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Zhonggong Electric Lifting Hydraulic Puller: Tonnage, Jaw Type and Reach
Most people shopping for zhonggong electric lifting hydraulic puller are comparing prices when they should be comparing specifications. The difference between two options in this range is usually one dimension, and that one dimension is what decides whether the item does the job or sits in a drawer.
There are 16 options here, from $714.25 at the entry level to $2142.75 at the top. The spread is wide enough that the right answer is usually one specific option rather than the cheapest or the dearest.
What decides how a zhonggong electric lifting hydraulic puller performs
Two of the factors below matter more than the rest, but which two depends entirely on the job. Read the whole table before deciding which rows to ignore.
| Factor | What it changes | Typical choices |
|---|---|---|
| Rated tonnage | The force the tool develops, and the figure that decides whether the part actually yields. | 5 t / 10 t / 20 t / 30 t |
| Jaw or spreader type | Two-jaw, three-jaw and flange spreader each grip a different shape. | 2-jaw / 3-jaw / spreader |
| Drive | Manual, integral hydraulic and separate pump station trade speed against access. | Manual / integral / split |
| Reach and opening | Jaw length and spread decide what the tool can get behind. | 100 mm / 200 mm / 300 mm |
| Material and hardening | Forged and alloy jaws resist the point loads that crack a cast one. | Forged steel / alloy steel / cast |
Once the deciding figures are clear, the rest of the choice is about how the item is used rather than what it is. A specification that suits daily trade use is wasted on occasional domestic work, and the reverse is worse.
Puller and spreader types
The table below sets out the main types side by side with the compromise each one makes. Every design is a trade, and knowing the trade is what stops an expensive mistake.
| Type | Grips | Best for |
|---|---|---|
| Two-jaw puller | Two opposite points on the rim | Bearings with little room behind |
| Three-jaw puller | Three points, evenly loaded | Tight bearings that resist a two-jaw pull |
| Flange spreader | Between two flange faces | Breaking a joint without marking the faces |
| Hydraulic punch | Through sheet and angle | Holes where a drill will not fit |
Pulling a bearing without damaging it
In use, the sequence matters as much as the tool. The steps below are the ones that decide whether the result is repeatable or a one-off success.
| Step | What to do | Why |
|---|---|---|
| Centre the screw | Line the forcing screw up with the shaft | An off-centre pull walks the bearing sideways |
| Seat the jaws | Get the jaws fully behind the part | Half a jaw grip bends the jaw and slips |
| Load it evenly | Take up the slack, then apply force steadily | Shock loads are what break jaws |
| Stop at the limit | If it will not move, add heat rather than tonnage | Force beyond the rating breaks the tool, not the fit |
Zhonggong Electric Lifting Hydraulic Puller in this range
This is the item described above, listed with its current options and price.
Every option in this range
Below is the complete set of options and prices, ordered so the step between each one is visible.
| Part of the range | Price | Options | Notes |
|---|---|---|---|
| Lower third of the range | $714.25 to $1700.23 | 5 options | The sizes most buyers start with |
| Middle third of the range | $1989.42 to $2142.75 | 5 options | Where most of the value sits |
| Upper third of the range | $2142.75 to $2142.75 | 6 options | For heavy or continuous work |
The pattern is consistent: the cheapest option does the basic job, the middle of the range adds the flexibility most buyers actually want, and the top option exists for continuous trade use.
Prices and what the money buys
Price in this range tracks specification, but not in a straight line. Between $714.25 and $2142.75 the cost moves in steps, and the step that matters is the one where capability changes rather than where materials improve.
Looking after zhonggong electric lifting hydraulic puller
Store, clean and check. Those three habits cover nearly everything that goes wrong.
- Clean the forcing screw thread and oil it before every pull; a dry thread doubles the effort.
- Check jaw tips for cracks and deformation after each heavy pull.
- Keep the hydraulic hose off the floor and check the coupler for grit.
- Store pullers with the jaws closed and the screw wound in.
- Change the hydraulic oil at the maker’s interval and bleed the system afterwards.
- Never leave a puller standing loaded overnight.
Buying in quantity
Ordering more than one changes the calculation. Unit prices for larger quantities are quoted separately, and the saving usually appears once the order goes past a small multiple rather than on the second item.
For trade buyers the practical question is how many will be consumed in a year. Buying a year’s worth at once removes the cost of repeat shipping and the risk of a size going out of stock mid job.
Fitting and first use
Check the item against the listing as soon as the parcel is opened. Size, option and finish are the three things that are wrong when something is wrong, and all three are obvious in the first minute.
Read the maker’s clearance and torque figures before the first use rather than after. Nearly every early failure in a range like this is an installation problem rather than a manufacturing one.
Frequently Asked Questions
A short set of answers to the commonest questions on Zhonggong Electric Lifting Hydraulic Puller.
Two-jaw or three-jaw puller?
Three jaws spread the load and hold the part square, which suits tight bearings. Two jaws are easier to fit where there is little room behind the part.
Can I add heat to help a pull?
Yes, and it is usually better than more tonnage. Warm the housing evenly, never the shaft, and stay inside the bearing and seal temperature limits.
Why does the pump stall before the part moves?
The load is past the rated tonnage, or the screw is off centre so the effort is bending a jaw instead of moving the part.
Which option should I start with?
Start with the entry option if the job is occasional, and move up the range only when the work is regular or the material is demanding.
Is there a warranty?
Faults in manufacture are covered under the standard warranty. Keep the order details, because the warranty is handled against the original purchase.
Choosing the right one
Decide the job, decide the size, then buy the option that covers it with a little in hand. That is the whole method.
The Zhonggong Electric Lifting Hydraulic Puller range here covers every option listed above, with live stock and pricing.
For most buyers the practical step is to write down the two or three figures that matter, compare the option table against them, and ignore everything else on the listing.
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