Xylem Bell & Gossett e-1510 Series User manual

Safety
• Proper personal protective equipment (PPE), adequate safety guards and proper material lifting
equipment are required for all machining and grinding operations.
• Gloves suitable for protection from sharp edges should be used during impeller handling and
machining, such as ANSI Cut Level 3 gloves.
Trimming
When it is necessary to reduce the pump ow rate and generated head by trimming the impeller diameter, the
following guidelines apply for machining the outer diameter of stainless steel impellers. These same machining
procedures can also be used for bronze impellers.
• To select the proper reduced diameter, review the pump hydraulic selection data and consult your
local Xylem representative.
• For certain models, as listed in the pump manual, a special Angle Cut is required on the impeller outer
diameter. Before trimming the impeller, look for a section in the pump manual titled Angle Cut.
• The recommended lathe is 30 hp (22 kw) or greater, with a minimum of two tool holders and suitable
for 13.5 in. (342.9 mm) diameter. A 20 hp lathe can be used, but will result in half the depth of cut
during roughing and extended trimming time.
• The impeller must be rigidly held in the lathe, therefore, the use of an arbor is recommended. The arbor
can be overhung from the chuck and does not need a tailstock, but if desired, a tailstock can be used.
See the pump Replacement Parts List if it is desired to purchase impeller trimming arbors.
• The recommended machining insert for roughing is Sandvik RCMT 20 06 MO 2025 and for the nish
cut Sandvik DCMT 3(2.5)2-UM 1115. Both are used without coolant.
e-1510, e-1532, e-1531, e-80, e-80SC, e-80SCXL,
e-82, and e-82SC pumps
Stainless Steel Impeller Trimming Guidelines
INSTRUCTION MANUAL
P2002535
REVISION C
This product can expose you to chemicals including
Lead which is known to the state of California to cause
cancer or birth defects or other reproductive harm. For more
information go to: www.P65Warnings.ca.gov.
WARNING

Xylem and Bell & Gossett are trademarks of Xylem, Inc. or one of its subsidiaries.
All other trademarks are property of their respective owners.
© 2022 Xylem Inc. P002535_C_en-US_2022-11.SS TRIM
Xylem, Inc.
8200 N. Austin Avenue, Morton Grove, Illinois 60053
Phone: [phone], Fax: [phone]
www.xylem.com/bellgossett
• Recommended spindle speed is 460 surface feet per minute (SFM) (76.2 surface meter per minute (SMM)).
• To calculate the spindle speed (RPM), use the formula RPM=(SFM*12)/(3.1416* diameter of cut, in.)
(RPM=(SMM*39.37)/(3.1416* diameter of cut, mm/25.4)). As reference, the calculation results in the following:
Impeller Max. Diameter Recommended Spindle Speed (RPM)
7 in. (177.8 mm) 251
9.5 in. (241.3 mm) 185
11 in. (279.4 mm) 160
13 in. (330.2 mm) 135
13.5 in. (342.9 mm) 130
14 in. (355.6 mm) 126
15 in (381 mm) 117
15.5 in. (393.7 mm) 113
16 in. (406.4 mm) 110
17 in. (431.8 mm) 103
18 in. (457.2 mm) 97
• Recommended rough cut feed rate per revolution is 0.008 in. (0.20 mm) with depth of cut 0.170 in (4.3 mm)
per side.
• Recommended single nish cut feed rate per revolution is 0.008 in. (0.20 mm) with depth of cut 0.025 in
(0.63 mm) per side.
• For deburring, a high speed air tool is recommended with a ¼” shank and a carbide cone tip grinding burr.
For more information: