BLT026 Specifications and Instructions

BLT026 Photo
 
 

Model BLT026-2 Translator
with 2¾" (70 mm) conflat flanges

Despite its modest price, the BLT026 will provide years of trouble-free service, especially if simple maintenance is performed. Due to the three jacking-screw pattern (see drawing), the BLT026 provides the maximum rigidity of any translator on the market and is capable of holding axial loads in excess of 150 pounds with no deflection problems. A total of six locking screws (three for each flange) hold the 2¾" (70 mm) flanges within the brackets. The advantage of this design is that the screws can be loosened, even while the translator is installed, and the actuator portion of the translator can be repositioned radially around the flange. This feature allows re-positioning of the BLT mechanism to clear things like ion guns and other equipment.

Maintenance Instructions:

As delivered, the lead screws are coated with baked-on molybdenum BLT026 Drawingdisulfide. This coating will degrade over time, due to moisture in the atmosphere. After bake out, lightly relubricate the screws with the (provided) silicone-based molybdenum disulfide grease. Be especially careful not to use a hydrocarbon grease such as Felpro C100 TM unless you periodically clean the oxidized residue from all load-bearing surfaces. The normal bakeout temperature is 150oC, but higher temperatures can be used if needed. For bakeouts between 150oC and 210oC, increase the frequency and thoroughness of lubrication.

On both the 3-ear and the 6-ear model BLTs, the flanges may need to be re-aligned to parallel after removing or replacing the chain.

Should it become necessary to adjust the alignment of the two flanges:

  • First remove the retainer clip and master link from the chain.
  • Remove the chain from the sprockets.
  • Using dial calipers or some other measuring instrument, to measure the distance between the vacuum faces of the two flanges at three places around the circumference.
  • Adjust the three screws individually so that the flanges are parallel to within 0.005" (0.12 mm).
  • Replace the chain and master link.
  • Do science.

Price list

Model BLT026 Translator
with 2¾" (70 mm) flanges
Model  Stroke Clear I.D. OAL Compressed  Price*
BLT026-2
2" (50)
1.50" (38)
2.5" (63)
 $1550
BLT026-3
3" (75)
1.50" (38)
2.75" (70)
 $1800
BLT026-4
4" (100)
1.50" (38)
3.0" (75)
 $2300
BLT026-6
6" (150)
1.50" (38)
3.5" (87)
 $2800
BLT026-8
8" (200)
1.50" (38)
4.0" (100)
 $3300

Dimensions are in inches (mm)     - and -     *Prices are in U.S. Dollars
Tapped flange (1/4-28 UNF or M6), add $15
Add $90 for scale and mounting brackets
1" travel dial indicator, add $150
DC motor , power supply, limit switches
and pendant switch, add $1200
- Options -
Guide rods, add $310
Stepper motor and limit switches, add $625
View with stepper motor plus guide rods
Stepper motor controller*, first axis, add $1500
Additional axes (may be combined - consult factory), add $750

Other sizes and models are available. Please consult the factory.

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Last Updated: January 2008