center of the rim and the imprints in the heads of the wheel bolts were pixelated in the photo
Light alloy wheel, which is mounted on the hub flange of a car with four hexagon wheel bolts and a rim lock (circled in red) (plastic wheel bolt caps are not attached so that the screw heads are visible; brand-specific information has been pixelated in the photo)

A wheel lock , sometimes rim assurance , wheel lock , Radsicherungsbolzen , wheel bolts or star screw and English " wheel screw lock socket " or " wheel lock called" is a special wheel bolt or nut that can not tighten with standard hex-assembly tools not solve, but only with the appropriate special tool, the rim lock key , or key, referred to as. The keys are usually designed as adapters, which on one side fit the profile of the wheel lock and on the other side have a conventional external hexagon drive .

Structure and functionality

Ball flange rim lock and normal ball flange wheel bolt of size M14 x1.5 x 27 mm for comparison Ball flange rim lock and normal ball flange wheel bolt of size M14 x1.5 x 27 mm for comparison
Ball flange rim lock and normal ball flange wheel bolt of size M14 x1.5 x 27 mm for comparison

Rim locks differ from the hexagonal outer contour that is generally used with conventional wheel bolts and nuts . Rim locks (in screw form) therefore have a special form of (screw head) drive, but do not differ in terms of the thread compared to conventional wheel bolts and nuts . In principle, every wheel bolt or nut can be replaced with a suitable rim lock if desired.

There are a number of different special shapes, each with individual profiles and different dimensions.

The outer contour of rim locks is usually circular. In some rim locks, there is a ring on the outside of the head which is designed to be rotatable, but without the thread of the rim lock being able to rotate as well. This should also help to ensure that - apart from the right key - no tools (e.g. pliers , wheel lock dismantling sleeve, cutoff grinder , nut splitter , ...) succeed in opening the wheel lock.

key

Ball collar rim lock and associated key (adapter), the latter with 17 mm and 19 mm hexagon Ball collar rim lock and associated key (adapter), the latter with 17 mm and 19 mm hexagon
Ball collar rim lock and associated key (adapter), the latter with 17 mm and 19 mm hexagon

For loosening or tightening wheel locks, special tools that are not commonly used and that have to match the respective wheel locks and that are generally more difficult to obtain and more expensive than the usual hexagonal tools such as wheel bolts and nuts are not necessary. B. wrenches , especially socket wrenches , cross wrenches , ratchets or torque wrenches with a socket .

In order for a key to fit a certain wheel lock, the profiles of both elements must fit together in such a way that a form-fitting contact is created between the key and the wheel lock, which allows the wheel lock to be turned with the required torque applied .

activity

For actuation, it is also necessary during the application of torque to press the key axially against the rim lock with sufficient force. Otherwise it can happen that the positive contact breaks under load and the key or wheel lock is damaged. This danger arises in particular if the axis of rotation of the key (i.e. the torque applied) is not exactly aligned with the longitudinal axis of the rim lock, i.e. if the tool is positioned at an angle or wobbles when it is operated. Since the profile depth of many wheel locks is often only a few millimeters, this risk of slipping is usually greater than with conventional hexagonal wheel bolts or nuts; exact work is necessary.

use

Rim locks are preferred for higher Alloy - wheels used, but can also in trucks are used.

In some cases, manufacturers of wheel rim locks advise against tightening or loosening them with an impact screwdriver.

purpose

Rim locks are designed to protect the rims and tires from theft . Typically, a wheel rim is attached to the vehicle's hub flange using multiple wheel bolts or nuts . In order to protect against theft, it should be sufficient if at least one of these wheel bolts or nuts is designed as a rim lock.

Of course, this cannot prevent the remaining wheel bolts from being stolen instead.

trade

Wheel rim locks for cars are therefore usually sold in packaging units of four pieces per pack, so that a wheel lock is available for each of the four wheels.

Suitable assembly tools (wheel lock keys) are available from specialist retailers for the various profiles - e.g. B. Key sets with wheel lock adapters for hexagon sockets - available with which the associated wheel locks can be operated.

