Extended 550 Shellplate Bolt
Extended 550 Shellplate Bolt
Extended 550 Shellplate Bolt - Installed w Oilite BearingOEM Shellplate Bolt - Press Ram with Set Screw Removed
Click to enlarge image(s)

When shellplate bearing kits are added to the RL 550 press, the Shellplate Bolt (#13794) is typically raised about 1/8". On some presses this is enough to prevent the Brass Tip Set Screw (#13923) from locking the Shellplate Bolt. The solution is this Extended 550 Shellplate Bolt.

550 Press Ram

Even with a stock RL 550 press, the Shellplate Bolt may be short enough that the Brass Tip Set Screw doesn't make full contact on the bolt's shoulder (see photo at right). This can only be made made worse when installing shellplate bearing kits. The only solution is to install a longer Shellplate Bolt.

Shoulder Extended 0.2″
Ultra-Low Profile Head
Smooth Flat Flange is Ready for a Bearing
Heat Treated 4140 Alloy Steel
Hex Socket: 1/4″ (Same as the Original)

Ultra‑Low Profile Bolt Head
We designed the Extended 550 Shellplate Bolt with an Ultra‑Low Profile bolt head that doesn't intrude into the central hole of the toolhead at the top of the ram stroke. This not only looks cleaner, but is less likely to interfere with light kits that mount in the toolhead's center hole.

Q: Can I use the Extended 550 Shelplate Bolt on a press without a shellplate bearing?
A: The stock Shellplate Bolt is usually just long enough that it works OK as is. That said, the Extended 550 Shellplate Bold may fit on stock presses but will have only about a 1/3 of a turn past normal shellplate adjustment before it bottoms out. The determining factor is how much of the shoulder is visible in the hole for the set screw. If the brass tip of the set screw isn't making 100% contact on the shoulder of the Shellplate Bolt, then it is worth trying.

Q: Can I use the Extended 550 Shelplate Bolt on an XL 650 or XL 750 press?
A: No. The 650/750 Shellplate Bolt is a different design and an extended Shellplate Bolt is not know to be needed.

Shoulder Length 1.7″
Shoulder Diameter 0.4972″ - 0.4979″
Head Thickness (approx.) 0.9″
Hex Socket 1/4″
Thread 3/8-16 UNC
Material 4140 Alloy Steel
Hardness 38 - 39 HRC
Submit a Review...