A fork is quick; a press keeps the boot alive
There are two families here and they do the same job differently. A fork separator is driven in with a hammer: fast, cheap, and it tears the rubber boot, which is fine when the joint is being replaced and expensive when it is not. A press or scissor separator pushes the taper out under screw pressure and leaves the boot intact, which is the whole argument for owning one. The specification to check is the jaw opening and reach against the joint you actually have — separators are sized, and the one in the combination kit is rarely the size on your car. We compare design, jaw opening and clamping range, adapters, material and stated use. Only two of these listings give a jaw figure at all, and none gives a rated capacity.
18 mm (0.71 in) and 20 mm (0.79 in) separators · protective adapter for aluminum parts · forged Cr-V, oil-hardened stated
Two press-type separators in 18 and 20 mm (0.79 in), with a protective adapter for aluminum components — the detail that separates a tool from a hammer.
Best for: A single suspension job on a car whose joints are 18 or 20 mm (0.79 in).
20–22 mm (0.79 to 0.87 in) jaw opening · clamping range lockable at 30 and 55 mm (2.17 in) · forged · 1210 g (42.7 oz) stated
A single forged separator with its jaw opening, clamping positions and weight all published — the sort of specification a trade catalog provides and a marketplace listing does not.
Best for: A known job on a known car, where the size has already been measured.
≈ $85
10 pieces · C-frame press · installation and removal adapters · stated for 1/2 and 3/4 ton 4WD with Dana 44 front axle
A C-frame press rather than a separator: it removes and refits ball joints in the arm, which is a different job from splitting a taper.
Best for: Replacing pressed-in ball joints rather than separating them.
≈ $39
3 separators · jaws 22–18, 19.5 and 19 mm (0.75 in) · clamping to 25/55 mm and 20–50 mm (0.79 to 1.97 in) · M16 × 1.5 and M12 × 1.75 threads stated
Three separators with every dimension published — jaw opening, clamping range, drive size and thread pitch for each of the three.
Best for: Someone working on several cars who wants coverage and published dimensions.
5 adjustable tools · ball joint splitter, track rod separator and more · hardened alloy stated · carry case
A five-piece front-end service kit rather than a single separator: five adjustable tools in a case, aimed at doing a whole suspension corner.
Best for: A complete front-end job where you would rather have five tools than measure first.
A complete set covers the various sizes of ball joints and track rod ends. A single puller only suits one geometry.
A twenty-millimeter separator will not go over a van's ball joint. The stated opening range is compared with the part, not with the vehicle's class.
A fork in soft steel twists before the joint lets go, and the tool goes in the bin. The stated steel grade, hardened or not, decides the number of jobs it survives.
No: leaving it at the end of the thread restrains the part when the taper releases violently. It is the central precaution of the operation.
The screw preserves the part and the boot; the fork is quicker and destroys the boot. What happens to the part decides.
Put the puller under tension, then strike a sharp blow on the hub carrier beside the taper. The shock often frees what force alone does not.
That destroys the thread and the part. Striking beside the taper, on the solid section, is the correct technique.
Applied in advance and left to work, it genuinely helps. On a taper the effect stays modest: it is an interference fit.
Many ball joint nuts are self-locking and single-use. Reusing them is a saving made in the wrong place on a steering component.
Any work on the steering or suspension calls for a wheel alignment check. It is a consequence, not an option.
Yes, nearly always: it tears the rubber as it goes in. Keep it for parts you are replacing, and use a screw-type puller when the joint has to be reused.
Leave the nut at the end of the thread: the taper releases violently and the part has to be restrained. Strike beside the taper and never on the ball joint, replace self-locking nuts — and any work on the steering makes an alignment check compulsory.
There is no table here, and the reason is in the listings. The figure published most often across these 5 products is set, given by 3 of them — short of the four in five a column needs to compare rather than to display gaps. Each product page says what its own maker published.
Specifications: manufacturer sheets for garage tools and the matching Amazon product pages. Prices and availability: Keepa.
Most recent revision in this category: September 4, 2026.