Removal of defective rim locks

There are several methods for removing defective rim locks, which in the ideal case can be used as universally as possible, i.e. in particular independent of the manufacturer and the individual rim lock profile and - apart from the affected rim lock - should not cause any further damage:

Dismantling sleeves

There are special wheel lock removal sets that can be used to remove defective wheel locks. The dismantling sleeves contained herein have a conventional (hexagonal) drive on the outside and are tapered on the inside . They are hit with a hammer on the defective rim lock in order to enable frictional power transmission and thus loosening. The disassembly sleeves are reusable, but are subject to a certain amount of wear from friction . With rim locks that have a freely rotatable ring on the outside, this method generally does not work because the thread cannot be rotated because of the ring despite the dismantling sleeve being opened.

Boring and removing with a mandrel

Special rim lock removal sets are also available for this method. A centering aid is hit with a hammer on the defective wheel lock so that it can guide a twist drill with which the wheel lock is then centered on the head about 1–2 cm deep. It is important to ensure that the drill hole is not too deep, because the rim lock must remain able to withstand the torsional forces that occur when unscrewing it without breaking. After removing the metal chips, a special mandrel is driven into the wheel lock with a hammer. The mandrel has a standard drive on one side (usually an external hexagon), and on the other side several driving teeth running in the longitudinal direction on the outside of the shaft , which transmit the torque that is axially applied to the mandrel to the rim lock; so the rim lock can be unscrewed. The drill hole diameter should be selected so that a press connection is created between the mandrel and the rim lock, i.e. on the one hand the shaft of the mandrel fits into it and on the other hand the driver teeth can be hammered in and find adequate support. To ensure this, the dismantling sets usually come with suitable drills. This method will destroy the wheel lock. The boring mandrel can - z. B. with a fork-like mandrel cutting tool - be knocked out of the turned wheel lock. The boring mandrels are thus reusable, although the driver teeth are subject to a certain amount of wear due to friction due to the pressing in and the torque transmission. This method should also with rim locks which outside have a freely rotatable ring work is, however, not applicable to locks with rim end hole when the end hole diameter is larger than the space required for the Ausdrehdorn diameter.

Left extractor

A left-hand extractor can be used to loosen and unscrew a defective wheel lock. For this purpose, the rim lock is drilled centered on the head with a twist drill, whereby the drill hole depth roughly corresponds to the drill hole diameter. The hole must be made in such a way that, on the one hand, the appropriate left-hand extractor can be applied and find sufficient hold and, on the other hand, the rim lock is not weakened too much so that it can withstand the forces that arise when unscrewing, in particular the torsional forces, without breaking. With this method, the rim lock is destroyed, the left-hand extractor normally not, but it is subject to a certain amount of wear and tear as a result of the frictional forces that occur. A left extractor can also be used if the head of the rim lock or the wheel bolt is torn off and only the threaded part is stuck.

Profiles

The profile of a rim lock used by the manufacturer can depend on the vehicle manufacturer , the vehicle model and / or the year of construction . The profiles can be roughly divided into the following profile types, whereby there are many different specific profile designs within a profile type:

  • "Shamrock" profiles
    • Audi : 20-piece assortment with the identifiers: 801, 802, 803, 804, 805, 806, 807, 808, 809, 810, 811, 812, 813, 814, 815, 816, 817, 818, 819, 820
    • BMW : 20-piece assortment with the identifiers: 041, 042, 043, 044, 045, 046, 047, 048, 049, 050, 051, 052, 053, 054, 055, 056, 057, 058, 059, 060
    • Mercedes-Benz : 10-piece assortment with the identifiers: 5A, 5C, 5D, 5E, 5F, 5G, 5L, 5N, 5P, 5X
    • Volkswagen (VW): 20-piece assortment with the identifiers: 521, 522, 523, 524, 525, 526, 527, 528, 529, 530, 531, 532, 533, 534, 535, 536, 537, 538, 539 , 540
  • "Multi-tooth" or "star" profiles
    • BMW: 20-piece assortment with the identifiers: (the number in front of "PT" indicates the number of teeth)
      • 10 key with end hole : 30 / 13pt, 31 / 15pt, 32 / 16pt, 33 / 17pt, 34 / 18PT, 35 / 19PT, 36 / 20pt, 37 / 21PT, 38 / 22PT, 40 / 23PT
      • 10 wrenches without holes: 11 / 15PT, 12 / 14PT, 13 / 16PT, 14 / 12PT, 15 / 11PT, 16 / 10PT, 17 / 7PT, 18 / 13PT, 19 / 8PT, 20 / 9PT
    • VAG vehicles: 22-piece assortment with the identifiers: (the number in front of "PT" indicates the number of teeth)
      • 12 wrenches with front hole: 51 / 6PT, 52 / 7PT, 53 / 8PT, 54 / 9PT, 55 / 10PT, 56 / 11PT, 57 / 12PT, 58 / 13PT, 59 / 14PT, 60 / 15PT, 61 / 16PT, 62 / 17PT
      • 10 keys without perforation: ABC0 / 10PT, ABC1 / 11PT, ABC2 / 13PT, ABC3 / 14PT, ABC4 / 15PT, ABC5 / 16PT, ABC6 / 17PT, ABC7 / 19PT, ABC8 / 20PT, ABC9 / 21PT

