Selection Guide of JTB Series Ball Screw Jacks

Find out more about how to correctly select a complete part number of JTB series ball screw jacks?
According to the following sample part number with corresponding additional informaton about JTB series ball screw jacks designs, configurations, end conditions, worm shaft codes and accessories. 

1. Models
JTB-1T, JTB-2.5T, JTB-5T, JTB-10T, JTB-15T, JTB-20T, JTB-25T, JTB-35T.
Note: click your required model web pages directly, there are specifications tables and assembly drawings for your reference.

2. Configuration and Designs
US = Upright Translating Screw Design;          IS = Inverted Translating Screw Design
UK = Upright Anti-rotation Screw Design;       IK = Inverted Anti-rotation Screw Design
UR = Upright Rotating Screw Design;              IR = Inverted Rotating Screw Design
Note: The ball screw of a translating screw design jack must be attached to the load (guided) which prevents the ball screw from rotating. Add linear guides, rails or rolls are recommended.
Note: If your application involves a load which is unattached, unguided or the load is free to rotate and not translate, then a anti-rotation screw design jack are required to prevent ball screw rotation. For ball screw jack with anti-rotation device which are supplied with a square nut on the lifting ball screw's end, inside a square cover pipe.


3. Travel Length
There are no standard travel length and all JTB series ball screw jacks travel length are built with customers required. 
Note: If compressive loads, must consider the lead screw permissible buckling load.

4. Gear Ratios
Each JTB series ball screw jacks in two worm gear ratios, H: high speed, L: slow speed

Models	H - High Ratio	Travel Length (mm),  Per Turn of Worm (Input Shaft)	L - Slow Ratio	Travel Length (mm),  Per Turn of Worm (Input Shaft)
JTB-1T	1/6	0.83	1/24	0.21
JTB-2.5T	1/6	0.83	1/24	0.21
JTB-5T	1/6	1.67	1/24	0.42
JTB-10T	1/8	1.25	1/24	0.42
JTB-15T	1/8	1.25	1/24	0.42
JTB-20T	1/8	1.50	1/24	0.50
JTB-25T	1/10.667	1.50	1/32	0.50
JTB-35T	1/10.667	1.87	1/32	0.63

5. Screw End Conditions
Standard trapezoidal screw end conditions include I=top plate (fixing flange), II=clevis end (pivot bearing end), III=plain end, IV=threaded end, VI=fork end, VII=rod end, and no screw end with full threads lead screw.


6. Worm (Input Shaft) Codes & Motor Flange Input Codes
A = Left side shaft        B = Right side shaft        C = Double input shaft
M1 = Left side shaft, Right side motor flange   
M2 = Right side motor flange
M3 = Right side shaft, Left side motor flange   
M4 = Left side motor flange
Note: Motor flange input types, if need to purchase the motor from us, your purchase orders must be marked. Otherwise, we only sale screw jack with motor flange.


7. Additional Accessories
JTB series ball screw jacks with a comprehensive range of accessories like FC=Flex couplings, UJ=Universal joints, TUJ=Telescopic universal joints, CS=Connecting shafts, HW=Hand wheels, PB=Pillow blocks, FB=Flange blocks, RE=Rod ends, LSB=Linear shafts and bearings, LGB=Linear guides and bearings, TSC=Telescopic spring covers, BB=Bellows boot, PP=Protection tubes, TAP=Trunnion adapter plates, TMB=Trunnion mounting brackets, MF=Motor flanges, WGR=Worm gear speed reducers, HGR=Helical gear reducers, EM=Single phase or three phase induction motors, STM=Stepper motors, SEM=Servo motors, DCGM=DC geared motors, REN=Rotary encoders, LS=Travel limit switches, FIN=Frequency inverters, PIN=Position indicators, SN=Stop nuts, TN=Travel nuts, SNU=Safety nuts.

Warning:
1. Input RPM should not exceed 1500 RPM.
2. Never exceed the JTB series ball screw jacks static and dynamic capacity.
3. Never exceed the power listed in our JTB series ball screw jacks specification tables. If the maximum power recommendation is exceeded, reduce the speed, use a larger capacity ball screw jacks, choose another ball screw jacks ratio.