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Description
Theoben / Weihrauch HW90 Gas Ram Charging Pump Kit – Slim JimSuitable for HE and non HE Rams. 1 BA, and Standard Schrader Valve threads. DO NOT USE A DIVE CYLINDER. CHRONO AFTER ADJUSTMENT Want to purchase the cutting edge FX Airguns Pocket Chronograph from our store? BUY HERE Some useful information from: AirgunBBS Forum Thread 245395 The HE models (HE will be stamped on top of the breech) run at 700 1000PSI, depending on barrel length, calibre and the condition of the gun. 800 850 is most common, but Id
Suitable for “HE” and non “HE” Rams. 1-BA, and Standard Schrader Valve threads.
DO NOT USE A DIVE CYLINDER. CHRONO AFTER ADJUSTMENT
Want to purchase the cutting edge FX Airguns Pocket Chronograph from our store? BUY HERE
Some useful information from: AirgunBBS Forum Thread 245395
- The “HE” models (HE will be stamped on top of the breech) run at 700-1000PSI, depending on barrel length, calibre and the condition of the gun. 800-850 is most common, but I’d suggest to start at 700PSI and work upwards. More than 1000PSI risks damage to the ram. If it takes that much to get 11+ftlb, then the gun needs new breech, piston and ram seals.
- The pre-HE models run with half or less of the “HE” pressure.
- What is “HE” and why does it need more pressure? “HE” = high efficiency.
- It needs more pressure because the later Theoben’s have a short stroke length of just over two inches, with a cylinder bore of just over an inch.
- The stroke of the piston on a 12 ft lbs Theoben gas ram is 2.6 inches “HE” or not. The diameter of the (dummy piston) or gas ram on the “HE” model is 1/3 of that of the earlier one and the pressure goes up from 300 psi non “HE” to 750 psi “HE”. To achieve FAC velocity the stroke is increased to 3.2 inches the eliminator has a stroke of 3.7 inches. All Theobens after TB 6000 are “HE”.
- If I go over the 12ft/lb limit I gently tap the valve with a pin punch about “PFFFFFFT” is enough. It takes a bit of practice to do without a “POP” and a cloud of oily air being evident.
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4.4 ★★★★★
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Product Reviews
★★★★★ 5
Very versatile and durable dog toy
This is not a good toy to leave wit big dogs unattended. That being said it is a GREAT dog toy for households that have a variety size of dogs. Our Golden Retriever and 6 pound Pomeranian both play with it. Both retrieve it and occasionally share carrying it back to us. I know it will eventually get destroyed but that is what dog toys are for. Very durable and with the holes, it allows small dogs to pick it up as easily as larger dogs.
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Reviewed in the United States on July 19, 2025
★★★★★ 5
Keeps my dog busy
This works great for rolling treats up in fleece and putting them in the ball. The ball material is flexible and durable. This is a fun and engaging activity for when the weather prevents outside fun.
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Reviewed in the United States on October 28, 2025
★★★★★ 5
The best dog ball EVER!!!
Our 3 y.o. Mini Australian shepherd destroys every toy that she can. We can’t have any kind of cloth toys, including the heavy duty, triple stitched, fire hose Kong toys. We can’t have rope toys, even the balls. There are many rubber or silicone toys we also can’t have as she destroys them as well. She has 5 of these balls, some for over a year and they are still in GREAT shape. Left in the sun, rain, etc, they just hold up. They also don’t have a lot of surface area to hold slobber so your hand doesn’t get all wet. Heavy enough to still throw a fair distance, but light enough that the dog was fine the few times I’ve accidentally drilled her in the ass. These are the best.
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Reviewed in the United States on July 11, 2021
★★★★★ 5
The best dog ball!
I have bought about 8 of these balls now. Mostly because my dog looses his or I’m buying them for my other dog friends. I put a dog bone in it at dinner time and it keeps my dog occupied while I’m eating my dinner. He loves it and so do I! They also have different sizes. We recently got a bigger dog breed so I got the biggest one. He loves it as well! Worth every penny!
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Reviewed in the United States on June 17, 2023
★★★★★ 5
Long term durability and still my dogs fav toy!
We’ve had this ball for 13 months now. It’s still my dogs #1 favorite toy. I have dogs like that to chew and they have tried but this thing is still fully intact. Definitely got my moneys worth and my dogs love it!!
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Reviewed in the United States on June 24, 2024