Note: This list is not exhaustive; there are other rim lock profiles.

See also

Individual evidence

  1. ↑ Sicurit | Rim locks. Retrieved on February 11, 2018 (German).
  2. ↑ a b Sicustar Silver | SicuLocks. Retrieved on February 11, 2018 (German).
  3. ↑ Search results - "wheel lock" - VIGOR EQUIPMENT. Retrieved February 11, 2018 .
  4. ↑ Sicutruck 2013 | Rim locks. Retrieved on February 11, 2018 (German).
  5. ↑ a b Rim lock range, BMW cloverleaf profile - VIGOR EQUIPMENT. Retrieved February 11, 2018 .
  6. ↑ a b Wheel lock range VW clover leaf profile - VIGOR EQUIPMENT. Retrieved February 11, 2018 .
  7. ↑ a b Rim lock range, BMW multi-tooth profile - VIGOR EQUIPMENT. Retrieved February 11, 2018 .
  8. ↑ a b Rim lock range, VAG multi-tooth profile - VIGOR EQUIPMENT. Retrieved February 11, 2018 .
  9. ↑ Compressed air & special tools / B.Rasche eK: Remove wheel lock tool | Automotive tools. Retrieved February 11, 2018 .
  10. ↑ KSTOOLSTOOLCHANNEL: Application video wheel lock removal set KS Tools 913.1480. May 31, 2013, accessed February 11, 2018 .
  11. ↑ "Lugdriller" drilling set for rim locks & wheel bolts. Retrieved March 25, 2018 .
  12. ↑ hansewerkzeug: Drilling set for rim locks & wheel bolts · Item no. 43673. July 3, 2017, accessed February 11, 2018 .
  13. ↑ diybook: Drilling out the screw: The left-hand extractor in action. August 25, 2017. Retrieved February 11, 2018 .
  14. ↑ Easy Steps: How To Remove Broken Lug Nut From Mercedes | Remove Broken Bolt with EZ Out Extractor Tool. May 23, 2016, accessed February 11, 2018 .
  15. ↑ Wheel lock range AUDI cloverleaf profile - VIGOR EQUIPMENT. Retrieved February 11, 2018 .
  16. ↑ Compressed air & special tools / B.Rasche eK: Wheel lock sockets for VAG or BMW | rs tools. Retrieved February 11, 2018 .
  17. ↑ Compressed Air & Special Tools / B.Rasche eK: Wheel lock Mercedes key set, 12- piece sockets.Retrieved on February 11, 2018 .
  18. ↑ Compressed air & special tools / B.Rasche eK: Feglenschloss sockets for VAG or BMW | rs tools. Retrieved February 11, 2018 .
  19. ↑ Compressed air & special tools / B.Rasche eK: Wheel lock dismantling inserts for BMW, 21 pieces. Retrieved February 11, 2018 .
  20. ↑ Compressed air & special tools / B.Rasche eK: Wheel lock dismantling inserts for VAG, 23 pieces. Retrieved February 11, 2018 .

Web links

Commons : Rim Locks  - Collection of images, videos and audio files