FAQ - Shandong Changsheng Rotary Joint Co., Ltd

Questions on product purchase storage, maintenance, repair or document publication, etc.

Q: Can we purchase a part from your company?

A: You can purchase it through a distributor or dealer. However, it is not covered by our product warranty as you perform disassembly/assembly by yourself.

Q: Can we purchase grease from your company?

A: We are not selling grease.

Q: Although we would like to replace a Joint being used, its type designation is not shown on your catalog or website. Can you create it?

A: Although we can create it in most of cases, we check and reply if it is possible to create it. In order to identify your product, please let us know its "model name", "manufacturing number", and "manufacturing date" shown on the nameplate. If you have the product drawing, please let us know the "drawing number" shown on the bottom right of the product drawing.

Q: Do you accept an order for product repair?

A: We check and reply if it is possible to repair your product. Depending on products, expenses for purchasing new products may be lower than repair expenses

Q: We'd like to store an unused product as a spare item. Please advise us how to store it.

A: Wrap the product to prevent foreign objects from entering it, and store it in dry environment at 10℃ to 40℃(Our recommended storage method).

Q: We have an unused product that has been stored for several years. ls it possible to use it as is?

A: If it has been stored for less than two years using our recommended method, you can use it as is. lf it has been stored for two years or more, please contact our distributor or dealer for maintenance.

Q: Is grease filled in the product before shipment?

A: Grease is filled in the product before shipment unless you have requested not to do so.

Q: What is the brand name of the grease filled before shipment?

A: It depends on products. For a ready-made product (listed in the catalog, the grease brand is shown in its instruction manual available on our website. For a customized product, see its product drawing. The brand is shown on the top right of the product drawing

Q: Can we use a grease that is different from the one filled in the product before shipment from your company?

A: Use the same grease as the one filled in the product before shipment. Do not use grease mixed with other ones. Doing so may reduce the Lubricating effect.

Q: Please advise us how to fill the grease.

A: Remove the grease outlet plug and fill the grease through the grease nipple (grease inlet). Continue to fil until new grease comes out from the grease outlet.

Q: Please advise us the greasing frequency and grease amount.

A: Greasing frequency depends on the temperature of fluid to be used. Furthermore, the grease amount varies depending on the size, For a ready-made product (listed in the catalog, see its instruction manual available on our website. For a customized product, please contact our sales representative.

Q: What is the plug located on the opposite side of the grease nipple?

A: It is a plug used for blocking the grease outlet. Be sure to remove it before greasing.

Q: Please advise us the grease nipple thread size

A: It depends on products. See the product drawing to check the size

Q: We would like to obtain the product drawing

A: The product drawing is available in PDF format. As it is not available on our website, please contact our sales representative.

Q: We'd like to obtain the CAD data of the product drawing

A: Although we don' t release the CAD data of the product drawing, we can provide the CAD data of the outline drawing(2D data in DXF format).

Q: We'd like to know dimensions that are not shown on the catalog

A: See the product drawing for dimensions. lf they are not shown on the product drawing, please contact our sales representative.

Q: We would like to obtain the instruction manual

A: For a ready-made product (listed in the catalog), its instruction manual is available on our website. For a customized product, please contact our sales representative

Q: Is an inspection report available?

A: It is available. Please request it when ordering.

Q: Is a mill test report available?

A: It is available. When ordering, please request it by attaching the list of parts that need material certificates

Q: Is a certificate of non applicability available?

A: It is available. Please request it when ordering

Q: Does your product comply with the modified RoHS (RoHS2)?

A: A ready-made product (shown on the catalog) complies with the modified RoHS. For a customized product. please contact our sales representative.

Q: Please let us know the country of origin of the product

A: Japan.

Q: What is a cause for early leakage?

A: Early leakage often occurs due to dirt fluid or improper installation method. lt may occur due to erroneous choice of the product in rare occasions.

Q: What inspection is performed before shipment?

A: Appearance and air tightness inspections are performed for all products.

Q: RJ, SJ, or BJ is shown on the shipment notification or delivery slip issued by your company. What does it mean?

A: SJ is short for Swivel joint, Ru is short for Rotary Joint, and BJ is short for Ball joint. It is a code for identifying the product category and shown before the type designation.

Questions on rotary joints

Q: Is it possible to use a rotary joint for operation with no rotation, intermittent rotation, or low-rotation speed (a few rotations per minute)?

A: In general, a rotary joint is not suitable for nonrotating, intermittent rotating, or low-speed rotating operation. However, we are providing OPM series (products with type names beginning with OP) as customized products suitable for such operation. Contact our sales representative for more information.

Q: Are the fluid inlet (supply port) and outlet (discharge port) specified?

A: The fluid inlet and outlet are not specified. You can select them according to your equipment.

Q: Which thread direction (left or right) is best for the roll side thread that secures a rotary joint?

A: An installation thread must be such that it is tightened when a roll is operated. Select a left-hand thread for a roll that rotates clockwise when viewed from the rotary joint installation side, and select a right-hand one for a roll that rotates counterclockwises.

Q: Is a product on which a connecting port and a rotation stopper are installed direction from the catalog available?

A: It is available. Please let our sales representative know your demand as it is handled as a customized product.

Q: Please let us know a product that can be used in a vacuum condition.

A: For this product, please contact our sales representative.

Q: Does a product include an internal pipe?

A: It does not include an internal pipe. Please let our sales representative know the tip shape and dimensions of an internal pipe if you order a product with it.

Q: We'd like to order an internal pipe

A: Please let our sales representative know the tip shape and dimensions of the internal pipe

Q: What is the purpose of the hole on the casing?

A: It is used for detecting early fluid leakage and known as an inspection hole

Q: Can the product be installed and used with the inspection hole facing in directions other than down?

A: Be sure to install the product so that the inspection hole faces downward. If this hole is directed in other directions, leakage cannot be detected in the early stage

Q: Can this hole be blocked?

A: Do not block the inspection hole. If it is blocked, leakage cannot be detected in the early stage

Q: Does a flange connection type product include a gasket?

A: It includes a shaft end gasket. Stud bolts, hex., nuts, and spring washers are also included

Q: What is the expected product lifetime?

A: It depends on use conditions (fluid, pressure, temperature, and rotation speed). It also depends on production installation conditions.

Q: The thread direction of the product is 'RH', but it seems to be indicated as 'R' on the product nameplate.

A: R is short for RH and indicated on a product previously sold. This idea is also applied to LH and L.

Q: The thread direction is indicated as "L-R". What does this mean?

A: 'L" indicates the thread direction of the rotor, and "R" indicates thread direction of the internal pipe. "R-L" indicates opposite meaning.

Q: We cannot rotate the rotor of the newly bought product

A: If transmission torque from the rotor side is lower than starting torque, the rotor cannot be rotated. Starting torque is higher than dynamic torque, and starting torque becomes even higher when wringing occurs.

Q: A substance like oil is leaking from the ball bearing.

A: After a long-time storage or depending on service environment, oil released from the ball bearing grease may seep from the ball bearing gap. Wipe it off with a cloth. Consult with our sales representative if oil seepage has negative impact on use conditions.

Q: Does your company have a rotary joint available for dry air?

A: We are providing customized products that the grease is filled in the mechanical seal section. Contact our sales representative for more information.