RG7 Gunmetal (CuSn7Zn4Pb7)

RG7 (CuSn7Zn4Pb7) leaded bearing bronze. With its good sliding properties and ease of machining, it is a widely used bronze for bushes.

Grade and sizes

CuSn7Zn4Pb7-C · CC493K

RG7

A leaded cast bronze with about 7 % tin, 4 % zinc and 7 % lead. The lead improves the sliding properties and reduces the risk of seizure if lubrication is briefly interrupted (emergency running properties); it is also easy to machine. Used for plain bearings, bushes, slideways and pump parts at moderate loads and speeds.

INTERNATIONAL EQUIVALENTS

EN CC493K · DIN 2.1090 · UNS C93200
Casting standard: EN 1982

SOLID BAR: Ø10–300 mm
HOLLOW BAR (CAST, FOR BUSHES): OD 10–300 mm · ID on request
FLAT AND SQUARE BAR: On request
LENGTH: Up to 3 m
CASTING PROCESS: Sand casting and continuous casting
ORDERING: Cut to length, minimum 5 kg

For large-quantity orders, other cut sizes are possible.

Request a quote on WhatsApp Calculate weight ↓Request technical data

Chemical composition, mechanical properties and material certificates are available on request.

RG7 gunmetal (CuSn7Zn4Pb7) weight calculator

Calculate the weight from the size, or the length and number of pieces needed for a target weight. Your selections are added to the quote message automatically.

FORM

Diameter (Ø)mmLengthmmQuantitypcs

RG7: calculated with a density of 8.8 g/cm³.

TOTAL THEORETICAL WEIGHT

6.91 kg

6.91 kg per piece · quantity: 1 · 17.28 kg/m

Order terms: Cut to length, minimum 5 kg. This is a theoretical weight; we invoice on the actual weight as weighed.

YOUR MESSAGE

Hello, I would like a quote for RG7 Gunmetal (CuSn7Zn4Pb7) (solid bar).
Size: Ø50 × 400 mm, quantity: 1 (theoretical ~6.91 kg)

Request a quote for this size on WhatsApp or send by e-mail →

For other bronze sizes, weight-per-metre tables and densities, see the Bronze weight calculator →

Applications

Plain bearings and bushes
Machine slideways
Pump and compressor bushes
Agricultural machinery bushes

Frequently asked questions

What is the difference between RG5 and RG7?

RG7 contains more lead and performs better in plain bearings and bushes where lubrication is insufficient. RG5 is used mainly for valves, fittings and parts that must be pressure-tight.

What are the designations for RG7?

RG7: CuSn7Zn4Pb7-C, EN CC493K, DIN 2.1090, UNS C93200. Any of these designations can be used in your enquiry; we will match the correct material.

Why can the invoiced weight differ from the calculated weight?

The calculator gives the theoretical weight. The actual weight varies with dimensional tolerances and cutting allowance; we invoice on the actual weight as weighed.

What information should I send for a quote?

We only need the size (diameter × length), quantity and delivery location. If you fill in the calculator above, these details are added to the WhatsApp message automatically.